Servos and brake force correctors

At the Global Parts automotive store, we offer a wide selection of original used car parts, including brake boosters and brake fluid regulators for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. The brake boosters and brake fluid regulators we offer undergo quality control to ensure you receive a top-quality product.

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BMW 1 3 SERIES E81 E87 E90 E90N E91 E92 E93 Brake Servo Unit 6775930

-15%

Part no. rhd-6775930

BMW 1 3 SERIES E81 E87 E90 E90N E91 E92 E93 Brake Servo Unit 6775930

Promo price

£23.95

£20.36

Free delivery: Feb 25

If paid before 14:00

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BMW E81 E87 E90 E91 Brake Servo Master Cylinder Brake Booster Unit 6788042

Part no. 6788042

BMW E81 E87 E90 E91 Brake Servo Master Cylinder Brake Booster Unit 6788042

£13.95

Free delivery: Feb 25

If paid before 14:00

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Mini R50 Brake Servo Unit Brake Master Cylinder 6757181

Part no. 6757181

Mini R50 Brake Servo Unit Brake Master Cylinder 6757181

£23.95

Free delivery: Feb 25

If paid before 14:00

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BMW 1 3 X1 Series E81 E84 E87 E90 E91 E92 E93 Brake Servo Vacuum Pipe

-5%

Part no. rhd-7577337

BMW 1 3 X1 Series E81 E84 E87 E90 E91 E92 E93 Brake Servo Vacuum Pipe

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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Mini R55 R56 R60 Brake Servo Braking Unit Master Cylinder 6786583

-15%

Part no. 6786583

Mini R55 R56 R60 Brake Servo Braking Unit Master Cylinder 6786583

Promo price

£23.95

£20.36

Free delivery: Feb 25

If paid before 14:00

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BMW 1 3 4 Series F20 F21 F30 F31 F32 Brake Servo Unit Master Cylinder 6798419

-15%

Part no. rhd-6798419

BMW 1 3 4 Series F20 F21 F30 F31 F32 Brake Servo Unit Master Cylinder 6798419

Promo price

£18.95

£16.11

Free delivery: Feb 25

If paid before 14:00

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BMW 1 3 SERIES E81 E87 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6775932

Part no. rhd-6775932

BMW 1 3 SERIES E81 E87 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6775932

£28.95

Free delivery: Feb 25

If paid before 14:00

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Mini Cooper One R55 R56 R60 R61 Brake Servo Unit Master Cylinder 6788953

Part no. 6788953

Mini Cooper One R55 R56 R60 R61 Brake Servo Unit Master Cylinder 6788953

£23.95

Free delivery: Feb 25

If paid before 14:00

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BMW 1 3 E81 E90 E91 E92 LCI 1 Brake Servo Unit Master Cylinder 6785649

Part no. rhd-6785649-1

BMW 1 3 E81 E90 E91 E92 LCI 1 Brake Servo Unit Master Cylinder 6785649

£18.95

Free delivery: Feb 25

If paid before 14:00

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BMW 1 3 Series E81 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6764126

-15%

Part no. rhd-6764126

BMW 1 3 Series E81 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6764126

Promo price

£18.95

£16.11

Free delivery: Feb 25

If paid before 14:00

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Mini Cooper One R56 Brake Servo Unit Master Cylinder Expansion Tank 6770909

-15%

Part no. 6770909

Mini Cooper One R56 Brake Servo Unit Master Cylinder Expansion Tank 6770909

Promo price

£28.95

£24.61

Free delivery: Feb 25

If paid before 14:00

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Mini Cooper One R50 R52 R53 Vacuum Pipe Brake Servo 6761456

-5%

Part no. rhd-6761456-1

Mini Cooper One R50 R52 R53 Vacuum Pipe Brake Servo 6761456

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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Mercedes-Benz A W169 Brake Fluid Reservoir Screw Filler Tank Cap A2024300014

-5%

Part no. A2024300014

Mercedes-Benz A W169 Brake Fluid Reservoir Screw Filler Tank Cap A2024300014

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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BMW F20 F21 F30 F31 F32 F80 F82 Brake Master Cylinder Reservoir Tank Cap 6851090

-5%

Part no. 6851090

BMW F20 F21 F30 F31 F32 F80 F82 Brake Master Cylinder Reservoir Tank Cap 6851090

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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Mini Cooper One R55 R56 R57 R60 Brake Servo Unit Master Cylinder 6785182

-15%

Part no. 6785182

Mini Cooper One R55 R56 R57 R60 Brake Servo Unit Master Cylinder 6785182

Promo price

£23.95

£20.36

Free delivery: Feb 25

If paid before 14:00

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Mercedes-Benz Sprinter W906 Brake Booster Servo Master Cylinder A9064300908

-15%

Part no. rhd-A0004312127

Mercedes-Benz Sprinter W906 Brake Booster Servo Master Cylinder A9064300908

Promo price

£32.95

£28.01

Free delivery: Feb 25

If paid before 14:00

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BMW 1 3 Series E81 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6776943

-15%

Part no. rhd-6776943

BMW 1 3 Series E81 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6776943

Promo price

£18.95

£16.11

Free delivery: Feb 25

If paid before 14:00

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Brake Servo BMW X3 E83 Unit Master Cylinder 3403547

-15%

Part no. 3450589

Brake Servo BMW X3 E83 Unit Master Cylinder 3403547

Promo price

£32.95

£28.01

Free delivery: Feb 25

If paid before 14:00

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BMW 1 3 4 Series 1 F20 F21 F30 F31 F32 Brake Servo Unit Master Cylinder 6798419

-15%

Part no. rhd-6798419-1

BMW 1 3 4 Series 1 F20 F21 F30 F31 F32 Brake Servo Unit Master Cylinder 6798419

Promo price

£18.95

£16.11

Free delivery: Feb 25

If paid before 14:00

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Mini R55 R56 R60 R61 Brake Servo Braking Unit Master Cylinder 6863499

-15%

Part no. 6863499

Mini R55 R56 R60 R61 Brake Servo Braking Unit Master Cylinder 6863499

Promo price

£23.95

£20.36

Free delivery: Feb 25

If paid before 14:00

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BMW 3 Series E92 E93 320i N43 Brake Servo Unit Master Cylinder 6775932

-40%

Part no. rhd-6775932-1

BMW 3 Series E92 E93 320i N43 Brake Servo Unit Master Cylinder 6775932

Promo price

£28.95

£17.37

Free delivery: Feb 25

If paid before 14:00

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BMW Mini One R50 R52 Brake Servo Unit Master Cylinder Expansion Tank 6778723

-15%

Part no. 6778723

BMW Mini One R50 R52 Brake Servo Unit Master Cylinder Expansion Tank 6778723

Promo price

£47.95

£40.76

Free delivery: Feb 25

If paid before 14:00

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BMW 5 6 Series E60 E61 E63 E64 Brake Servo Unit 6786556

-15%

Part no. 6786556-1

BMW 5 6 Series E60 E61 E63 E64 Brake Servo Unit 6786556

Promo price

£47.95

£40.76

Free delivery: Feb 25

If paid before 14:00

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Mercedes-Benz Sprinter W906 Brake Booster Servo Master Cylinder A9064300308

-15%

Part no. rhd-A0004311927

Mercedes-Benz Sprinter W906 Brake Booster Servo Master Cylinder A9064300308

Promo price

£47.95

£40.76

Free delivery: Feb 25

If paid before 14:00

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Mini Cooper One F55 F56 Engine Vacuum Pipe Hose Line Brake Servo 8513331

Part no. 8513331

Mini Cooper One F55 F56 Engine Vacuum Pipe Hose Line Brake Servo 8513331

£13.95

Free delivery: Feb 25

If paid before 14:00

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Brake Servo Mercedes W639 Brake Booster Unit Master Cylinder A0014300108

-15%

Part no. A0014300108

Brake Servo Mercedes W639 Brake Booster Unit Master Cylinder A0014300108

Promo price

£28.95

£24.61

Free delivery: Feb 25

If paid before 14:00

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BMW E87 E90 E92 Brake Master Cylinder Reservoir Cap Warning Switch 6774451

-5%

Part no. 6774451

BMW E87 E90 E92 Brake Master Cylinder Reservoir Cap Warning Switch 6774451

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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X1 E84 6775930

-40%

Part no. rhd-6775930-1

X1 E84 6775930

Promo price

£23.95

£14.37

Free delivery: Feb 25

If paid before 14:00

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BMW 5 6 Series E60 E61 E63 E64 Brake Servo Unit 6778826

-15%

Part no. 6778826-1

BMW 5 6 Series E60 E61 E63 E64 Brake Servo Unit 6778826

Promo price

£42.95

£36.51

Free delivery: Feb 25

If paid before 14:00

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BMW Mini Cooper One F55 F56 F57 Brake Servo Unit Master Cylinder 6854640

-5%

Part no. 6854640

BMW Mini Cooper One F55 F56 F57 Brake Servo Unit Master Cylinder 6854640

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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Brake Servo Unit BMW F20 F21 F22 F30 F31 M Sport Brake Master Cylinder 6798425

-15%

Part no. rhd-6798425-1

Brake Servo Unit BMW F20 F21 F22 F30 F31 M Sport Brake Master Cylinder 6798425

Promo price

£23.95

£20.36

Free delivery: Feb 25

If paid before 14:00

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BMW 1 3 4 Series F20 F21 F30 F31 F32 Brake Servo Unit Master Cylinder 4081077

-15%

Part no. rhd-4081077

BMW 1 3 4 Series F20 F21 F30 F31 F32 Brake Servo Unit Master Cylinder 4081077

Promo price

£16.95

£14.41

Free delivery: Feb 25

If paid before 14:00

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Mini Cooper R50 R52 Brake Servo Vacuum Hose Pipe 6761453

-5%

Part no. 6761453

Mini Cooper R50 R52 Brake Servo Vacuum Hose Pipe 6761453

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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BMW X3 E83 Brake Servo Unit Master Cylinder 293403547061 3403547

-40%

Part no. 3450589-1

BMW X3 E83 Brake Servo Unit Master Cylinder 293403547061 3403547

Promo price

£28.95

£17.37

Free delivery: Feb 25

If paid before 14:00

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Mini Cooper One R55 R56 R57 Brake Master Cylinder Reservoir Tank Cap 6770607

-5%

Part no. 6770607

Mini Cooper One R55 R56 R57 Brake Master Cylinder Reservoir Tank Cap 6770607

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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BMW Z4 E85 Roadster Servo Brake Unit Master Cylinder 6769850

-40%

Part no. 6769850

BMW Z4 E85 Roadster Servo Brake Unit Master Cylinder 6769850

Promo price

£37.95

£22.77

Free delivery: Feb 25

If paid before 14:00

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Mercedes W211 W219 Brake Servo Brake Master Cylinder Booster Unit A2114301030

-15%

Part no. rhd-A2114301030

Mercedes W211 W219 Brake Servo Brake Master Cylinder Booster Unit A2114301030

Promo price

£47.95

£40.76

Free delivery: Feb 25

If paid before 14:00

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BMW 1 3 E81 E87 E90 E91 E92 N43 N47 Brake Servo Unit Vacuum Pipe Hose 8678618

-15%

Part no. rhd-8678618

BMW 1 3 E81 E87 E90 E91 E92 N43 N47 Brake Servo Unit Vacuum Pipe Hose 8678618

Promo price

£18.95

£16.11

Free delivery: Feb 25

If paid before 14:00

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Audi S5 8T Brake Servo Master Cylinder Vacuum Booster 8K0612103M  8K0 612 107 C

-15%

Part no. 8K0612103M

Audi S5 8T Brake Servo Master Cylinder Vacuum Booster 8K0612103M 8K0 612 107 C

Promo price

£28.95

£24.61

Free delivery: Feb 25

If paid before 14:00

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Mini Cooper R55 R56 R57 R60 Brake Servo Unit Master Cylinder 6863498

-15%

Part no. 6863498

Mini Cooper R55 R56 R57 R60 Brake Servo Unit Master Cylinder 6863498

Promo price

£28.95

£24.61

Free delivery: Feb 25

If paid before 14:00

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BMW E81 E82 E87 LCI E88 123d Brake Servo Unit Master Cylinder 6791063

-15%

Part no. rhd-6791063

BMW E81 E82 E87 LCI E88 123d Brake Servo Unit Master Cylinder 6791063

Promo price

£37.95

£32.26

Free delivery: Feb 25

If paid before 14:00

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Mercedes-Benz A B Class W169 W245 Brake Servo Master Cylinder A1694300330

-5%

Part no. A1694301230

Mercedes-Benz A B Class W169 W245 Brake Servo Master Cylinder A1694300330

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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BMW F20 F21 F22 F30 F31 F32 M Sport Brake Servo Unit Master Cylinder 6798425

-15%

Part no. rhd-6851096

BMW F20 F21 F22 F30 F31 F32 M Sport Brake Servo Unit Master Cylinder 6798425

Promo price

£32.95

£28.01

Free delivery: Feb 25

If paid before 14:00

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BMW 7 Series E65 E66 Power Braking Servo Unit Master Cylinder 6769213

-40%

Part no. 6769213

BMW 7 Series E65 E66 Power Braking Servo Unit Master Cylinder 6769213

Promo price

£42.95

£25.77

Free delivery: Feb 25

If paid before 14:00

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BMW Z4 Series E85 2.0i N46 Vacuum Hose Line Pipe Servo Brake 7547579

-15%

Part no. rhd-7547579

BMW Z4 Series E85 2.0i N46 Vacuum Hose Line Pipe Servo Brake 7547579

Promo price

£18.95

£16.11

Free delivery: Feb 25

If paid before 14:00

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Mercedes W166 Brake Servo Booster Master Cylinder Module A1664301330

-40%

Part no. rhd-A1664301130

Mercedes W166 Brake Servo Booster Master Cylinder Module A1664301330

Promo price

£94.95

£56.97

Free delivery: Feb 25

If paid before 14:00

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Mercedes W205 Brake Servo Booster Master Cylinder Module A2054300130

-15%

Part no. rhd-A2054300130

Mercedes W205 Brake Servo Booster Master Cylinder Module A2054300130

Promo price

£18.95

£16.11

Free delivery: Feb 25

If paid before 14:00

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BMW 3 4 Series F30 LCI F32 F80 M3 F82 Brake Servo Unit Master Cylinder 2284896

-15%

Part no. rhd-7849876

BMW 3 4 Series F30 LCI F32 F80 M3 F82 Brake Servo Unit Master Cylinder 2284896

Promo price

£56.95

£48.41

Free delivery: Feb 25

If paid before 14:00

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Audi A4 B9 Master Cylinder Brake Booster Servo Reservoir Unit 8W0612103B

-15%

Part no. 8W0612107

Audi A4 B9 Master Cylinder Brake Booster Servo Reservoir Unit 8W0612103B

Promo price

£28.95

£24.61

Free delivery: Feb 25

If paid before 14:00

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Mercedes Vito Viano W639 Brake Servo Booster Unit Master Cylinder A0014300108

-40%

Part no. RHD-A0014300108

Mercedes Vito Viano W639 Brake Servo Booster Unit Master Cylinder A0014300108

Promo price

£28.95

£17.37

Free delivery: Feb 25

If paid before 14:00

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BMW 5 6 Series E60 E61 E63 E64 N62 N62N Vacuum Pipe Hose Line 7611335

-15%

Part no. rhd-7610750

BMW 5 6 Series E60 E61 E63 E64 N62 N62N Vacuum Pipe Hose Line 7611335

Promo price

£18.95

£16.11

Free delivery: Feb 25

If paid before 14:00

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BMW F20 F21 F22 F30 F31 Brake Servo Unit Master Cylinder 6798423

-15%

Part no. 6798423-1

BMW F20 F21 F22 F30 F31 Brake Servo Unit Master Cylinder 6798423

Promo price

£23.95

£20.36

Free delivery: Feb 25

If paid before 14:00

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Mercedes-Benz A B W176 W246 Brake Servo Booster Master Cylinder A2464301330

-5%

Part no. rhd-A2464300930

Mercedes-Benz A B W176 W246 Brake Servo Booster Master Cylinder A2464301330

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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Audi A4 B8 A5 8T Brake Servo Booster Master Cylinder Module 8K0612103E

-15%

Part no. 8K0612103E

Audi A4 B8 A5 8T Brake Servo Booster Master Cylinder Module 8K0612103E

Promo price

£37.95

£32.26

Free delivery: Feb 25

If paid before 14:00

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Mini Cooper F55 F56 F60 Vacuum Pipe Hose Line Brake Servo 8654731

-15%

Part no. RHD-8654731

Mini Cooper F55 F56 F60 Vacuum Pipe Hose Line Brake Servo 8654731

Promo price

£18.95

£16.11

Free delivery: Feb 25

If paid before 14:00

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BMW Z4 Series E85 Brake Servo Vacuum Hose Pipe 6759932

-40%

Part no. 7500299-1

BMW Z4 Series E85 Brake Servo Vacuum Hose Pipe 6759932

Promo price

£23.95

£14.37

Free delivery: Feb 25

If paid before 14:00

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Mercedes W177 W205 W213 Pressure Sensor Brake Booster Vacuum Servo A0009055204

-15%

Part no. A0009055204

Mercedes W177 W205 W213 Pressure Sensor Brake Booster Vacuum Servo A0009055204

Promo price

£18.95

£16.11

Free delivery: Feb 25

If paid before 14:00

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Mercedes W176 W246 Brake Servo Booster Expansion Tank Cover Cap A2464300330

-5%

Part no. A2464300930-1

Mercedes W176 W246 Brake Servo Booster Expansion Tank Cover Cap A2464300330

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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Servo Cylinder BMW F10 F11 Brake Booster Master Unit 6796726

-5%

Part no. 6796726

Servo Cylinder BMW F10 F11 Brake Booster Master Unit 6796726

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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Ford Transit Mk8 FL Brake Servo Booster Vacuum Sensor Unit GK21-2C444-AA

-15%

Part no. GK212C444AA

Ford Transit Mk8 FL Brake Servo Booster Vacuum Sensor Unit GK21-2C444-AA

Promo price

£28.95

£24.61

Free delivery: Feb 25

If paid before 14:00

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Brake Servo Unit BMW F20 F21 F22 F30 F31 Master Cylinder 6798423

-40%

Part no. 6798423

Brake Servo Unit BMW F20 F21 F22 F30 F31 Master Cylinder 6798423

Promo price

£32.95

£19.77

Free delivery: Feb 25

If paid before 14:00

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Audi A5 8T 2.0 TDI CNHA Brake Servo 8K0612103N

-15%

Part no. 8K0612103N

Audi A5 8T 2.0 TDI CNHA Brake Servo 8K0612103N

Promo price

£28.95

£24.61

Free delivery: Feb 25

If paid before 14:00

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Mini Cooper R50 R52 1 Brake Servo Unit Master Cylinder Expansion Tank 6778723

-40%

Part no. 6778723-1

Mini Cooper R50 R52 1 Brake Servo Unit Master Cylinder Expansion Tank 6778723

Promo price

£47.95

£28.77

Free delivery: Feb 25

If paid before 14:00

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Vacuum Pipe Mercedes W204 S204 C207 Line Hose Brake Servo Unit A2044305029

-15%

Part no. rhd-A2044305029

Vacuum Pipe Mercedes W204 S204 C207 Line Hose Brake Servo Unit A2044305029

Promo price

£18.95

£16.11

Free delivery: Feb 25

If paid before 14:00

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Mercedes-Benz A B Class W169 W245 1 Brake Servo Master Cylinder A1694300330

-5%

Part no. rhd-A1694301230-1

Mercedes-Benz A B Class W169 W245 1 Brake Servo Master Cylinder A1694300330

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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Mercedes W164 W203 C209 Servo Travel Sensor Brake Pedal A1635401217

-15%

Part no. A1635401217

Mercedes W164 W203 C209 Servo Travel Sensor Brake Pedal A1635401217

Promo price

£18.95

£16.11

Free delivery: Feb 25

If paid before 14:00

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Vacuum Pipe Mercedes W176 W246 Line Hose Brake Booster Servo A2464300929

-5%

Part no. rhd-A2464300929

Vacuum Pipe Mercedes W176 W246 Line Hose Brake Booster Servo A2464300929

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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Mercedes SLK R171 Brake Servo Brake Master Cylinder Booster A1714300330

-40%

Part no. rhd-A1714300330

Mercedes SLK R171 Brake Servo Brake Master Cylinder Booster A1714300330

Promo price

£47.95

£28.77

Free delivery: Feb 25

If paid before 14:00

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Audi TT 8N 1.8T Brake Servo Booster Master Cylinder Unit 8N2614105

-15%

Part no. 8N2614105

Audi TT 8N 1.8T Brake Servo Booster Master Cylinder Unit 8N2614105

Promo price

£37.95

£32.26

Free delivery: Feb 25

If paid before 14:00

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Mini Cooper D R55 R56 W16 Diesel Power Brake Vacuum Pipe Hose 2753129

-40%

Part no. 2753129

Mini Cooper D R55 R56 W16 Diesel Power Brake Vacuum Pipe Hose 2753129

Promo price

£28.95

£17.37

Free delivery: Feb 25

If paid before 14:00

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BMW F45 X1 F48 Brake Servo Unit Master Cylinder 6872076 Automatic

-40%

Part no. 6873440

BMW F45 X1 F48 Brake Servo Unit Master Cylinder 6872076 Automatic

Promo price

£42.95

£25.77

Free delivery: Feb 25

If paid before 14:00

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Mercedes SLK R171 Brake Servo Brake Master Cylinder Booster A1714300130

-40%

Part no. rhd-A1714300130

Mercedes SLK R171 Brake Servo Brake Master Cylinder Booster A1714300130

Promo price

£47.95

£28.77

Free delivery: Feb 25

If paid before 14:00

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BMW F01 F02 Brake Servo Unit Master Cylinder 6790454 6786586 6782289

-40%

Part no. 6790454

BMW F01 F02 Brake Servo Unit Master Cylinder 6790454 6786586 6782289

Promo price

£32.95

£19.77

Free delivery: Feb 25

If paid before 14:00

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Mercedes Vito W447 Brake Servo Booster Master Cylinder Module A4474300208

-15%

Part no. rhd-A4474300208

Mercedes Vito W447 Brake Servo Booster Master Cylinder Module A4474300208

Promo price

£47.95

£40.76

Free delivery: Feb 25

If paid before 14:00

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Audi A4 B8 A5 8T Brake Servo Booster Master Cylinder Module 8K0612103E

-15%

Part no. 8K0612103E-2

Audi A4 B8 A5 8T Brake Servo Booster Master Cylinder Module 8K0612103E

Promo price

£37.95

£32.26

Free delivery: Feb 25

If paid before 14:00

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Brake Servo BMW F40 F44 JCW Master Cylinder Brake Booster Unit 6883890

-40%

Part no. 6889231

Brake Servo BMW F40 F44 JCW Master Cylinder Brake Booster Unit 6883890

Promo price

£37.95

£22.77

Free delivery: Feb 25

If paid before 14:00

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Mercedes W213 S213 Pressure Sensor Brake Booster Vacuum Servo A0009051001

-5%

Part no. A0009051001

Mercedes W213 S213 Pressure Sensor Brake Booster Vacuum Servo A0009051001

Promo price

£13.95

£13.25

Free delivery: Feb 25

If paid before 14:00

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Mercedes SLK R171 Brake Servo Brake Master Cylinder Booster A0054306430

-40%

Part no. rhd-A0054306430

Mercedes SLK R171 Brake Servo Brake Master Cylinder Booster A0054306430

Promo price

£37.95

£22.77

Free delivery: Feb 25

If paid before 14:00

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Brake Servo Unit Mini F55 F56 F57 Braking Unit Master Cylinder 6854640

-15%

Part no. 6854640-2

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Brake boosters and force regulators for optimal pressure distribution

Brake boosters and force regulators for optimal pressure distribution

Optimal servos and braking force correctors

Brake servo and brake boosters are key components of the braking system, supporting its efficiency and improving driving safety. A brake booster increases braking power, reducing driver effort, while a brake booster optimizes the distribution of force across the vehicle's axles, preventing wheel lockup. At Global Parts, you'll find a wide selection of used car parts , including brake boosters and brake boosters, ideal for BMW , Audi , Mercedes , Volkswagen , Mini , and more .

What are servos and brake force correctors – definition and principle of operation

A brake booster (vacuum booster) is a component of a brake assist system that uses pressure differential (usually vacuum generated by the engine or a vacuum pump) to increase the force applied to the brake master cylinder. In practice, this means the driver can generate up to 3–5 times more braking power with the same pedal pressure. Standard servos range in diameter from 7 to 11 inches, which directly affects the power assist. The brake force regulator (rear axle pressure regulator) dynamically adjusts rear brake pressure based on vehicle load. In vehicles without electronic EBD, it operates mechanically or hydraulically, limiting pressure on the rear wheels during heavy braking. This maintains directional stability and traction. In modern designs (e.g. in the BMW 3 Series, Audi A4 or Volkswagen Passat models), the function of the classic equalizer is often supported by the ABS/EBD system, but the controller itself is still responsible for the basic calibration of the braking force distribution.

What are the functions of servos and braking force correctors ?

Servos and brake force regulators play important roles in the braking system:

  • Increased braking power – The servo increases the pressure on the brake pedal, which facilitates effective braking.
  • Optimised brake force distribution – Brake force regulator prevents the rear wheels from locking, especially in low grip conditions.
  • Improved driving comfort – Thanks to the smooth operation of the braking system, driving becomes more comfortable and safe.

Technical parameters and compatibility with the braking system

In practice, the compatibility of the servo and the brake force corrector depends on several technical parameters:

  • servo diameter (e.g. 8", 9", 10"),
  • type of attachment to the front bulkhead,
  • length of the pin cooperating with the brake master cylinder,
  • pump type (1- or 2-circuit),
  • type of system (ABS / ABS + EBD / without ABS).

Example operating parameters

ElementFunctionTypical parametersImpact on safety
Brake servoPressure force supportVacuum 0.6–0.9 bar, diameter 7–11"Shortening the braking distance by up to several meters at 100 km/h
Brake force correctorRear axle pressure adjustmentProportional pressure reduction with load increaseTraction stability and slip limitation

Correct matching of these components to the vehicle model directly affects braking efficiency, even wear of pads and discs, and optimal operation of the entire hydraulic system.

Why is it worth taking care of servos and braking force correctors ?

Malfunctioning brake boosters and regulators can lead to reduced braking performance and increased road safety. Typical symptoms include:

  • Hard brake pedal – May indicate a brake booster failure.
  • Uneven braking – Problems with the brake booster can cause excessive braking on one axle.
  • Noises when braking – A damaged servo or equalizer can produce unusual noises. If you need a replacement, you'll find the right used car parts at Global Parts that will restore full efficiency to your braking system.

Step-by-step procedure for system operation during braking

  1. The driver presses the brake pedal.
  2. The servo uses vacuum to increase the pressure on the brake master cylinder.
  3. The pump generates hydraulic pressure in the brake lines.
  4. The brake force regulator regulates the pressure ratio between the front and rear axles.
  5. The calipers press the pads against the discs, generating friction and reducing the vehicle's speed. In a properly functioning system, the braking force distribution is on average around 60-70% front / 30-40% rear, which ensures stability and optimal use of tire grip.

How to choose the right servos and braking force correctors ?

When choosing servos and brake force correctors, there are several key aspects to consider:

  • Vehicle-specific fit – Every braking system has its own specific technical requirements. At Global Parts, you'll find brake boosters and brake boosters perfectly matched to BMW , Audi , Mercedes , Volkswagen , Mini , and more .
  • Technical condition – Used parts should be free from leaks, mechanical damage and pneumatic system defects.
  • Brake System Compatibility – Make sure the components you choose are compatible with your vehicle's design and specifications.

Fit, OEM, VIN and integration with other components

The selection of a brake servo and brake booster should take into account design compatibility with the brake master cylinder, brake lines, and ABS system. In practice, matching is based on the vehicle's model, year, engine version, and VIN. These elements work directly with:

  • brake pump,
  • brake fluid reservoir,
  • ABS/ESP module,
  • calipers and brake cylinders. Proper compatibility ensures not only safety, but also savings in operating costs – proper pressure distribution reduces uneven wear of friction elements and improves the durability of the entire system.

Why is it worth choosing used servos and braking force correctors ?

Used car parts , such as used servos and brake force correctors , is a practical solution that allows you to save money while maintaining high quality. By choosing used braking system components, you gain:

  • Lower costs – Used components are much cheaper than new ones, but offer equally high quality.
  • Ecology – Recycling parts supports environmental protection and reduces waste.
  • A wide range – In our store you will find used servos and braking force regulators for the most popular car brands.

How to take care of servos and braking force correctors ?

To ensure that servos and brake force correctors function reliably for a long time, it is worth following a few rules:

  • Regular inspections – Check the condition of braking system components during periodic technical inspections.
  • Maintain proper brake fluid level – Low fluid levels can damage the servo and other components.
  • Respond to symptoms of malfunction – Noises, uneven braking or problems with the brake pedal are signals that faulty parts need to be replaced. If replacement is necessary, Global Parts has the right used car parts to restore the effectiveness and reliability of your braking system.

FAQ – Frequently asked questions about servos and brake force regulators

QuestionAnswer
What is a brake booster?A servo is a vacuum amplifier that increases the pressure on the brake master cylinder. This allows the driver to brake effectively with less effort.
What is a brake force regulator?The equalizer is a pressure regulator in the rear circuit that adjusts the braking force to the vehicle load and prevents the rear axle from locking.
How does brake booster work?The system uses the pressure difference (vacuum approx. 0.6–0.9 bar) to increase the pressure transmitted to the brake master cylinder.
Does the servo work with the ABS system?Yes. The servo assists in generating pressure, and the ABS/EBD system electronically controls its distribution between the wheels.
What are the symptoms of a faulty servo?The most common symptom is a hard brake pedal and increased force required to stop the vehicle.
Why is a brake booster important?It is responsible for the vehicle's stability during braking, especially during sudden stops and with changing vehicle loads.
How to choose the right servo for your car?Please take into account the model, year, engine version and compatibility with the brake master cylinder and ABS system.

Summary: Servos and Brake Power Regulators at the Global Parts Automotive Store

Brake boosters and brake boosters are essential components of the braking system, increasing braking efficiency and precision. By maintaining their technical condition, you can improve driving comfort and safety. The Global Parts automotive store invites you to browse our wide selection of original used car parts . Whether you're looking for car parts for BMW , Audi , Volkswagen , Mercedes, Mini , and more, you'll find them at competitive prices. We strive to ensure every customer finds the right parts for their car, and if you have any questions or concerns about selecting the right components, we're happy to help! Please contact us – we're here to help! For more information and interesting facts, visit our automotive blog .

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