Servos and brake force correctors
More informationAt 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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Part no. rhd-6785649
BMW 1 3 Series E81 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6785649
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Part no. rhd-6778818
BMW 3 Series E90 E91 E92 E93 Brake Servo Unit Master Cylinder 6778818
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Part no. rhd-6759450-1
BMW 1 3 Series E81 E87 E88 E90 E91 E92 Brake Servo Unit Master Cylinder 6759450
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Part no. rhd-6776943
BMW 1 3 Series E81 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6776943
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Part no. rhd-6785647-1
BMW 1 3 Series 1 E81 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6785647
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Part no. rhd-6778818-1
BMW 3 Series E90 E91 E92 E93 1 Brake Servo Unit Master Cylinder 6778818
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Part no. 6774451
BMW E87 E90 E92 Brake Master Cylinder Reservoir Cap Warning Switch 6774451
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Part no. 6756237
Mini Cooper One R50 R52 R53 Brake Master Cylinder Reservoir Tank Cap 6756237
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Part no. 6786556
BMW 5 6 SERIES E60 E61 E63 E64 Brake Servo Unit Master Cylinder 6786556
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Part no. 6765936-1
BMW E60 E61 M54 Brake Servo Unit Cylinder Assembly Bracket 6765936
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Part no. 3450589-2
BMW X3 E83 Brake Servo Booster Unit Master Cylinder 3450200
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Part no. rhd-6791063
BMW E81 E82 E87 LCI E88 123d Brake Servo Unit Master Cylinder 6791063
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Part no. rhd-2283396
BMW 3 Series E90 E92 E93 M3 Brake Servo Unit Master Cylinder 2283396
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Part no. 6779682-2
BMW Z4 Series E85 Roadster Servo Brake Unit Master Cylinder 6751589 6785666
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Part no. 6779682
BMW 3 Series E46 Brake Servo Unit Master Cylinder 6750798 6785666 6753008
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Part no. 6784972
BMW E60 E61 M54 Brake Servo Unit Cylinder Assembly Bracket 6765936
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Part no. 6779682-1
BMW 3 Z4 Series E46 E85 E86 Roadster Servo Brake Unit Master Cylinder 6757273
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Part no. 3450589-6
BMW X3 E83 Brake Servo Unit Master Cylinder Reservoir Tank 3453259
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Part no. 6778826
BMW 5 6 Series E60 E61 E63 E64 Brake Servo Unit Master Cylinder 6778826
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Part no. rhd-6778818-2
Brake Servo BMW E90 E91 E92 E93 Unit Master Cylinder 6778818
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Part no. 3450589-5
BMW X3 Series E83 Brake Servo Unit Master Cylinder Reservoir Tank 3453259
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Part no. 6851099
Brake Servo BMW F30 F31 F32 F33 Unit Master Cylinder 6851099 4081079
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Part no. 6756233
Mini Cooper One R50 Brake Master Cylinder Pump 6756233
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Part no. 6769623
BMW 3 Series E90 E91 Vacuum Pipe Hose Brake Servo Unit Master Cylinder 6769623
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Part no. 3450200
BMW X3 Series E83 Brake Servo Unit Master Cylinder 3450200 Automatic
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Part no. rhd-6779721
BMW 1 3 Series E81 E90 E91 E92 Brake Servo Unit Master Cylinder 6779721
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Part no. rhd-6785647-2
BMW E81 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6785647
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Part no. 6778821
BMW Z4 E85 Roadster Servo Brake Unit Master Cylinder 6778821
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Part no. rhd-6779718
BMW 1 3 Series E81 E87 E88 E90 E91 E92 Brake Servo Unit Master Cylinder 6779718
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Part no. rhd-6763409
BMW E60 E61 520i 525i 530i M54 Brake Servo Vacuum Hose Pipe Line 6763409 7525185
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Part no. rhd-6873432
BMW 2 Series F45 F46 Brake Brakes Master Cylinder Servo Booster Unit 6872077
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Part no. 6769850-1
BMW Z4 E85 Roadster Servo Brake Unit Master Cylinder 6769850
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Part no. 6764117
BMW 1 3 Series E81 E82 E87 E90 E91 E92 E93 Expansion Tank Brake Fluid Reservoir
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Part no. 6786750
BMW Z4 E89 Roadster Cabrio Brake Servo Unit Master Cylinder 6785916
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Part no. 6769086
BMW E82 E88 E90 N54 135i 335i Vacuum Servo Hose Pipe Pressure 6769086
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Part no. 6779742-2
Brake Servo BMW E60 E61 E63 E64 Brake Booster Master Cylinder Unit 6779742
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Part no. rhd-6779721-1
BMW 1 3 Series E81 E90 E91 E92 Brake Servo Unit Master Cylinder 6779721
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Part no. rhd-6775932-3
Brake Servo BMW E81 E87 E90 E91 E92 LCI Brake Unit Master Cylinder 6775932
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Part no. 6759932
BMW Z4 Series E85 Brake Servo Vacuum Hose Pipe 6759932
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Part no. 6779742-1
Brake Servo BMW E60 E61 E63 E64 Brake Booster Master Cylinder Unit 6778826
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Part no. 6753817
BMW 7 Series E65 E66 Power Braking Servo Unit Master Cylinder 6753817
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Part no. 2283606
BMW 3 Series E90 E92 E93 LCI M3 Vacuum Hose Pipe Line Brake Servo 2283606
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Part no. 6792956
BMW 5 Series F10 F11 Brake Servo Unit 6792956 6796729
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Part no. 6874524
Brake Servo BMW G30 G31 Master Cylinder Brake Booster Unit Module 6861210
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Part no. 6869016-1
Brake Servo BMW F40 Mini F56 F57 JCW Master Cylinder Brake Booster Unit 6854643
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Part no. 6779738
BMW 7 Series E65 E66 730i M54 Brake Servo Unit Cylinder 6779738 6758184
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Part no. 1165679
BMW X5 Series E53 Power Brake Servo Unit Master Cylinder 34331165679 1165679
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Part no. RHD-1165057
BMW E39 M5 Brake Servo Booster Master Cylinder Lucas LSC 145T 1165057
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Part no. 3450589-4
BMW X3 Series E83 Brake Booster Servo Unit Tank Reservoir 3403547
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Part no. RHD-7601022-1
BMW X3 F25 X4 F26 Pipe Line Hose Brake Servo Unit 7601022
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Part no. 2454368
BMW E81 E87 E90 E91 E92 E93 Brake Servo Unit Master Cylinder 2454368
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Part no. 3450589-3
BMW X3 Series E83 Brake Servo Unit Master Cylinder 3450589 Manual
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Part no. 6889229
BMW X2 F39 Mini F60 Brake Servo Booster Master Cylinder Unit 6883889
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Part no. 6874526
BMW G30 Brake Servo Booster Master Cylinder Module 6874526
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Part no. rhd-1165542
BMW E38 Brake Servo Booster Master Cylinder Module 1165542
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Part no. 6889796
Brake Servo BMW G20 320d Diesel B47D Master Cylinder Reservoir 6889796
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Part no. rhd-6785665
BMW 3 Series E90 E91 E92 Brake Servo Master Cylinder Container 6785665
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Part no. rhd-2282194
BMW E46 M3 S54 Brake Servo Master Cylinder Booster Unit Module 2228986
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Part no. 2282765
BMW E60 M5 E63 M6 Brake Servo Unit Cylinder Master Cylinder 2282765
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Part no. 6882812
Brake Servo BMW X1 F48 Unit Master Cylinder Brake Booster Unit 6882812
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Part no. rhd-6751976
BMW E81 E90 E91 E92 Brake Booster Servo Unit Master Cylinder 6751976
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Part no. 7833212
BMW E46 M3 Shut Off Valve Pipe Hose Brake Servo Booster 7833212
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Part no. 6792954
Brake Servo BMW F10 F11 F13 Unit Master Cylinder Booster 6792954 6792956
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Part no. 5A96FD9
BMW I4 G26 Gran Coupe Brake Servo Booster Master Cylinder Module 5A7C677
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Part no. 6757706-1
Brake Servo BMW X5 E53 Booster Master Cylinder Control 6757706
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Part no. 6768359
BMW Z4 Series E85 E86 N52 Vacuum Pipe Hose Brake Servo 6768359
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Part no. rhd-7601022
Vacuum Pipe BMW X3 F25 X4 F26 Line Hose Brake Servo Unit 7601022
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Part no. RHD-6875610-2
Brake Servo BMW F46 F48 Brake Booster Master Cylinder Reservoir 6875610
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Part no. rhd-6759932
BMW Z4 Series E85 M54 Brake Servo Vacuum Hose Pipe Line 6759932
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Part no. 1162963-1
BMW 3 Series E36 1 Brake Master Cylinder Servo Booster Unit 1163472
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Part no. rhd-6758598
BMW 3 Series E46 Vacuum Pipe Hose Line Brake Servo Unit 6758598
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Part no. 8648866
BMW G32 Brake Servo Vacuum Pipe Hose Line Tube 8648866
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Part no. 6755278-1
BMW 3 Series E46 1 Brake Servo Unit Master Cylinder Expansion Tank 6755278
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Part no. 6868995
Brake Servo BMW F45 F46 B47 B48 Booster Unit Master Cylinder 6854645
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Part no. 6757118
BMW 3 Series E46 Brake Servo Unit Master Cylinder Expansion Tank 6757118
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Part no. 0204255096
Servo Fluid Tank Citroen Relay Peugeot Boxer Brake Servo Reservoir 0204255096
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Part no. 6755278
BMW 3 Series E46 Brake Servo Unit Master Cylinder Expansion Tank 6755278
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Part no. 8605126-1
Vacuum Pipe BMW G30 G11 G14 G32 GT Brake System Servo Brake Buster Line 8605126
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Part no. rhd-3404418
BMW X3 Series E83 E83N LCI Rubber Grommet Seal Gasket Water Brake Pipe 3404418
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Part no. 1162963
BMW 3 Series E36 Brake Master Cylinder Servo Unit 1163472
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Part no. 1164442
BMW 3 Series E46 Brake Servo Unit Master Cylinder Expansion Tank 1164442
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Part no. 6872071-1
BMW F40 Brake Servo Master Cylinder Unit 6872071
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Part no. RHD-1166013
BMW X5 E53 3.0i 4.4i 4.6is SAV Power Brake Servo Unit Elbow Hose 1166013
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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
| Element | Function | Typical parameters | Impact on safety |
|---|---|---|---|
| Brake servo | Pressure force support | Vacuum 0.6–0.9 bar, diameter 7–11" | Shortening the braking distance by up to several meters at 100 km/h |
| Brake force corrector | Rear axle pressure adjustment | Proportional pressure reduction with load increase | Traction 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
- The driver presses the brake pedal.
- The servo uses vacuum to increase the pressure on the brake master cylinder.
- The pump generates hydraulic pressure in the brake lines.
- The brake force regulator regulates the pressure ratio between the front and rear axles.
- 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
| Question | Answer |
|---|---|
| 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 .