What are brake boosters and brake force regulators used for?

Brake boosters and brake force regulators are used to improve braking force and stability under various driving and load conditions. The booster reduces the pressure required on the pedal, while the regulator limits excessive pressure on the rear axle. Without these components, the system may operate less precisely, and the driver will feel greater pedal resistance or poorer braking balance.

What role does the vacuum booster play in the braking system?

The vacuum booster is an assembly that works with the brake pedal and master cylinder, using pressure differences to increase the force transmitted to the hydraulic system. In addition to the diaphragm itself, it includes a control valve, working chambers, and a pushrod. Its efficiency affects not only the comfort of pedal pressure but also the rapid response of the entire system during braking.

How to choose a brake booster and brake force regulator for a car?

When choosing, it is worth comparing the OEM number, interchangeable numbers, mounting type, and the type of cooperating master cylinder. The body version, engine, and presence of ABS or EBD also matter. In practice, it is safest to confirm compatibility by VIN and compare the part with the old component.

What symptoms indicate a problem with the brake booster or brake force regulator?

Typical symptoms include a hard brake pedal, delayed system response, uneven braking, and a change in car behavior during heavy deceleration. In some cases, there is also a hissing of air or a noticeable leak in the vacuum system. A regulator may show symptoms in the form of too strong or too weak rear-axle braking.

What cooperating elements should be paid attention to during installation?

During installation, check the condition of the vacuum line, the tightness of connections, the setting of the pushrod, and compatibility with the master cylinder. It is also worth assessing the condition of the brake fluid and the patency of the lines leading to other system components. If the car uses advanced braking electronics, correct cooperation with the control module is also important.

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

£23.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6788042

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

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6759450

BMW 1 3 Series E81 E87 E88 E90 E91 E92 LCI Brake Servo Unit Master Cylinder

£23.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-7577337

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

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-6798419

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

£18.95

Free delivery: Aug 04

If paid before 14:00

Part no. 7620923

BMW F10 F20 F30 LCI Mini F56 Vacuum Brake Servo Non-Return Valve 7620923

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-6764126

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

£18.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-6761456-1

Mini Cooper One R50 R52 R53 Vacuum Pipe Brake Servo 6761456

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6851090

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

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-6778818

BMW 3 Series E90 E91 E92 E93 Brake Servo Unit Master Cylinder 6778818

£18.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-6759450-1

BMW 1 3 Series E81 E87 E88 E90 E91 E92 Brake Servo Unit Master Cylinder 6759450

£18.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6856290-1

BMW E90 LCI X1 E84 Z4 E89 Mini R55 R56 R60 Pressure Sensor Brake Servo 6856290

£28.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6774451

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

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. 8513331

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

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-6798425-1

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

£23.95

Free delivery: Aug 04

If paid before 14:00

Part no. 3450589-1

BMW X3 E83 Brake Servo Unit Master Cylinder 293403547061 3403547

£28.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-8678618

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

£18.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-6851096

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

£32.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-7547579

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

£18.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-7849876

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

£56.95

Free delivery: Aug 04

If paid before 14:00

Part no. 3450589-6

BMW X3 E83 Brake Servo Unit Master Cylinder Reservoir Tank 3453259

£35.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6798423

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

£32.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6796726

Servo Cylinder BMW F10 F11 Brake Booster Master Unit 6796726

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6851099

Brake Servo BMW F30 F31 F32 F33 Unit Master Cylinder 6851099 4081079

£28.95

Free delivery: Aug 04

If paid before 14:00

Part no. 3450200

BMW X3 Series E83 Brake Servo Unit Master Cylinder 3450200 Automatic

£32.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6873440

BMW F45 X1 F48 Brake Servo Unit Master Cylinder 6872076 Automatic

£42.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6889231

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

£37.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6782289

BMW F10 F11 F13 F01 Brake Servo Fluid Expansion Tank Bottle Reservoir 6782289

£18.95

Free delivery: Aug 04

If paid before 14:00

Part no. RHD-6873432

BMW F45 F46 Brake Servo Booster Unit Master Cylinder 6872077

£23.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6889070

BMW X1 F48 Brake Servo Booster Unit Master Cylinder 6889070

£37.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6785916

BMW Z4 E89 Roadster Cabrio Brake Servo Unit Master Cylinder 6785916

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-6799928

BMW i3 I01 Hybrid Electric Brake Booster Servo Unit Master Cylinder 6799928

£56.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-7598231

BMW 5 7 Series F01 LCI N57N F10 F11 N47N Vacuum Hose Line Pipe Servo Brake

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6786685-1

BMW F01 F02 F07 GT Brake Servo Booster Master Cylinder Unit Container 6786685

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. 7846664

Brake Servo BMW F10 M5 F13 F12 M6 Unit Master Cylinder Booster 2284395

£94.95

Free delivery: Aug 5 – 12

If paid before 14:00

Part no. 6786685

BMW F01 F02 F07 GT Brake Servo Booster Master Cylinder Unit Container 6786685

£18.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6874524

Brake Servo BMW G30 G31 Master Cylinder Brake Booster Unit Module 6861210

£66.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6871456

Brake Servo BMW X3 F25 Unit Master Cylinder Booster Diesel 6871456

£42.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6872071

BMW 1 F40 Brake Servo Unit 6872071 6873436

£18.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6797470

BMW X3 F25 X4 F26 Brake Servo Braking Unit Master Cylinder Booster 6850495

£37.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6857914-1

BMW F46 Brake Booster Servo Master Cylinder Expansion Tank 6857914

£42.95

Free delivery: Aug 04

If paid before 14:00

Part no. 8092745

Brake Servo BMW X3 G01 X4 G02 Unit Master Cylinder Booster Petrol 8074223

£70.95

Free delivery: Aug 04

If paid before 14:00

Part no. RHD-7601022-1

BMW X3 F25 X4 F26 Pipe Line Hose Brake Servo Unit 7601022

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-4081077-1

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

£23.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-8605126

Vacuum Pipe BMW G30 G11 G14 G32 GT Brake System Servo Brake Buster Line 8605126

£42.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6889796

Brake Servo BMW G20 320d Diesel B47D Master Cylinder Reservoir 6889796

£94.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6869016

BMW F40 Brake Servo Unit Master Cylinder Brake Booster 6854643

£66.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6875609

BMW F45 Brake Servo Booster Master Cylinder Module 6875609

£37.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6855846

BMW 3 Series F30 LCI 330e Hybrid 3 Brake Servo Unit Master Cylinder 6855846

£66.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-7601022

Vacuum Pipe BMW X3 F25 X4 F26 Line Hose Brake Servo Unit 7601022

£18.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6799428

BMW Z4 E89 Roadster Cabrio Brake Servo Unit Master Cylinder 6799428

£51.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6875180

BMW G01 G02 Brake Servo Booster Master Cylinder Module Unit 6875180

£142.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-6872134

Brake Servo BMW F32 Brake Booster Master Cylinder Reservoir 6872134

£75.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6857870

Brake Servo BMW X3 F25 Booster Unit Master Cylinder Control Unit 6857870

£75.95

Free delivery: Aug 04

If paid before 14:00

Part no. RHD-6871459

BMW X3 F25 Brake Servo Master Cylinder Booster Unit Diesel 6871459

£85.95

Free delivery: Aug 04

If paid before 14:00

Part no. RHD-6854352

BMW X3 F25 X4 F26 Brake Servo Master Cylinder Booster 6854352

£32.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6879422

BMW G20 Brake Servo Master Cylinder Tank Reservoir Booster 6879422

£75.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6892203

BMW G20 Brake Servo M Sport Brake Master Cylinder Booster Reservoir 6892203

£32.95

Free delivery: Aug 04

If paid before 14:00

Part no. 8074224

BMW G32 Brake Servo Booster Master Cylinder Braking Unit 8074224

£104.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6869016-2

Brake Servo BMW F40 Mini F56 F57 JCW Master Cylinder Brake Booster Unit 6854643

£23.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6882812-1

BMW X1 F48 Brake Servo Unit Master Cylinder Brake Booster Unit 6882812

£66.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6875172

BMW X3 G01 X4 G02 Brake Servo Unit Master Cylinder Booster Petrol 6881094

£80.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6866164

Brake Servo BMW F45 F46 Brake Booster Master Cylinder Reservoir 6866164

£23.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6796727

BMW F10 Brake Servo Unit 6790455 34336790455

£37.95

Free delivery: Aug 04

If paid before 14:00

Part no. 8605126-1

Vacuum Pipe BMW G30 G11 G14 G32 GT Brake System Servo Brake Buster Line 8605126

£28.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6857914

Brake Booster BMW F46 Servo Brake Master Cylinder Expansion Tank 6857914

£28.95

Free delivery: Aug 04

If paid before 14:00

Part no. RHD-5B77C56

BMW F70 F74 Gran Coupé Brake Servo Booster Power Brake 5B77C56

£598.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6799387

BMW i3 I01 Bracket Brake Pipe Line Left N/S Servo 6799387

£18.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6873444

BMW G11 G12 G30 Brake Servo Brake Booster Master Cylinder Unit Reservoir 6873444

£142.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6872071-1

BMW F40 Brake Servo Master Cylinder Unit 6872071

£18.95

Free delivery: Aug 04

If paid before 14:00

Part no. 8572037

BMW 5 Series F10 F11 LCI B47 Vacuum Servo Hose Pipe Line 8572037

£28.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6881616

Brake Servo BMW X3 G01 X4 G02 Unit Master Cylinder Booster Petrol 6881616

£70.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6857869

Brake Servo BMW X3 F25 Booster Unit Master Cylinder Control Unit 6857869

£42.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6879650

Brake Servo Unit BMW F30 LCI 330e Brake Master Cylinder Hybrid 6879650

£47.95

Free delivery: Aug 04

If paid before 14:00

Part no. 7602557

Vacuum Pipe BMW X3 F25 X4 F26 Line Hose Brake Servo Unit Pipe 7602557

£18.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6769328

BMW 1 3 X1 Series E81 E82 E84 E87 E88 E90 E91 E92 E93 Bulkhead Seal 6769328

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. 6972207

BMW X5 E70 Bulkhead Seal Gasket 6972207

£13.95

Free delivery: Aug 04

If paid before 14:00

Part no. rhd-6788040

BMW 1 3 Series E81 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6788040

Product currently unavailable

Part no. rhd-6785645

BMW 1 3 Series E81 E87 E90 E91 E92 Brake Servo Unit Master Cylinder 6785645

Product currently unavailable

Part no. rhd-6785645-1

BMW 1 3 Series E81 E87 E90 E91 Brake Servo Unit Master Cylinder 6785645

Product currently unavailable

Part no. rhd-6775932

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

Product currently unavailable

Part no. rhd-6785649-1

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

Product currently unavailable

Part no. rhd-6785647

BMW 1 3 Series E81 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6785647

Product currently unavailable

Part no. 6765937-1

BMW E60 E61 E63 E64 Brake Booster Master Cylinder Unit 6765937

Product currently unavailable

Part no. rhd-6764126-1

BMW 1 3 Series E81 E87 E90 E91 E92 Brake Servo Unit Master Cylinder 6764126

Product currently unavailable

Part no. 6774622

BMW X5 E70 Brake Brakes Master Cylinder Servo Booster Unit 6774622

Product currently unavailable

Part no. 6779742

BMW E60 E61 E63 E64 Brake Booster Master Cylinder Unit 6765937

Product currently unavailable

Part no. rhd-6785649

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

Product currently unavailable

Part no. 6791410

BMW X5 X6 E70 E71 Brake Servo Unit Master Cylinder 6791410 6791409

Product currently unavailable

Part no. 6757706

BMW X5 E53 Power Brake Servo Unit Master Cylinder 6757706

Product currently unavailable

Part no. rhd-6798419-1

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

Product currently unavailable

Part no. rhd-6776943

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

Product currently unavailable

Part no. 3450589

Brake Servo BMW X3 E83 Unit Master Cylinder 3403547

Product currently unavailable

Part no. rhd-6785647-1

BMW 1 3 Series 1 E81 E90 E91 E92 LCI Brake Servo Unit Master Cylinder 6785647

Product currently unavailable

Part no. rhd-6775932-1

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

Product currently unavailable

Part no. 6786556-1

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

Product currently unavailable

Part no. 6778826-1

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

Product currently unavailable

Part no. rhd-6778818-1

BMW 3 Series E90 E91 E92 E93 1 Brake Servo Unit Master Cylinder 6778818

Product currently unavailable

Part no. rhd-4081077

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

Product currently unavailable

Showing 1-99 of 184 products

Brake boosters and force regulators for optimal pressure distribution

Optimal servos and braking force correctors

Brake boosters and brake force regulators are key components of the braking system that support its efficiency and improve driving safety. The brake booster increases braking force, reducing the effort required from the driver, while the brake force regulator optimizes the distribution of force to the vehicle's axles, preventing wheel lock-up. In the Global Parts automotive store, you will find a wide selection of used car parts, including brake boosters and brake force regulators, ideal for brands such as BMW, Audi, Mercedes, Volkswagen, Mini, and others.

Construction and purpose of brake boosters and brake force regulators – definition and operating principle

A brake booster (vacuum booster) is a component of the brake assist system that uses pressure differences—most commonly vacuum generated by the engine or a vacuum pump—to increase the pressure applied to the brake master cylinder. In practice, this means the driver can generate 3–5 times more braking force with the same pedal pressure. Standard boosters have a diameter of 7 to 11 inches, which directly affects the level of assistance. A brake force regulator is a rear-axle pressure regulator responsible for dynamically adjusting pressure in the rear circuit based on the vehicle's load. In vehicles without an electronic EBD system, it operates mechanically or hydraulically, limiting pressure to the rear wheels during sudden braking. This helps maintain driving stability and proper traction. In modern designs, such as in BMW 3 Series, Audi A4, or Volkswagen Passat models, the function of a classic regulator is often supported by an ABS/EBD system, although the regulator itself remains responsible for the base calibration of braking force distribution.

Characteristics of brake boosters and brake force regulators

Brake boosters and brake force regulators are components installed within the braking system, usually between the brake pedal and the master cylinder or in the hydraulic circuit of the rear axle. A booster typically consists of a housing, a diaphragm, a control valve, and a pushrod, while a regulator consists of a body, pressure channels, and a regulating element. These parts serve to reduce the force required on the pedal and to maintain the correct front-to-rear braking proportions.

What functions do brake boosters and brake force regulators perform?

Brake boosters and brake force regulators play essential roles in the braking system:

Increasing braking force – The booster amplifies the pressure on the brake pedal, which facilitates effective braking.
Optimizing braking force distribution – The brake force regulator prevents rear-axle wheel lock-up, especially in low-traction conditions.
Improving driving comfort – Thanks to the smooth operation of the braking system, driving becomes more comfortable and safer.

Comparison of construction and application of components

Component	Main function	Cooperating area	What to check before selection
Brake booster	Assisting pressure on the master cylinder	Brake pedal, master cylinder, vacuum line	Diameter, mounting type, pushrod length, compatibility with the master cylinder
Brake force regulator	Regulating pressure in the rear axle circuit	Brake lines, rear axle, suspension components	Line layout, adjustment method, body and load version
Set with master cylinder	Transmitting and amplifying force and generating pressure	Booster, master cylinder, fluid reservoir	OEM number, mounting spacing, circuit type, and equipment compatibility

Technical parameters and compatibility with the braking system

In practice, the compatibility of a brake booster and brake force regulator with the vehicle depends on several technical parameters:

booster diameter (e.g., 8", 9", 10"),
type of mounting to the firewall,
length of the pushrod interacting with the master cylinder,
type of master cylinder (single- or dual-circuit),
type of system (ABS / ABS + EBD / non-ABS).

Example operating parameters

Component	Function	Typical parameters	Impact on safety
Brake booster	Assisting pressure force	Vacuum 0.6–0.9 bar, diameter 7–11"	Shortening braking distance by several meters at 100 km/h
Brake force regulator	Rear axle pressure regulation	Proportional pressure reduction as load increases	Driving stability and slip limitation

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

Selection by OEM number and system version

The selection of these parts should take into account the OEM part number, interchangeable numbers, body type, and vehicle equipment. The brake booster must match in diameter, mounting point, and pushrod length, while the regulator must match the routing of the lines and the adjustment method. For parts such as a BMW E46 brake booster, it is also worth comparing the master cylinder version and the presence of cooperating systems, such as brake master cylinders.

Why is it worth taking care of brake boosters and brake force regulators?

Malfunction of brake boosters and brake force regulators can lead to reduced braking efficiency and increased risk on the road. Typical symptoms of failure include:

Hard brake pedal – May indicate a failure of the brake booster.
Uneven braking – Problems with the brake force regulator can cause excessive braking on one axle.
Noises during braking – A damaged booster or regulator can generate unusual sounds. If replacement is necessary, at Global Parts you will find suitable used car parts that will restore the full efficiency of the braking system.

Braking system operation procedure – step by step

The driver presses the brake pedal.
The booster uses vacuum to increase the pressure on the master cylinder.
The master cylinder generates hydraulic pressure in the brake lines.
The brake force regulator adjusts the pressure proportion between the front and rear axles.
Calipers press the pads against the discs, generating friction and reducing vehicle speed. In a properly functioning system, the braking force distribution is on average about 60–70% front / 30–40% rear, which ensures stability and optimal use of tire grip.

Cooperating elements and typical inspection points

The vacuum port, booster hose, pedal pushrod, and brake hoses, lines, and connectors are elements that directly affect the proper operation of assistance and pressure regulation. The booster seal is a detail responsible for the tightness of the connection and maintaining the proper operating conditions of the vacuum system. If you are looking for a component such as a booster seal, check the seating diameter, the condition of the contact surface, and compatibility with the booster housing.

How to choose the right brake boosters and brake force regulators?

When choosing brake boosters and brake force regulators, pay attention to several key aspects:

Compatibility with the vehicle model – Every braking system has its specific technical requirements. At Global Parts, you will find brake boosters and brake force regulators perfectly matched to BMW, Audi, Mercedes, Volkswagen, Mini, and others.
Technical condition – Used parts should be free from leaks, mechanical damage, and defects in pneumatic systems.
Compatibility with the braking system – Ensure that the selected components are consistent with the design and specification of your vehicle.

Matching, OEM, VIN, and integration with other components

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

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

Practical selection of parts for specific car versions

When looking for parts for a specific model, for example, a BMW E46, it is good to verify the OEM number, booster diameter, line layout, and how it works with the ABS and ESP system. Such verification is especially important when the car was produced in several engine variants and with different braking equipment. Additionally, the guide How to extend the life of used car parts? may be helpful, as it provides tips on how to assess the condition and usage of components.

Why is it worth choosing used brake boosters and brake force regulators?

Used car parts, such as brake boosters and brake force regulators, are a practical solution that allows for savings while maintaining high quality. By choosing used braking system components, you gain:

Lower costs – Used components are significantly cheaper than new ones but offer equally high quality.
Ecology – Recycling parts supports environmental protection and reduces waste.
Wide offer – In our store, you will find used brake boosters and brake force regulators for many car brands.

How to take care of brake boosters and brake force regulators?

To ensure brake boosters and brake force regulators work 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 the correct brake fluid level – Low fluid levels can lead to damage to the booster and other components.
Respond to symptoms of failure – Noises, uneven braking, or problems with the brake pedal are signals that faulty parts should be replaced.

FAQ

Question	Answer
What is the construction and purpose of brake boosters and brake force regulators?	Brake boosters and brake force regulators are braking system components installed at the master cylinder and in the pressure regulation circuit, respectively. A booster typically consists of a housing, diaphragm, valve, and pushrod, while a regulator consists of a body and a mechanism regulating pressure flow. Their task is to increase braking efficiency and maintain proper force distribution between the vehicle's axles.
What are brake boosters and brake force regulators used for?	Brake boosters and brake force regulators are used to improve braking force and stability under various driving and load conditions. The booster reduces the pressure required on the pedal, while the regulator limits excessive pressure on the rear axle. Without these components, the system may operate less precisely, and the driver will feel greater pedal resistance or poorer braking balance.
What role does the vacuum booster play in the braking system?	The vacuum booster is an assembly that works with the brake pedal and master cylinder, using pressure differences to increase the force transmitted to the hydraulic system. In addition to the diaphragm itself, it includes a control valve, working chambers, and a pushrod. Its efficiency affects not only the comfort of pedal pressure but also the rapid response of the entire system during braking.
How to choose a brake booster and brake force regulator for a car?	When choosing, it is worth comparing the OEM number, interchangeable numbers, mounting type, and the type of cooperating master cylinder. The body version, engine, and presence of ABS or EBD also matter. In practice, it is safest to confirm compatibility by VIN and compare the part with the old component.
What symptoms indicate a problem with the brake booster or brake force regulator?	Typical symptoms include a hard brake pedal, delayed system response, uneven braking, and a change in car behavior during heavy deceleration. In some cases, there is also a hissing of air or a noticeable leak in the vacuum system. A regulator may show symptoms in the form of too strong or too weak rear-axle braking.
What cooperating elements should be paid attention to during installation?	During installation, check the condition of the vacuum line, the tightness of connections, the setting of the pushrod, and compatibility with the master cylinder. It is also worth assessing the condition of the brake fluid and the patency of the lines leading to other system components. If the car uses advanced braking electronics, correct cooperation with the control module is also important.

Summary: brake boosters and brake force regulators at the Global Parts automotive store

Brake boosters and brake force regulators are essential braking system components that increase braking efficiency and precision. The Global Parts offer includes used components matched to many versions of cars from brands such as BMW, Mercedes, Mini, and others, taking into account data such as brand, condition, OEM part number, and interchangeable numbers. We invite you to contact us – we are here to help! For more information and interesting facts, we also invite you to visit our automotive blog.

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