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. A2024300014
Mercedes-Benz A W169 Brake Fluid Reservoir Screw Filler Tank Cap A2024300014
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Part no. 6784972
BMW E60 E61 M54 Brake Servo Unit Cylinder Assembly Bracket 6765936
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BMW Mini Cooper One R55 R56 R57 R60 Brake Servo Unit Master Cylinder 6785191
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Mini Cooper One R55 R56 R57 R60 Brake Servo Unit Master Cylinder 6785182
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BMW X3 E83 Brake Servo Unit Master Cylinder 293403547061 3403547
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BMW Mini One 1 R56 Brake Servo Unit Master Cylinder Expansion Tank 6770909
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BMW X3 Series E83 Brake Servo Unit Master Cylinder 3450200 Automatic
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BMW X3 E83 Brake Servo Booster Unit Master Cylinder 3450200
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BMW Z4 Series E85 Roadster Servo Brake Unit Master Cylinder 6751589 6785666
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Part no. 6757182
BMW Mini Cooper One R50 R53 Brake Servo Unit Master Cylinder DSC 6757182
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BMW 7 Series E65 E66 Power Braking Servo Unit Master Cylinder 6769213
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Part no. 6791410
BMW X5 X6 E70 E71 Brake Servo Unit Master Cylinder 6791410 6791409
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Part no. A0054304230
Mercedes-Benz A-Class W168 Brake Servo Master Cylinder A0054304230
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Part no. A2134301130
Brake Booster Mercedes X253 GLC 220d Master Cylinder Reservoir A2134301130
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Part no. 6796726
Servo Cylinder BMW F10 F11 Brake Booster Master Unit 6796726
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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. 6778826-1
BMW 5 6 Series E60 E61 E63 E64 Brake Servo Unit 6778826
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Part no. A0014300108
Brake Servo Mercedes W639 Brake Booster Unit Master Cylinder A0014300108
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Part no. 6759450
BMW 1 3 Series E81 E87 E88 E90 E91 E92 LCI Brake Servo Unit Master Cylinder
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Part no. 6770607
Mini Cooper One R55 R56 R57 Brake Master Cylinder Reservoir Tank Cap 6770607
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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. 6779742
BMW E60 E61 E63 E64 Brake Booster Master Cylinder Unit 6765937
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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. A0004300312
Mercedes-Benz E-Class S211 W211 Brake Servo Master Cylinder A0004300312
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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. 8R0612107D
Audi Q5 8R Brake Servo Booster Master Cylinder Braking Unit 8R0612107D
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Part no. 8R0612107B
Audi Q5 8R Brake Master Cylinder Servo 8R0612103D
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Part no. A4474310200
Mercedes Vito W447 Brake Servo Booster Master Cylinder Braking Unit A4474300208
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Part no. 6786556-1
BMW 5 6 Series E60 E61 E63 E64 Brake Servo Unit 6786556
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Part no. A1644280015
Mercedes W164 Brake Servo Unit Brake Cylinder Reservoir A1644280015
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Part no. 8K0612107C
Audi A4 B8 Brake Servo Booster Master Cylinder Unit 8K0612107C
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Part no. 6757706
BMW X5 E53 Power Brake Servo Unit Master Cylinder 6757706
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Part no. 8K0612107B
Audi A4 B8 Brake Servo Booster Master Cylinder Unit 8K0612107B
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Part no. 8E0612105P
Audi A4 B7 Brake Servo Brake Master Cylinder Booster ABS Unit 8E0612105P
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Part no. A0009058500
Mercedes W205 Pressure Sensor Brake Booster Vacuum Servo A0009058500
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Part no. 6770606
Mini Cooper R56 Brake Servo Unit Master Cylinder 6770606
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Part no. A2054301400-1
Brake Servo Mercedes W205 C238 Booster Master Cylinder Module A2134300430
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Part no. A0054304230-1
Mercedes-Benz W168 1 Brake Servo Master Cylinder A0054304230
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Part no. A1644310627
Mercedes ML W164 Brake Servo Brake Master Cylinder Booster Unit A1644301530
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Part no. A2124304829
Vacuum Pipe Mercedes W212 W218 OM642 Line Hose Brake Servo Unit A2124304829
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Part no. A2214302530
Mercedes W221 Brake Servo Brake Master Cylinder Booster Unit A2214302130
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Part no. 8200837097
Renault Trafic II Brake Servo Unit Master Cylinder Brake Booster Unit 8200837097
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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. A0025428418
Pressure Sensor Mercedes ML W164 R171 W203 W209 Brake Servo Sensor A0025428418
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Part no. 6778723-1
Mini Cooper R50 R52 1 Brake Servo Unit Master Cylinder Expansion Tank 6778723
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Part no. 2753129-1
Mini Cooper D R55 R56 W16 Diesel Power Brake Servo Vacuum Pipe Hose Line 2753129
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Part no. A2464300930-1
Mercedes W176 W246 Brake Servo Booster Expansion Tank Cover Cap A2464300330
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Part no. A0004308608
Mercedes Sprinter W901 W903 Brake Servo Booster Master Cylinder Unit A0004308608
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Part no. A0004300312-1
Mercedes W211 S211 Brake Servo Master Cylinder Brake Booster A0004300312
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Part no. 6757706-1
Brake Servo BMW X5 E53 Booster Master Cylinder Control 6757706
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Part no. 6796726-2
BMW F10 F11 Brake Servo Booster Master Cylinder Servo Braking Unit 6796726
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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. 8E0612107F
Audi A4 B7 Brake Servo Booster Master Cylinder 8E0612107F
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Part no. A6540703132
Mercedes W213 OM654 Diesel Vacuum Pipe Line Hose Brake Booster Servo A6540703132
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Part no. 5N2614105F
Audi Q3 8U 2.0 TDI Brake Servo Master Cylinder Unit 5N2614105F
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Part no. 6855846
BMW 3 Series F30 LCI 330e Hybrid 3 Brake Servo Unit Master Cylinder 6855846
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Part no. 8T0612107
Audi A8L 4H Brake Servo Booster Master Cylinder 8T0612107 4H0612103C
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Part no. 0204255096
Servo Fluid Tank Citroen Relay Peugeot Boxer Brake Servo Reservoir 0204255096
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Part no. 7593718
BMW Mini Cooper S R55 R56 LCI R60 N18 Power Brake Vacuum Pipe Hose 7593718
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Part no. 6759932
BMW Z4 Series E85 Brake Servo Vacuum Hose Pipe 6759932
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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. 6778821
BMW Z4 E85 Roadster Servo Brake Unit Master Cylinder 6778821
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Part no. A1644310427
Mercedes W164 Brake Servo Brake Master Cylinder Booster A1644301030
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Part no. 6756246
Mini Cooper S R52 R53 W11 Vacuum Pipe Hose Power Unit Brake Servo 6756246
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Part no. 6786685
BMW F01 F02 F07 GT Brake Servo Booster Master Cylinder Unit Container 6786685
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Part no. A4154200700
Brake Vacuum Hose Mercedes Citan W415 Servo Booster Line Pipe A4154200700
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Part no. 6863498-1
Mini Cooper R55 R56 R57 R60 Brake Servo Unit Master Cylinder 6863498
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Part no. GK212B195AB
Ford Transit Custom Brake Servo Booster Vacuum Sensor Unit GK212B195AB
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Part no. GK312B195CD
Ford Transit Mk8 Brake Booster Servo Unit Master Cylinder GK31-2B195-CD
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Part no. A1644310627-1
Mercedes ML W164 Brake Servo Brake Master Cylinder Booster Unit A1644301530
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Part no. BK212B195BE
Ford Transit 2.2 TDCi Brake Servo Power Booster Assist Master Cylinder
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Part no. 6785182-1
Mini Cooper One R55 R56 R57 R60 Brake Servo Unit Master Cylinder 6785182
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Part no. 8R0612103H
Audi Q7 4L Brake Servo Master Cylinder Vacuum Booster 8R0612103H
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Part no. 6854640-1
Mini Cooper One F55 F56 F57 Brake Servo Unit Master Cylinder 6854640
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Part no. 4014453
Mini Cooper One R50 R52 R53 Brake Servo Unit Brake Master Cylinder 4014453
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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. 7L8612105P
Audi Q7 4L Brake Servo Brake Master Cylinder Booster Unit 7L8612105P 7L8612101
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Part no. 51928238
Citroen Relay Fiat Ducato Brake Servo Booster Master Cylinder 51928238
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Part no. 6778723
BMW Mini One R50 R52 Brake Servo Unit Master Cylinder Expansion Tank 6778723
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Part no. A0004311727
Mercedes Vito Viano W639 Brake Servo Master Cylinder A0004311727
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Part no. 6889796
Brake Servo BMW G20 320d Diesel B47D Master Cylinder Reservoir 6889796
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Part no. A2054301400
Brake Servo Mercedes W205 C238 Booster Master Cylinder Module A2134300430
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Part no. 6Q1614105T
VW Volkswagen Polo 9N Seat Ibiza 3 Skoda Brake Servo Booster Unit 6Q1614105T
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Part no. 6790454
BMW F01 F02 Brake Servo Unit Master Cylinder 6790454 6786586 6782289
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Part no. A9104300100
Mercedes W907 Brake Servo Booster Master Cylinder Unit A9104300100
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Part no. 6C112B195BC
Ford Transit MK7 Brake Booster Servo Master Cylinder Unit 6C11-2B195-BC
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Part no. A2114300630
Mercedes W211 CLS C219 Brake Servo Master Cylinder Booster Unit A2114300630
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Part no. 7H2611931HD
Volkswagen VW Transporter Vaccum Pipe Brake Booster No Return Valve 7H2611931HD
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Part no. A0044303130
Mercedes W124 Brake Servo Booster Master Cylinder Unit A0044303130
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Part no. RHD-A1724300730
Mercedes SLK R172 Brake Servo Master Cylinder Booster Module A1724301130
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Part no. 6889231
Brake Servo BMW F40 F44 JCW Master Cylinder Brake Booster Unit 6883890
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Part no. A0054301230
Mercedes-Benz A-Class W168 Brake Servo Master Cylinder A0054301230
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Part no. A2114310162
Mercedes-Benz E-Class S211 W211 Brake Servo Cover A2114310162
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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. A2534301700-1
Mercedes GLC C253 Brake Booster Master Cylinder Module Reservoir A2534301400
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Part no. RHD-1K2614105BL
VW Volkswagen Caddy Brake Servo Booster Master Cylinder Module 1K2614105BL
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Part no. A2054300329
Mercedes W213 OM654 Diesel Vacuum Pipe Line Hose Brake Booster Servo A2054300329
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Part no. A9064300208
Mercedes Sprinter W906 Brake Servo Booster Master Cylinder Unit A9064300208
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Part no. 9T16-2B195-AA
Ford Transit Connect Brake Booster Servo Unit Master Cylinder 9T16-2B195-AA
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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 .