How to remove and install the brake booster and master cylinder on BMW M3?

To remove and install the brake booster and master cylinder, first disconnect the negative battery cable and siphon the brake fluid from the reservoir. Remove the reservoir and, if applicable, disconnect the clutch hydraulic hose. Disconnect all brake lines from the master cylinder and remove the instrument panel trim from the bottom left inside the passenger compartment. Take off the return spring from the brake pedal, press off the clip, and remove the pin connecting the booster rod to the brake pedal. Remove the four nuts and pull the booster and master cylinder out of the engine compartment. For installation, if the filter in the brake booster is clogged, clean it by removing the dust boot, retainer, damper, and filter, ensuring that the slots in the damper and filter are offset by 180 degrees upon reinstallation. Install the brake booster and torque the nuts to 16-17 ft. lbs. (22-24 Nm), then connect the brake lines and torque them to 10 ft. lbs. (14.2 Nm). Reconnect the reservoir and lines, attach the brake pedal to the pushrod, adjust the pedal height and brake light switch, and finally fill and bleed the system.

Genuine BMW M3 Brake Booster

Brake Power Booster

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8 Brake Boosters found

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BMW M3 Power Brake Booster
Part Number: 34337850999
$483.69 MSRP: $673.69
You Save: $190.00 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Brake Servo Unit; Booster, Brake Booster
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2015-2018 BMW M3 | Sedan(F80)
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BMW M3 Power Brake Booster
Part Number: 34332282622
$550.70 MSRP: $699.35
You Save: $148.65 (22%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Brake Servo Unit; Booster Assembly, Brake Booster
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2001-2006 BMW M3 | Convertible(E46), Coupe(E46)
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BMW M3 Power Brake
Part Number: 34517885729
$1074.84 MSRP: $1497.08
You Save: $422.24 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Booster, Brake Booster, Master Cylinder
- Replaces: 34-51-7-882-966
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2021-2022 BMW M3 | 6 Cyl 3.0 L GAS
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BMW M3 Power Brake Booster
Part Number: 34337849876
$483.69 MSRP: $673.69
You Save: $190.00 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Brake Servo Unit; Booster, Brake Booster
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2015-2018 BMW M3 | Sedan(F80)
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BMW M3 Power Brake Booster
Part Number: 34332283392
$463.46 MSRP: $640.00
You Save: $176.54 (28%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Brake Servo Unit; Booster Assembly, Brake Booster
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2008-2013 BMW M3 | Convertible(E93), Coupe(E92), Sedan(E90)
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BMW M3 Power Brake Booster
Part Number: 34332282193
$550.70 MSRP: $699.35
You Save: $148.65 (22%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Brake Servo Unit; Brake Booster
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2001-2006 BMW M3 | Convertible(E46), Coupe(E46)
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BMW M3 Power Brake Booster
Part Number: 34332225506
$1414.55 MSRP: $1879.31
You Save: $464.76 (25%)
Product Specifications
- Other Name: Brake Servo Unit; Brake Booster
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1988-1991 BMW M3 | Coupe(E30)
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BMW M3 Power Brake Booster
Part Number: 34331162965
Product Specifications
- Other Name: Brake Servo Unit; Brake Booster
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1995-1999 BMW M3 | Convertible(E36), Coupe(E36), Sedan(E36)

BMW M3 Brake Booster

The BMW M3 Brake Booster increases the force of the pedal, helping to achieve great stopping power with light foot pressure. Over the generations of M3, BMW has chiefly applied a vacuum-operated Brake Booster that is placed between the pedal assembly and master cylinder. Further, the Brake Booster uses engine vacuum on one side of the diaphragm while the other sees atmospheric air flooding in when the driver brakes. Thus, the piston is pushed, energizing the hydraulic circuit. This design from BMW guarantees lightweight construction, compact architecture, and functionality in nearly all contexts. In years past, a hydraulic Brake Booster drew pressure from the steering pump and stored it in an accumulator for low vacuum assistance. Both systems increase the amount of pedal input, although the vacuum unit is simpler and requires the engine running. The hydraulic version provides consistent help without needing manifold vacuum, although it is more complicated. BMW recorded a large recall involving roughly 76,000 cars, including certain M3 models, to address potential sealing issues that could reduce Brake Booster effectiveness and lengthen stopping distances. Because of its construction, the Brake Booster is mostly trouble-free. The driver must understand these two assist systems to appreciate how each combined pressure on the brake pedal translates to slight effort for M3 deceleration.

If you are looking for OEM BMW M3 Brake Booster, we highly recommend to shop with us. Not only do we offer budget friendly prices, but we also provide fast delivery. In addition, we have a hassle-free return policy on all genuine BMW M3 Brake Booster that come backed by the manufacturer's warranty.

BMW M3 Brake Booster Parts Questions & Experts Answers

Power Brake Booster
34332225506
Q:
How to remove and install the brake booster and master cylinder on BMW M3?
Posted by Abhinav R.
A:
To remove and install the brake booster and master cylinder, first disconnect the negative battery cable and siphon the brake fluid from the reservoir. Remove the reservoir and, if applicable, disconnect the clutch hydraulic hose. Disconnect all brake lines from the master cylinder and remove the instrument panel trim from the bottom left inside the passenger compartment. Take off the return spring from the brake pedal, press off the clip, and remove the pin connecting the booster rod to the brake pedal. Remove the four nuts and pull the booster and master cylinder out of the engine compartment. For installation, if the filter in the brake booster is clogged, clean it by removing the dust boot, retainer, damper, and filter, ensuring that the slots in the damper and filter are offset by 180 degrees upon reinstallation. Install the brake booster and torque the nuts to 16-17 ft. lbs. (22-24 Nm), then connect the brake lines and torque them to 10 ft. lbs. (14.2 Nm). Reconnect the reservoir and lines, attach the brake pedal to the pushrod, adjust the pedal height and Brake Light Switch, and finally fill and bleed the system.
Answered by BMW Parts Specialist Blaine / Dec 29, 2025