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Genuine BMW X3 Brake Master Cylinder

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5 Brake Master Cylinders found

  • BMW X3 Brake Master Cylinder - 34336881095
    Diagram for BMW X3 Brake Master Cylinder - 34336881095
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    BMW X3 Brake Master Cylinder Repair Kit

    Part Number: 34336881095
    $369.36 MSRP: $510.05
    You Save: $140.69 (28%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Other Name: Repair Kit Brake Master Cylinder; Master Cylinder, Master Cylinder Assembly
    • Replaces: 34-33-6-873-446
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 2018-2024 BMW X3 | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV), sDrive30i(G01), xDrive30e(G01), xDrive30i(G01)
  • BMW X3 Brake Master Cylinder - 34336857872
    Diagram for BMW X3 Brake Master Cylinder - 34336857872
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    BMW X3 Brake Master Cylinder

    Part Number: 34336857872
    $370.82 MSRP: $512.06
    You Save: $141.24 (28%)
    Ships in 1-3 Business Days
    ADD TO CART
    Product Specifications
    • Other Name: Brake master cylinder; Brake Booster, Master Cylinder
    • Replaces: 34-33-6-797-471
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 2011-2017 BMW X3 | sDrive28i(F25), xDrive28d(F25), xDrive28i(F25), xDrive35i(F25)
  • BMW X3 Brake Master Cylinder - 34336786629
    Diagram for BMW X3 Brake Master Cylinder - 34336786629
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    BMW X3 Brake Master Cylinder

    Part Number: 34336786629
    $477.57 MSRP: $665.18
    You Save: $187.61 (29%)
    Ships in 1-3 Business Days
    ADD TO CART
    Product Specifications
    • Other Name: Brake master cylinder; Master Cylinder
    • Replaces: 34-31-6-761-077, 34-33-6-779-743
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 2004-2010 BMW X3 | 2.5i(E83), 3.0i(E83), 3.0si(E83)
  • BMW X3 Brake Master Cylinder - 34336871455
    Diagram for BMW X3 Brake Master Cylinder - 34336871455
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    BMW X3 Brake Master Cylinder

    Part Number: 34336871455
    $366.02 MSRP: $505.44
    You Save: $139.42 (28%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Other Name: Brake master cylinder; Brake Booster, Master Cylinder
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 2011-2017 BMW X3 | sDrive28i(F25), xDrive28d(F25), xDrive28i(F25), xDrive35i(F25)
  • BMW X3 Brake Master Cylinder - 34336881616
    Diagram for BMW X3 Brake Master Cylinder - 34336881616
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    BMW X3 Brake Master Cylinder Repair Kit

    Part Number: 34336881616
    $419.35 MSRP: $579.08
    You Save: $159.73 (28%)
    Ships in 1-3 Business Days
    ADD TO CART
    Product Specifications
    • Other Name: Repair Kit Brake Master Cylinder; Master Cylinder, Master Cylinder Assembly
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 2018-2024 BMW X3 | 6 Cyl 3.0 L GAS, 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV), M40i(G01)

BMW X3 Brake Master Cylinder

The BMW X3 Brake Master Cylinder takes the force applied to the brake pedal and changes it into precisely controlled hydraulic pressure that brings the SUV to a safe stop. Located inside its aluminum or cast iron housing, the Brake Master Cylinder contains dual pistons and their resilient seals and return springs, which feed into separate circuits so that, in the event of a single hydraulic system failure, partial braking can still be maintained. Many models of the BMW X3 have the Brake Master Cylinder mounted on the vacuum booster in front of the firewall, connected to an external plastic fluid reservoir sealed by O-rings, although earlier cast iron units sometimes applied an integral reservoir with a single bail secured cap. When the driver presses the pedal in a BMW X3, a pushrod pushes the Brake Master Cylinder pistons along, which compresses a fluid that flows over metal lines and flexible hoses to calipers or drums and then slows down the wheels. Lifting the pedal causes the Brake Master Cylinder springs to withdraw and draw fluid back through refill ports, keeping the system full. Seal wear or internal corrosion is the reason why the BMW X3 requires regular fluid changes to help avoid a low pedal.

If you are looking for OEM BMW X3 Brake Master Cylinder, 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 X3 Brake Master Cylinder that come backed by the manufacturer's warranty.

BMW X3 Brake Master Cylinder Parts Questions & Experts Answers

  • BMW X3 Brake Master Cylinder - 34336786629 Brake Master Cylinder � Brake Master Cylinder
    34336786629
    Q:
    What are the steps involved in removing and reinstalling the brake master cylinder and brake fluid reservoir on BMW X3?
    Posted by Ann N.
    A:
    Brake fluid is highly corrosive and dangerous to the environment, so it must be disposed of properly. Begin by removing the heater bulkhead and partition wall near the reservoir. When working at the brake fluid reservoir located at the left rear of the engine compartment, detach the brake fluid level sensor connector and remove the reservoir cap. Use a clean syringe to empty the brake fluid reservoir. For manual transmission vehicles, disconnect the clutch brake master cylinder supply line from the fluid reservoir, being prepared to catch any dripping fluid, and secure the supply line in a vertical position to prevent excessive fluid loss. Plug open brake fluid lines and ducts to prevent leakage and contamination. Remove the brake fluid reservoir by pulling it vertically out of the brake master cylinder, then disconnect the brake master cylinder brake lines and plug them to prevent contamination. Remove the brake master cylinder mounting nuts and take out the cylinder. During reinstallation, ensure that all nuts, fluid couplings, thread bores, and mating surfaces are clean. Mount the brake master cylinder to the brake booster using a new sealing O-ring and new self-locking nuts, then connect the brake fluid lines to the brake master cylinder and reinstall the fluid reservoir with new sealing grommets. It is important to align the brake master cylinder pushrod and booster pushrod, and avoid over-torquing the brake master cylinder mounting nuts to prevent damage to the brake booster and ensure proper vacuum build-up. Reconnect the clutch fluid supply hose if applicable, and complete the installation in reverse order of removal. Finally, top up with fresh brake fluid and bleed the entire brake system.
    Answered by BMW Parts Specialist Blaine / Dec 14, 2025

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