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Genuine BMW 325i Brake Master Cylinder

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11 Brake Master Cylinders found

  • BMW 325i Brake Master Cylinder - 34336785664
    Diagram for BMW 325i Brake Master Cylinder - 34336785664
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    BMW 325i Brake Master Cylinder

    Part Number: 34336785664
    $528.31 MSRP: $735.85
    You Save: $207.54 (29%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Other Name: Master Cylinder
    • Replaces: 34-31-6-764-131, 34-33-6-779-720
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 2006 BMW 325i | Sedan(E90)
  • BMW 325i Brake Master Cylinder - 34336785666
    Diagram for BMW 325i Brake Master Cylinder - 34336785666
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    BMW 325i Brake Master Cylinder

    Part Number: 34336785666
    $599.39 MSRP: $877.31
    You Save: $277.92 (32%)
    Ships in 1-3 Business Days
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    Product Specifications
    • Other Name: Master Cylinder
    • Replaces: 34-31-6-776-002, 34-31-6-763-670, 34-33-6-779-680, 34-31-6-752-540, 34-31-6-770-917
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 2001-2005 BMW 325i | Sedan M54 Engine(E46), Sedan M56 Engine(E46), Sedan(E46), Wagon M54 Engine(E46), Wagon M56 Engine(E46), Wagon(E46)
  • BMW 325i Brake Master Cylinder - 34311163711
    Diagram for BMW 325i Brake Master Cylinder - 34311163711
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    BMW 325i Brake Master Cylinder

    Part Number: 34311163711
    $815.76 MSRP: $1194.00
    You Save: $378.24 (32%)
    Ships in 1-3 Business Days
    ADD TO CART
    Product Specifications
    • Other Name: Master Cylinder
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 1992-1995 BMW 325i | Convertible(E36), Sedan(E36)
  • BMW 325i Brake Master Cylinder - 34316752541
    Diagram for BMW 325i Brake Master Cylinder - 34316752541
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    BMW 325i Brake Master Cylinder

    Part Number: 34316752541
    $373.55 MSRP: $542.07
    You Save: $168.52 (32%)
    Ships in 1-3 Business Days
    ADD TO CART
    Product Specifications
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 2001-2005 BMW 325i | Sedan M54 Engine(E46), Sedan(E46), Wagon M54 Engine(E46), Wagon(E46)
  • BMW 325i Brake Master Cylinder - 34316757839
    Diagram for BMW 325i Brake Master Cylinder - 34316757839
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    BMW 325i Brake Master Cylinder

    Part Number: 34316757839
    $523.05 MSRP: $765.56
    You Save: $242.51 (32%)
    Ships in 1-3 Business Days
    ADD TO CART
    Product Specifications
    • Other Name: Master Cylinder
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 2001-2005 BMW 325i | Sedan M54 Engine(E46), Sedan M56 Engine(E46), Sedan(E46), Wagon M54 Engine(E46), Wagon M56 Engine(E46), Wagon(E46)
  • BMW 325i Brake Master Cylinder - 34311165582
    Diagram for BMW 325i Brake Master Cylinder - 34311165582
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    BMW 325i Brake Master Cylinder

    Part Number: 34311165582
    $626.22 MSRP: $916.58
    You Save: $290.36 (32%)
    Ships in 1-3 Business Days
    ADD TO CART
    Product Specifications
    • Other Name: Master Cylinder
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 2001-2005 BMW 325i | Sedan M54 Engine(E46), Sedan(E46), Wagon M54 Engine(E46), Wagon(E46)
  • BMW 325i Brake Master Cylinder - 34311154405
    Diagram for BMW 325i Brake Master Cylinder - 34311154405
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    BMW 325i Brake Master Cylinder

    Part Number: 34311154405
    $678.19 MSRP: $887.36
    You Save: $209.17 (24%)
    Ships in 1-3 Business Days
    ADD TO CART
    Product Specifications
    • Other Name: Master Cylinder
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 1987-1992 BMW 325i | Convertible(E30), Coupe(E30), Sedan(E30)
  • BMW 325i Brake Master Cylinder - 34311154918
    Diagram for BMW 325i Brake Master Cylinder - 34311154918
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    BMW 325i Brake Master Cylinder

    Part Number: 34311154918
    $504.88 MSRP: $692.05
    You Save: $187.17 (28%)
    Ships in 1-3 Business Days
    ADD TO CART
    Product Specifications
    • Other Name: Master Cylinder
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 1987-1992 BMW 325i | Convertible(E30), Coupe(E30), Sedan(E30)
  • BMW 325i Brake Master Cylinder - 34311157206
    Diagram for BMW 325i Brake Master Cylinder - 34311157206
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    BMW 325i Brake Master Cylinder

    Part Number: 34311157206
    $948.63 MSRP: $1388.47
    You Save: $439.84 (32%)
    Ships in 1-3 Business Days
    ADD TO CART
    Product Specifications
    • Other Name: Master Cylinder
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 1987-1992 BMW 325i | Convertible(E30), Coupe(E30), Sedan(E30)
  • BMW 325i Brake Master Cylinder - 34311161866
    Diagram for BMW 325i Brake Master Cylinder - 34311161866
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    BMW 325i Brake Master Cylinder

    Part Number: 34311161866
    Product Specifications
    • Other Name: Master Cylinder
    • Replaces: 34-31-1-157-907
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 1987-1992 BMW 325i | Convertible(E30), Coupe(E30), Sedan(E30)
  • BMW 325i Brake Master Cylinder - 34311161937
    Diagram for BMW 325i Brake Master Cylinder - 34311161937
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    BMW 325i Brake Master Cylinder

    Part Number: 34311161937
    Product Specifications
    • Other Name: Master Cylinder
    • Replaces: 34-31-1-161-661
    • Warranty: This genuine part is guaranteed by BMW's factory warranty.
    Fits the following Vehicles:
    • 1992-1995 BMW 325i | Convertible(E36), Sedan(E36)

BMW 325i Brake Master Cylinder

The BMW 325i Brake Master Cylinder translates pressure from the pedal into precise hydraulic force, allowing drivers to put their foot down with confidence. Seated before the vacuum booster, this cast iron or aluminum unit contains two pistons, springs, and cup seals, which shuttle fluid from a top-mounted reservoir into two separate circuits so that if one line fails, the other still stops the car. Early 325i versions featured an integral reservoir that was held by a wire bail, while later versions of the 325i featured a lighter plastic reservoir that was held by O-rings and threaded caps, which both kept air out of the reservoir. When the pedal is moved, the pistons are forced forward by a pushrod. Fluid pressure is raced through metal lines or flexible hoses, and the rotors are clamped by calipers. Release the pedal and a return spring retracts the pistons. Ports inside the Brake Master Cylinder immediately refill the bore. Moisture corrosion or worn seals cause leaks. A low pedal or damp booster indicates that the Brake Master Cylinder requires immediate attention to keep BMW brakes sharp. Regular fluid service maintains the Brake Master Cylinder and ensures the security of BMW stopping power. A failing Brake Master Cylinder will cause longer stops for any 325i, so every BMW driver should be aware of this important part of the system and treat it with respect.

If you are looking for OEM BMW 325i 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 325i Brake Master Cylinder that come backed by the manufacturer's warranty.

BMW 325i Brake Master Cylinder Parts Questions & Experts Answers

  • BMW 325i Brake Master Cylinder - 34336785664 Brake Master Cylinder Brake Master Cylinder
    34336785664
    Q:
    How to remove and replace the Brake Master Cylinder on BMW 325i?
    Posted by Rana V.
    A:
    Don't allow brake fluid to come into contact with the paint as it will damage the finish. Removal: Working at the rear of the engine compartment, remove the cabin air filter cover mounting bolts and cover. Slide the filter from the housing. Release the catches and remove the left-and right-hand plastic covers from behind the strut tower on each side of the engine compartment. Unzip the wiring where applicable. Depress the clips and pull the cable guide forwards from the cabin air filter lower housing. Release the catch and remove the bolt on each side, then slide the cabin air filter lower housing forwards and maneuver it out. Remove the Brake Master Cylinder reservoir cap, and siphon the brake fluid from the reservoir. Disconnect the fluid hose(s) from the side of the reservoir, and plug the hoses to keep contaminants out of the brake system and to prevent losing any more brake fluid than is necessary. Unclip and pull out the Brake Master Cylinder reservoir locking pin. Carefully ease the fluid reservoir out from the top of the Brake Master Cylinder. Remove the reservoir seals, and plug the cylinder ports to prevent the entry of dirt or moisture. Release the mounting fasteners and remove the driver's side trim panel above the pedals. Disconnect any electrical connectors as the panel is withdrawn. Pry off the clip and remove the pin securing the pushrod to the brake pedal. The Brake Booster must be loosened so the Brake Master Cylinder can be removed and installed. Remove the brake booster retaining nuts; new ones must be installed during installation. Clean the area around the brake line fittings on the lines from the Brake Master Cylinder to the ABS modulator/hydraulic unit, and place rags beneath the line fittings to catch any spilled fluid. Make a note of the correct installed positions of the fittings, then unscrew the mounting nuts and carefully withdraw the lines. The brake lines must not be bent. Plug or tape over the line ends and Brake Master Cylinder openings to keep contaminants out of the brake system and to prevent losing any more brake fluid than is necessary. Wash off any spilled fluid immediately with cold water. Loosen and remove the nuts and washers securing the Brake Master Cylinder to the brake booster, then withdraw the unit from the engine compartment. Remove the O-ring from the rear of the Brake Master Cylinder. Discard the retaining nuts; new ones should be used on installation. If the Brake Master Cylinder is faulty, it must be replaced. Repair kits are not available from dealers, so the cylinder must be treated as a sealed unit.
    Answered by BMW Parts Specialist Noah / May 27, 2025

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