TRW BMW Brake Master Cylinders for BMW 3 Series E46 (1999-2005)

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The brake master cylinder is responsible for distributing fluid from the reservoir to the front and rear brake systems. The fluid reservoir actually sits on top of the master cylinder with hard metal brake lines running out of it. There are a few places where the master cylinder can leak and cause a spongy or soft brake pedal. The inside has several pistons with o-rings and seals that can fail and allow brake fluid to escape. Likewise, the external metal lines also have o-rings where fluid can seep out or let air/moisture in.

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Brake Master Cylinder - E46 M3 2001-2002
Brake Master Cylinder - E46 M3 2001-2002
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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T#:15925
Part#: 34312282343
In Stock at Vendor
$ 168.99

This product was last offered at the strikethrough price on
04-30-2026

$ 159.99 USD
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$ 159.99 USD
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This is an OEM replacement brake master cylinder for the E46 M3.

This item fits the following BMWs:
2001-2002 E46 BMW M3, M3 cpnvertible
Brake Booster - E46 3-Series
Brake Booster - E46 3-Series
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
TRW - Corporate Logo
T#:25142292
Part#: 34336779682
Back Ordered
$ 292.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 292.99 USD
Free Shipping on orders $49 and up
Add to Wish List
The brake booster in a car is essential for improving the efficiency of the braking system by amplifying the force exerted on the brake pedal. As time passes, the brake booster may undergo wear and tear, resulting in problems like reduced braking power, a soft or spongy brake pedal sensation, and potential brake fluid leaks. These issues pose a threat to the overall safety and performance of the vehicle. Consequently, replacing a worn or malfunctioning brake booster is crucial to maintaining optimal braking performance and ensuring the safety of the vehicle.
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