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BMW E46 Brake Master Cylinders

BMW E46 Brake Master Cylinders 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.
You're currently viewing parts for your (E46) 3-Series 1999-2005. Reset your chassis
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Brake Booster Servo Unit - E46 323i, 325i 328i, 330i This ATE Brand brake booster is a direct replacement for the factory BMW vacuum assited brake booster servo unit on E46 3 series models.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
ATE
Part #: 34336779682
Price: $157.95 (USD) 
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Chase Bays Brake Booster Eliminator - E36, Z3, E46

Gain more constant braking feel and modulation by eliminating your brake booster. With this kit your brakes will function like factory below threshold braking, but above threshold braking, while requiring more effort, this give you better modulation of the brakes giving you total control and the right amount of braking for what you need. 

*Please note this kit will not work with factory lines and requires one of brake line relocation kit below*

 E36/Z3's Up to model year 1994 CB-BMW-E36BBE-92​ 

 E36/Z3's From model year 1995 CB-BMW-E36BBE

 E46 CB-BMW-E46BBE

 

 

Chase Bays
Part #: CB-U-E346BBE
Price: $199.99 (USD) 
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Brake Master Cylinder - E46 M3 2003-2006, Z4m This is an OEM replacement brake master cylinder for the E46 M3 and E85, E86 Z4M.

This item fits the following BMWs:
2003-2006 E46 BMW M3, M3 Convertible
1/2006-2008 E85 BMW Z4 M Roadster M Coupe
Genuine BMW
Part #: 34317838638
Price: $394.46 (USD) 
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Brake Master Cylinder - E46 M3 2001-2002 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
TRW
Part #: 34312282343
Price: $289.95 (USD) 
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