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Dorman - First Stop Brake Master Cylinder P/N:M630204
$150.99
Turn brake-pedal effort into the hydraulic pressure that pushes fluid to every wheel with the Dorman - First Stop Brake Master Cylinder M630204. It installs as a direct-fit replacement across a range of Audi and Volkswagen applications, engineered to match the design, function, and performance of the original master cylinder on the listed vehicles.
- 100% new: made entirely of new materials — not remanufactured — for consistent quality and safety.
- Aluminum housing: built to match the casting material of the original part for similar performance.
- Durable seals: rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- Built to spec: made to meet rigorous SAE International standards, with a 1 in bore and two outlets (M12 x 1.0 thread, 1 mm pitch).
Note: this listing is for the master cylinder only — the reservoir, sensor, and mounting hardware are not included. If a worn or leaking master cylinder is the cause of a low or sinking brake pedal, this replaces it; diagnose the cause before ordering. Country of origin: China.
Fitment (engine: All): 2002-2009 Audi A4; 2003-2009 Audi A4 Quattro; 2002-2004, 2006, and 2010-2011 Audi A6; 2002-2006 and 2010-2011 Audi A6 Quattro; 2003-2005 Audi Allroad Quattro; 2002 and 2004-2008 Audi S4; 2002-2003 and 2011 Audi S6; and 2002-2005 Volkswagen Passat.
Interchange: M901216 · 100-1064 · 1001064 · 13611 · 13-3051 · 133051 · 11-3051 · 113051 · 130.33116 · 355-74000 · 35574000 · M55281 · NM55281 · MC390778 · 8E0611021 · F141623 · F141792 · F142397 · MC141623 · MC141792
This part cross-references / interchanges with the following part numbers:
M901216, 100-1064, 13611, 13-3051, 11-3051, 130.33116, 355-74000, M55281, NM55281, MC390778, 8E0611021, F141623, F141792, F142397, MC141623, MC141792, MC142397
Frequently Asked Questions
What does the M630204 master cylinder do?
It converts the force from your brake pedal into hydraulic pressure, sending brake fluid through its two outlets to the vehicle's brake circuits.
Does it include a reservoir, sensor, or mounting hardware?
No. This listing is for the master cylinder only; the reservoir, sensor, and mounting hardware are not included. Consult the vehicle service information for the correct fasteners.
Is this unit new or remanufactured?
It's 100% new, made entirely of new materials rather than remanufactured, and its rubber components use an EPDM compound resistant to glycol-based brake fluid.
What are the bore and outlet specifications?
It has a 1 in bore and two outlets with M12 x 1.0 threads (1 mm pitch).
Which vehicles does it fit?
It's a direct-fit replacement for a range of 2002-2011 Audi models (A4, A6, S4, S6 and more) plus the 2002-2005 Volkswagen Passat; see the Buyer's Guide tab for the full year-by-model list.
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Dorman
Dorman - First Stop Brake Master Cylinder P/N:M630204
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