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Dorman - First Stop Brake Master Cylinder P/N:M630111
$105.99
Send firm hydraulic pressure to your brakes with the Dorman - First Stop Brake Master Cylinder M630111 — the component that converts brake-pedal force into the hydraulic pressure that operates the vehicle's brakes. Engineered to match the original master cylinder's design, function, and performance, it drops in as a direct-fit replacement for the 2002-2004 Acura RSX [All] and 2001-2005 Honda Civic [All].
- 100% new: made entirely of new materials, not remanufactured.
- Aluminum housing: built to match the casting material of the original part for similar performance.
- Durable seals: all rubber components use a high-quality EPDM compound that resists glycol-based brake fluid.
- Strict specifications: made to meet rigorous SAE International standards.
This unit includes the fluid reservoir and sensor, and features two outlets, a 0.875 in bore, and M10 x 1.0 outlet threads. Mounting hardware is not included — consult the vehicle service information for the correct fasteners and whether they may be reused. If a failed master cylinder is the cause of a sinking or spongy pedal, this replaces it; diagnose the cause before replacing. Country of origin: China.
Interchange: 83-08049 · 8308049 · M901200 · M901256 · 100-1351 · 1001351 · M-54049 · M54049 · 072-9438 · 0729438 · 072-9752 · 0729752 · 13933 · 13-2943 · 132943 · 11-2943 · 112943 · 130.40049 · 131.40049 · MC511540 · 355-59031 · 35559031 · 46100S5DA51 · 46100S6MA01 · 46100S6MC01 · M55129 · NM55129 · MC390722 · MC390808 · F140217 · F141069 · MC140217. Manufacturer part number M630111.
This part cross-references / interchanges with the following part numbers:
83-08049, M901200, M901256, 100-1351, M-54049, 072-9438, 072-9752, 13933, 13-2943, 11-2943, 130.40049, 131.40049, MC511540, 355-59031, 46100S5DA51, 46100S6MA01, 46100S6MC01, M55129, NM55129, MC390722, MC390808, F140217, F141069, MC140217
Frequently Asked Questions
What does the M630111 master cylinder do?
It converts the force from your brake pedal into the hydraulic pressure that operates the vehicle's brakes. If a failed master cylinder is the cause of a sinking or spongy pedal, this replaces it.
Which vehicles does it fit?
It's a direct-fit replacement for the 2002-2004 Acura RSX [All] and 2001-2005 Honda Civic [All]. Check the Buyer's Guide tab to confirm your vehicle.
Does it include a reservoir and sensor?
Yes. This unit includes the fluid reservoir and the sensor. It also has two outlets with M10 x 1.0 threads and a 0.875 in bore.
Is mounting hardware included?
No, mounting hardware is not included. Consult the vehicle service information for the correct fasteners and whether they may be reused.
What is it made of?
The housing is aluminum, built to match the casting material of the original part, and all rubber components use a high-quality EPDM compound that resists glycol-based brake fluid.
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Dorman
Dorman - First Stop Brake Master Cylinder P/N:M630111
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