Convert brake-pedal force into hydraulic pressure for the brakes with the Dorman First Stop brake master cylinder, part number M630292, a direct-fit replacement for the 2002-2006 Acura RSX and 2002-2004 Honda CR-V (all engines). Dorman precision-engineers it to match the original master cylinder's design, function and performance on the listed applications. It is built from new, high-quality materials for a safe, durable replacement.
- Precise replacement: the aluminum cylinder housing is constructed to match the original part's casting material for similar performance.
- Durable design: every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: made entirely from new materials for quality and safety.
- Strict specifications: built to meet rigorous SAE International standards.
Specifications: 0.938 in. bore diameter; two outlets; M10 x 1.0 rearward and secondary outlet threads; 1 mm primary outlet thread pitch; reservoir included; sensor included; mounting hardware not included. Country of origin: Taiwan.
Signs a master cylinder may need replacing include a soft or sinking brake pedal and brake fluid leaking at the master cylinder. Other brake components can cause similar symptoms, so diagnose the system first. If the master cylinder is the cause, this unit replaces it.
Interchange: 100-3028 · 072-9536 · 13-3175 · 13-4200 · 11-3175 · 130.40052 · 355-59034
1003028 · 0729536 · 133175 · 134200 · 113175 · 13040052 · 35559034 · 13872 · 46100S6MA52 · 46100SCAA51 · M55145 · NM55145 · MC390721 · F141573 · MC141573
Frequently Asked Questions
Does this master cylinder fit both the 2002-2006 Acura RSX and the 2002-2004 Honda CR-V?
Does this master cylinder come with a reservoir?
Yes. The reservoir and a sensor are both included with the master cylinder. Mounting hardware is not included, so consult the vehicle service information for the correct fasteners.
What are the bore size and outlet threads?
It has a 0.938 in. bore and two outlets. The rearward and secondary outlets use M10 x 1.0 threads, and the primary outlet has a 1 mm thread pitch.
What are signs a brake master cylinder may need replacing?
Common signs include a soft or sinking brake pedal and brake fluid leaking at the master cylinder. Other brake parts can cause similar symptoms, so diagnose the system before replacing it.
What should I know about installation?
A master cylinder is typically bench-bled before installation, and the brake system is bled afterward. Follow the vehicle service procedure and use the brake fluid type specified for your vehicle.
This part cross-references / interchanges with the following part numbers:
100-3028, 072-9536, 13872, 13-3175, 13-4200, 11-3175, 130.40052, 355-59034, 46100S6MA52, 46100SCAA51, M55145, NM55145, MC390721, F141573, MC141573
