Convert brake-pedal force into the hydraulic pressure that feeds both brake circuits with the Dorman - First Stop Brake Master Cylinder M630753. It drops in as a direct-fit replacement for the 2000-2003 Chevrolet Malibu, 2000-2004 Oldsmobile Alero, 2000-2005 Pontiac Grand Am, and 2004-2005 Chevrolet Classic (all engines). Dorman precision-engineers this unit to reproduce the original master cylinder's design, function, and performance on the covered applications.
- Precise replacement: aluminum housing built to match the casting material of the original part for similar performance.
- Durable design: all rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- 100% new: made entirely from new materials, not remanufactured.
- Built to spec: made to meet rigorous SAE International standards.
The dual-outlet design uses a 24 mm bore, with both the primary and secondary outlets threaded M10 x 1.0 (1 mm pitch). A fluid reservoir and a sensor are included; mounting hardware is not, so 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 brake pedal, this unit replaces it. Country of origin: China.
Interchange: 174-790 · 174790 · 18M983 · 100-2332 · 1002332 · 13555 · 13-2959 · 132959 · 10-2959 · 102959 · 130.62118 · 131.62118 · 355-47088 · 35547088 · 18045119 · 18060787 · M3092 · NM3092 · MC390676 · F131955 · MC131955 · R134755
Manufacturer part number M630753.
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What's included with this master cylinder?
The listing includes the master cylinder with a fluid reservoir and a sensor. Mounting hardware is not included.
Which vehicles does the M630753 fit?
It is a direct-fit for the 2000-2003 Chevrolet Malibu, 2000-2004 Oldsmobile Alero, 2000-2005 Pontiac Grand Am, and 2004-2005 Chevrolet Classic (all engines). See the Buyer's Guide tab to confirm your vehicle.
What is the bore and outlet size?
It has a 24 mm bore and two outlets. Both the primary and secondary outlets are threaded M10 x 1.0 (1 mm pitch).
Is this master cylinder remanufactured?
No. It is 100% new, made entirely from new materials, with an aluminum housing and EPDM rubber components that resist glycol-based brake fluid.
What are signs the master cylinder may need replacing?
A spongy pedal, a pedal that slowly sinks under steady pressure, or a low pedal. Have the cause diagnosed first, since other brake components can produce these symptoms.