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Dorman - First Stop Brake Master Cylinder P/N:M105118
$86.99
Turn brake-pedal effort into the hydraulic pressure that applies the brakes with the Dorman - First Stop Brake Master Cylinder (M105118). Engineered to drop in like the original on the listed applications, it fits the 1981-1984 Chevrolet G10, G20 and P20 and the 1981-1984 GMC G1500, G2500 and P2500 (All engines).
- Cast-iron housing: the cylinder housing is constructed to match the casting material of the original part for similar performance.
- EPDM seals: all rubber components are made of a high-quality EPDM compound for resistance to glycol-based brake fluid.
- 100% new: built entirely from new materials — not remanufactured — and made to meet rigorous SAE International standards.
- Configuration: two outlets with a 1/2-20 rearward outlet size; a reservoir is included, no sensor is included, and mounting hardware is not included.
The master cylinder converts the force from the brake pedal into hydraulic pressure sent to the brake circuits. If a worn or leaking master cylinder is the cause of a sinking pedal or spongy brakes, this unit replaces it; diagnose the cause before replacing. Because mounting hardware is not included, consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: China.
Interchange: 18M173 · 783-36042 · 78336042 · 83-36042 · 8336042 · M900373 · 100-2255 · 1002255 · M-82042 · M82042 · 11865 · 13-1865 · 131865 · 10-1865 · 101865 · 130.62042 · 131.62042 · MC104514 · 355-47051 · 35547051 · 14036113 · 14036114 · M1865 · NM1865 · 2539330 · MC39330 · F104514 · F105118 · MC105118 · Manufacturer part number M105118
This part cross-references / interchanges with the following part numbers:
18M173, 783-36042, 83-36042, M900373, 100-2255, M-82042, 11865, 13-1865, 10-1865, 130.62042, 131.62042, MC104514, 355-47051, 14036113, 14036114, M1865, NM1865, 2539330, MC39330, F104514, F105118, MC105118
Frequently Asked Questions
What does this brake master cylinder do?
It converts the force from your brake pedal into hydraulic pressure that is sent to the brake circuits to apply the vehicle's brakes.
Which vehicles does the M105118 fit?
It's a direct-fit replacement for the 1981-1984 Chevrolet G10, G20 and P20 and the 1981-1984 GMC G1500, G2500 and P2500 (All engines). See the Buyer's Guide tab to confirm your vehicle.
Does it include a reservoir, sensor, or mounting hardware?
A reservoir is included. A sensor is not included, and mounting hardware is not included.
What is it made of?
The cylinder housing is cast iron, constructed to match the original part's casting material, and all rubber components use a high-quality EPDM compound to resist glycol-based brake fluid.
Is it new or remanufactured?
It is 100% new, built entirely from new materials rather than remanufactured, and made to meet rigorous SAE International standards.
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Dorman
Dorman - First Stop Brake Master Cylinder P/N:M105118
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