Turn pedal effort into hydraulic brake pressure with the Dorman brake master cylinder from Dorman - First Stop, part number M66705. It is a direct-fit replacement for many vehicles, among them the 1969-1970 Buick LeSabre, 1969-1970 Pontiac Executive and 1967-1970 Buick Electra; see the Buyer's Guide tab for the full list.
Dorman precision-engineered this unit to replicate the original master cylinder's design, function and performance on the listed vehicles. It is intended as a safe, durable replacement.
- Precise replacement: The cast iron housing is built 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, high-quality materials.
- Strict specifications: Built to meet rigorous SAE International standards.
This Dorman master cylinder includes the reservoir. It has a 1 in bore diameter, two outlets and a 1/2-20 secondary outlet thread. Mounting hardware and a sensor are not included, so consult the vehicle service information for the correct fasteners and whether the originals may be reused. Signs this part may need replacing include a soft or sinking pedal, fluid leaking at the master cylinder, or a steadily dropping fluid level. Diagnose the cause before replacing it, because other brake components can produce similar symptoms. Country of origin: China.
Interchange: 83-36018 · 83-50018 · 100-2228 · M-82018 · 13-1363 · 10-1363 · 130.62018 · 355-52005
8336018 · 8350018 · 1002228 · M82018 · 131363 · 101363 · 13062018 · 35552005 · M900093 · 11363 · MC512040 · 5458521 · 5463417 · 5464139 · M1489 · NM1489 · MC36234 · F66705 · MC66705
This part cross-references / interchanges with the following part numbers:
83-36018, 83-50018, M900093, 100-2228, M-82018, 11363, 13-1363, 10-1363, 130.62018, MC512040, 355-52005, 5458521, 5463417, 5464139, M1489, NM1489, MC36234, F66705, MC66705
