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Dorman - First Stop Brake Master Cylinder P/N:M630769
$182.99
Turn every push of the brake pedal into the hydraulic pressure that feeds your brake circuits with the Dorman First Stop Brake Master Cylinder (MPN M630769). It drops in as a direct-fit replacement for the 2007-2018 BMW X5 [All] and 2008-2019 BMW X6 [All], and is precision-engineered to match the design, function, and performance of the original master cylinder on those applications.
- 100% new, not remanufactured: built entirely from new, high-quality materials for a safe, durable replacement.
- Precise replacement: the aluminum cylinder housing is constructed 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.
- Strict specifications: made to meet rigorous SAE International standards.
It has a 0.875 in bore and two outlets (rearward outlet M12 x 1.0; secondary outlet thread diameter M12 x 1.0; primary outlet thread pitch 1 mm). The reservoir, sensor, and mounting hardware are not included — consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: Taiwan.
Interchange: 100-3902 · 1003902 · 34336772930 · 13-3395 · 133395 · 11-3395 · 113395 · 130.34027 · 355-31026 · 35531026 · NM55565 · MC391325 · F146014 · MC146014 · R135181. Manufacturer part number M630769.
This part cross-references / interchanges with the following part numbers:
100-3902, 34336772930, 13-3395, 11-3395, 130.34027, 355-31026, NM55565, MC391325, F146014, MC146014, R135181
Frequently Asked Questions
What does this brake master cylinder do?
It converts the force from your brake pedal into hydraulic pressure that is sent through its two outlets to the brake circuits.
Which vehicles does it fit?
It is a direct-fit replacement for the 2007-2018 BMW X5 [All] and 2008-2019 BMW X6 [All]. Check the Buyer's Guide tab to confirm your vehicle.
Does it include a reservoir, sensor, or mounting hardware?
No. The reservoir, sensor, and mounting hardware are not included. Consult the vehicle service information for the correct fasteners and whether they may be reused.
What is it made of?
The cylinder housing is aluminum, constructed to match the original's casting material, and all rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
What are signs the master cylinder may need replacing?
Signs may include a sinking or spongy brake pedal or brake fluid loss. Diagnose the cause before replacing, since these symptoms can have other causes.
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Dorman - First Stop Brake Master Cylinder P/N:M630769
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