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Dorman M630721 Brake Master Cylinder Compatible with Select BMW / Rolls-Royce Models

4.7 (1) Write Review
Free shipping on orders over $29.99

$137.78

$ 59 .99 $59.99

In Stock
  • Precise replacement - cylinder housing is constructed to match the casting material of the original part and ensure similar performance
  • Durable design - all rubber components are made of high-quality EPDM compound for resistance to glycol-based brake fluid
  • 100% new - made entirely of new materials, not remanufactured, to ensure highest quality and safety
  • Strict specifications - made to meet rigorous SAE International standards
  • Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool


This brake master cylinder is precision-engineered to match the design, function, and performance of the original master cylinder on specific vehicle years, makes and models. It is made of new, high-quality materials for a safe, durable replacement.


D. B. Rolling Press
Reviewed in the United States on June 2, 2018
Defective--I spent the usual amount of time installing it and bleeding the brakes. Got good pedal, good braking, no problem there, but this master cylinder won't let the pressure bleed all the way back off. After several times braking, the brakes were sticking hard (with the pedal released). Had to replace it, wasting a lot of time and brake fluid.