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Dorman M99031 Brake Master Cylinder Review

1

Β·

Average

Revainrating 3 out of 5Β Β 
RatingΒ 
3.0
πŸ›‘ Brake System, 🏎️ Performance Car Parts & Accessories

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img 1 attached to Dorman M99031 Brake Master Cylinder
img 2 attached to Dorman M99031 Brake Master Cylinder
img 3 attached to Dorman M99031 Brake Master Cylinder
img 4 attached to Dorman M99031 Brake Master Cylinder

Description of Dorman M99031 Brake Master Cylinder

New, not remanufactured. Reservoirs, caps and fluid sensors are supplied in the majority of units.

Reviews

Global ratings 1
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Type of review

Revainrating 3 out of 5

Incorrect piston retainer will cause a good master cylinder to fail

I was unable to bleed it after installing it. So I took it off and found that the piston was pushed in and held in place by a snap ring inserted by the servo brake rod. I had a second master cylinder M990312 which I then installed and got the same result. I then checked the original master cylinder and found that it had a piston retaining wire and no snap ring. So I replaced the snap ring with a wire retainer and the master cylinder worked fine. If the master cylinder had the correct piston…

Pros
  • Reservoir, caps and fluid gauge included with most units
Cons
  • Poor repairability