How to Replace a Brake Master Cylinder
for all vehicles ( View guide for your vehicle 
)
)
Moderate
2.1 to 2.8 hours to fix for the average DIY'er
Parts needed:
Suggest Parts
Brake Master Cylinder
Brake Fluid
Tools needed:
Suggest Tools
Estimated Costs:
DIY Costs
Est. $1,727.09 parts only Shop Costs
Est. $2,185.06 in parts and labor
Est. $1,727.09 parts only Shop Costs
Est. $2,185.06 in parts and labor
Costs are based on averages for all vehicles.
Guide Steps
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Remove the brake lines from brake master cylinder using flare nut wrenches. edit step -
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Fill both chambers of the brake master cylinder reservoir with brake fluid. edit step -
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Using a bench bleeding kit thread the adaptors into the brake master cylinder. edit step -
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Remove bench bleeding fitting and install brake lines. Some brake fluid may leak out but the brake master cylinder should stop any major leak. edit step -
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Secure your vehicle on a level surface, making sure your car will not roll or lean too much when jacked up. edit step -
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Secure the vehicle with jack stands on both sides for safety before starting any work. The pinch welds and the frame are the two best locations. Do not rely on the jack to hold the vehicle up while working. edit step -
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Remove the wheels by removing the lugs nuts that are holding them on. To do this you will need to find the correct size socket and large ratchet or tire iron and turn them counter clockwise. If your vehicle is equipped with hub caps (plastic covers over the wheels), these will need to be removed to access the lug nuts. edit step -
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Place a 1 x 4 block of wood under the brake pedal to prevent the pedal from traveling to far. edit step -
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Locate the brake bleeder valve on your passenger side rear brake caliper or wheel cylinder. edit step -
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Install a piece of clear plastic tubing over the brake bleeder valve screw and place the other end into a container half full of brake fluid. edit step -
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Crack the bleeder valve open. Old fluid and air bubbles will travel down the clear tubing and into the container. Tighten the bleeder valve. edit step -
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Repeat this process until clean fluid comes out of the bleeder valve and there are no more air bubbles. Check and refill the master cylinder. Do not allow the master cylinder to drain completely. edit step -
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Repeat steps 22 through 25 in the following order: Left rear wheel, right front wheel, left front wheel. edit step -
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Reinstall wheels, lower the vehicle to the ground and verify the repairs with a road test. edit step -
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