How to Replace a Master Cylinder on a Honda Accord

If you have noticed your brake pedal slowly dropping whenever you apply sustained braking pressure, or brake fluid leaking from the back of your engine bay, the culprit could be a faulty master cylinder. Master cylinders have a tendency to wear out or become damaged by contaminates in the brake fluid. When this happens on your Honda Accord, it is important to replace the master cylinder quickly. This is a job most home mechanics can accomplish in an afternoon and requires only a few common tools.

Instructions

1

Remove the two electrical connectors that are attached to the master cylinder on your Honda Accord. Push in the tabs on the sides of the connector, then pull the connector away from the master cylinder.

2

Use a 10 mm line wrench to open the two brake lines connected to the side of your master cylinder. Some brake fluid will spill out of them.

3

Remove the two 12 mm bolts that attach the master cylinder to the brake booster. It will be much easier to remove these bolts if you use an extension along with the 12 mm socket and wrench.

4

Pull out the old master cylinder and put the new one in its place. Mount the new one in place using the 12 mm bolts you removed. Tighten these with the socket wrench.

5

Attach the brake lines you disconnected in Step 2 to the new master cylinder. Begin threading these by hand, then use the line wrench to tighten them.

6

Attach the electrical connectors to the new master cylinder by pushing them into the appropriate ports. Each connector only fits into one of the ports; just attach each one to the port that fits.