SureTrack Community Fix: Locking up Kia

Real Fixes from Mitchell 1’s SureTrack® expert information resource are documented issues from actual shop repair orders and community discussions. Read on to see how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is available at no additional cost in our ProDemand product.

How many parts can you replace trying to resolve a problem? How about all of them and it still doesn’t work. SureTrack community member bender24 had a 2001 Kia in the shop that had the right front brake locking up and replacing all the brake parts didn’t resolve it. They posed the question to the community, and with the help of fellow community member mistadave and others, they were able to resolve the issue quickly.

The following Community Fix summarizes the interaction between members of the community that led to the solution.

2001 Kia Sephia Base 1.8L

Right front brake locking up, replaced booster push rod.

Right front brake will lock up once it gets hot. When given a chance to cool, it frees up. You are able to drive about a mile before it starts to lock up again.

Diagnostic Steps Performed/Parts Replaced
Replaced the brake booster, brake master cylinder, brake proportioning valve, rear brake cylinders and shoes, front brake hoses, front brake lines, front brake rotors, front brake pads, front brake calipers and front wheel bearings. Also flushed out the brake fluids. What else could cause the one wheel to lock up once it gets hot?

Best Answer from Community Member mistadave
This unit may have diagonal brake system. Make sure there is a little slack in the pedal. Someone may have replaced the brake lamp switch and got it out of adjustment.

The rod that goes between the master cylinder and booster was incorrect and was slightly too long.

Replaced rod between master cylinder and booster and brakes no longer lock up.

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About the Author

Nick Taylor

Nick Taylor is the SureTrack Community Administrator and a Senior Applications Specialist at Mitchell 1 with over 25 years of experience with electronic repair data systems. Nick previously worked in the automotive dismantling and engine rebuilding industries.