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Ask Chad Farhat Your Own Question
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Kia
Satisfied Customers: 3647
Experience:  Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles
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Rear brakes do not work, 60000 miles not original brakes

Customer Question

rear brakes do not work
JA: How many miles are on the car? Are these the orignial brakes?
Customer: 60000 miles not original brakes plenty of pad left on brakes no pressussure to caliper piston
JA: What is the model/year of your Kia?
Customer: 2006 optima
JA: Are you fixing your Optima yourself? What have you tried so far?
Customer: yes changed front pads yesterday for overheating brake problem still overheating.your mechanic suggested checking rear brakes not working causing fronts to work harder and heat up. thats when i found rear calipers are not working
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 7 months ago.
Category: Kia
Expert:  Chad Farhat replied 7 months ago.

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

Expert:  Chad Farhat replied 7 months ago.

Hey how are you

Please read below TSB bulletin on this kia ,this will cause the caliper not moving the pads ,click on link to view diagrams

but if the calipers are sized up replace them after checking that there is fluid coming to them ,unless you have a problem with brake master or abs unit ?

any warning light on dash now ?

2006 Kia Optima L4-2.4L VIN 6

Save Article

Model All Model Group Brake System(41) Number KT2008090502 Date Friday, September 05, 2008 Area N.America Subject Brake Noise - All Models - Description Some vehicles may experience a squeaking or grinding noise originating from the front or rear disc brakes when applying the brake. The concern maybe related to the brake pads sticking and not moving freely in the slides due to lack of lubrication one/or corrosion. To address this concern remove, clean and lubricate the brake pad contact area as shown in the article.

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^ Remove caliper mounting bracket as required

^ Clamp mounting bracket into vice and clean the rust and/or corrosion using a wire brush

^ Lubricate the cleaned areas with CRC(R) Synthetic Brake Caliper Grease

^ Use grease on both sides of anti-squeak shim if equipped

Make sure NO grease gets on the braking surfaces.

If grease gets on the pad friction material or rotor it must be cleaned before road-testing the vehicle.

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Please let me know

Thank You

Chad Farhat

ASE Certified Technician

Expert:  Chad Farhat replied 7 months ago.

Happy Holidays

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Thank You
Chad Farhat
ASE Certified Technician