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George H.
George H., ASE Certified Technician
Category: Toyota
Satisfied Customers: 18394
Experience:  ASE Master Tech 15+ years
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I have a 2003 Toyota ghlander which sses loudly each time I

Customer Question

Hi, I have a 2003 Toyota highlander which hisses loudly each time I stepped on the brake and the sound disappears after while still on the brakes. on motion no hissing sound is heard except when I applied the brakes. the brakes still holds well. Please could you assist me to know what could be responsible?
Submitted: 1 year ago.
Category: Toyota
Expert:  George H. replied 1 year ago.

Hello I will help you with your question,

I am not sure what seal you had changed but the hissing noise is the vacuum leaking out of the power brake booster. Even though you have power function at this time it is leaking and needs to be replaced.

Please let me know if you have further questions

Thank you

Customer: replied 1 year ago.
Thanks George, please confirm the power break booster should be replaced. can you also give me an idea of the cost of this brake booster? the seal changed was around the caliper piston.
Expert:  George H. replied 1 year ago.

Yes, if the booster is leaking when you unseat the rear seal by stepping on the brake it should be replaced.

List price for the booster is $750 and it requires 2 hours of labor to replace.

An aftermarket booster is available for about $170 but the quality may not be up to standard. Your shop would have to make that determination.

I don't know the shop labor rate in your area but here it ranges from $80 - $120 per hour.

Please let me know if you have further questions

Thank you

Customer: replied 1 year ago.
thank you George
Expert:  George H. replied 1 year ago.

I am always glad to help, please let me know if you have further questions

Thank you

Customer: replied 1 year ago.
George, pls I also observe engine oil shortage in my car, on a close check observe little drops from underneath the car between the gear box area and the car engine. what could have gone wrong?
Expert:  George H. replied 1 year ago.

Are you able to clean the area and see where the oil is coming from?

Spray brake cleaner works well for this. Clean and dry the area and run the engine for 10 minutes then shut it off and look for the highest wet spot to see what is leaking.

Let me know what you find

Thanks

Customer: replied 1 year ago.
Okay, I will do that and relay back my observation. thanks
Expert:  George H. replied 1 year ago.

Great, let me know what you find

Thanks

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