When I start my car and press the brake it sound air and go down little bit, even on a motion when you press it down it sound air before catching.
Jul 18, 2019 at 6:16 AM
When I press the brake it sound air and go down little
2007 LEXUS GX 470
MAFI DARE MICHAEL
- MEMBER
- 1 POST
Advertisement
KASEKENNY
- ✓ASE Certified Mechanic
- 18,907 POSTS
Hi Michael,
More than likely this is the brake booster. Do the brakes operate normally? If you have the engine off and you press the brakes, you will probably get 1-3 presses of the pedal before the vacuum is gone and the pedal gets hard. If this is the same noise you are hearing and the brakes are working then I suspect this is a normal condition.
More than likely this is the brake booster. Do the brakes operate normally? If you have the engine off and you press the brakes, you will probably get 1-3 presses of the pedal before the vacuum is gone and the pedal gets hard. If this is the same noise you are hearing and the brakes are working then I suspect this is a normal condition.
Jul 19, 2019 at 1:05 PM
JIS001
- ✓ASE Certified Mechanic
- 3,412 POSTS
Hello and welcome to 2carpros. Can you upload a video of the sound when you press on the brakes? I am asking because the GX does not have a brake booster? It has an acuator which is hydraulic and electric controlled? Attaching image.
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Aug 3, 2019 at 10:47 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.