2005 Lexus GX 470 Brake Pedal

2005 LEXUS GX 470
Avatar
EDWARDJG1
  • MEMBER
  • 1 POST
Brakes problem
2005 Lexus GX 470 V8 Four Wheel Drive Automatic

When the vehicle is stopped and the foot is on then brake pedal, the pedal keeps going to floorboard. The concern is will the vehicle stay stopped if pedal sinks to floor board????.
Jun 21, 2010 at 6:58 AM
Advertisement
Avatar
MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
Hi there,

If you have no brake fluid leaks, this will be a faulty brake master cylinder, what it is doing is it is by-passing fluid past the primary cup seal and allowing the pedal to drop, normally if you hold heavy brake pressure it will not drop as quickly as light pedal pressure.

Mark (mhpautos)
Jun 21, 2010 at 11:42 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
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.