chrisvr6

does anyone feel a slight buzzing in the brake pedal? I assume it is the brake power assist. i dont remember it in other gx's when i test drove them. its only for a couple seconds maybe less.

gsobol

Can't be brake assist. YOU WOULD KNOW IT WHEN THAT KICKS IN !!!

chrisvr6

Not hill decent control. The brakes have electronic assist for normal braking an I feel it when it does assist. Is that normal?

gsobol

Brake assist kicks in during emergency braking. From the Lexus site: "If the system detects an emergency braking situation and the driver does not apply enough pressure to the pedal to activate ABS, the system provides supplemental braking power."

When you kick the brake pedal, the brake assist will continue to apply the pressure and the brake pedal will continue to travel toward the floor until the ABS kicks in. If you never experience it, you wouldn't know what I'm referring to. It's one of those weird things that freaks you out when you feel the brake pedal sink below your foot even though you stop pressing it!

What you may feel is the vibration from the brake fluid booster pump, but you would only feel it once the pressure drops, like a repeated brake use in the short time. I tried to pump up my brakes and I can feel a bit of a vibration on the pedal when the pump kicks in, but can't feel it during normal use. Is the vibration present all the time, or only occasionally, and how often?