The problem is that the brake pedal gets hard on startup after long hours (overnight or more) of parking.

Just want a poll to see how common it is.

 

yeah it happens sometimes but after it starts it seems to soften up.

 

Participations are appreciated.

Just keep in mind to check brake pedal feel tomorrow Morning startup.

 

for me, engine off=hard brake pedal all the time until start up. as the engine starts and my foot is still on the brake, the pedal eases up and softens to normal feel.

 

I am surprised to see the high percentage (so far) of the problem.

I wonder whether it's a design flaw, quality control issue or manufacturing issue.

Brake booster is a very matured technology.

 

Glad I drive a manual...

 

Have the same problem but never thought anything of it because it softens after start up.

 

I don't think it has anything to do with transmission. Actually it's worse for manual cars (imagine you are on hills when you start and brake pedal is hard)

 

Hi

The way to check the proper function of the brake servo is to place your foot on the footbrake pedal with engine off. When you start the vehilce the servo will operate and the brake pedal will soften slightly.This is absolutely normal and I would be concerned if this did not happen in the situation I describe. It is neither a design fault or problem.

 

This test can only tell if brake servo/booster is totally failed (i.e. leak is faster than vancuum generation).

We are talking about slow vacuum leak here.