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>This does not sound like a failing bomb simply because the bomb
>itself consists of 1 part. It is a rubber bladder pressurized to
>57bar. I would think that it either works, or it does not.
This is what I thought, so I didn't understand how this could be an
>Does your bomb hold pressure overnight?
Sometimes it does, sometimes it doesn't. Ratio is about 50:50 today.
>When you turn the engine on in the morning is the brake warning light
>on(E-brake not applied)? The bomb should hold the pressure overnight.
Yes, the brake light stays on for 15-30 seconds after releasing the
e-brake. This only happens after the car has sit for a few hours.
But my car (92 S4) has done this for 3 years since I bought it.
Everytime I took it to the dealer for warranty service, I complained
about this and they told me that all S4s do this and there is no fix.
Other S4 owners that I have talked to confirm this.
My theory is that the pressure is somehow leaking through the booster
unit mounted between the master cylinder and the firewall. Does this