ABS Light

[Grant Lenahan]

There are brake pad sensors on C5 A6s - but the light comes on and 
stays on as I recall.

Audis do need regular T-Belt service. Most often, the water pump wears, 
drags, and breaks it (eating valvers). I have heard of tensioners 
going, but cant say what the mechanism is. Generally the recommendation 
on v6 cars is 75k miles, rather than Audi's "play with fire" 105k.

Grant
On May 6, 2007, at 11:09 AM, Bill Shaw wrote:

> Got the 'new A6QA running yesterday and took it out for a test spin.
> The engine feels good but I've uncovered a couple more problems that
> need to be addressed..  It has a bad outer tie rod end on the driver's
> side,  a small leak in the exhaust,  a flashing 'brake' light and a
> solidly lit ABS light in the instrument cluster, and the brake pedal is
> s little soft.  I flushed the brake fluid with no change.  Is the
> flashing 'brake' light due to a pad wear sensor (like my p-cars)?  Any
> advise on how to diagnose the ABS light problem?
>
> Also,  when I had the cam covers off  checking the cam timing,  I
> noticed that the chain tensioners look somewhat like the ones used in 
> 16
> valve 944s and 32 valve 928s.  The 944s and 928s have an issue with the
> pads on the tensioners wearing,  then breaking and causing the chain to
> snag on the tensioner,  breaking the chain, ripping off the tensioner,
> stripping the teeth off the cams, and bending some valves.  Has this
> been an issue on the Audi motors?  There was some slight wear in the
> pads on my engine,  but nowhere as bad as the ones we just replaced on 
> a
> 16v 944.
>
> Bill
> '99 A6QA
> '87 944s
> '84 928s Vortech/749
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