Premature Brake Wear in Rear
05-28-2019, 11:42 AM
#1
Premature Brake Wear in Rear
Brought car in for oil change today and received a call saying that it needs rear brake pads & rotors ($607).
Front pads are 8mm and rears are 6mm
Rear tires are down to 4/32 tread.
I only have 15,500 miles on it. How can this be? The rears wore out faster than the fronts!
Pirelli Cinturato P7's on the car.
Will purchase Michelin Pilot Sport A/S 3+ next.
Front pads are 8mm and rears are 6mm
Rear tires are down to 4/32 tread.
I only have 15,500 miles on it. How can this be? The rears wore out faster than the fronts!
Pirelli Cinturato P7's on the car.
Will purchase Michelin Pilot Sport A/S 3+ next.
05-28-2019, 05:20 PM
#6
AudiWorld Member
There are lots of people who have reported issues with the rotors. They can warp prematurely and cause the pads to wear faster. Maybe the rear rotors are warped. That would be my guess.
05-28-2019, 07:27 PM
#7
AudiWorld Member
The A6 has full time all wheel drive torque vectoring. Since the front and rear differentials are open (barring the sport diff), left/right wheel torque vectoring is controlled via the brakes. It is always working, when you turn a corner it can apply brakes to the inside rear, or increase rear bias to prevent nose diving. Hill hold assist may also slightly increase wear.
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05-28-2019, 09:14 PM
#8
AudiWorld Super User
The A6 has full time all wheel drive torque vectoring. Since the front and rear differentials are open (barring the sport diff), left/right wheel torque vectoring is controlled via the brakes. It is always working, when you turn a corner it can apply brakes to the inside rear, or increase rear bias to prevent nose diving. Hill hold assist may also slightly increase wear.
https://www.youtube.com/watch?v=MjaCbpw84kw
https://www.youtube.com/watch?v=MjaCbpw84kw
05-28-2019, 10:27 PM
#9
AudiWorld Member
Unlike the RS5 in that video the A6 does not have brake torque vectoring. Perhaps you’re thinking of EDL (Electronic Differential Lock) Since as you point out it does have open diffs front and rear and uses the brakes and ABS to act as a diff lock when one side starts to slip. Although in all my years I’ve never heard of premature brake wear due to EDL, unless perhaps you drive on ice 100% of the time. Seems to be luck of the draw...some people have rear pads that wear fast others don’t.
Electronic interaxle differential lock*/
selective wheel torque control*
The electronic interaxle differential lock (front
wheel drive) or the selective wheel torque
control (all-wheel drive) operates when driving
through curves. The front wheel on the inside
of the curve or both wheels on the inside
of the curve are braked selectively as needed .
This minimizes sliding in the front wheels and
allows for more precise driving through
curves. The applicable system may not activate
when driving in wet or snowy conditions.
selective wheel torque control*
The electronic interaxle differential lock (front
wheel drive) or the selective wheel torque
control (all-wheel drive) operates when driving
through curves. The front wheel on the inside
of the curve or both wheels on the inside
of the curve are braked selectively as needed .
This minimizes sliding in the front wheels and
allows for more precise driving through
curves. The applicable system may not activate
when driving in wet or snowy conditions.
