After a couple of hard stops, my brake pedal is very soft. It takes a lot to stop the car.
03-08-2009, 06:03 PM
#1
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After a couple of hard stops, my brake pedal is very soft. It takes a lot to stop the car.
Are my pads glazed due to overheating or is my brake booster taking a dump?
03-09-2009, 03:25 AM
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The A8 is heavy and the stock brakes (disc+pad) are actually undersized. They fade after...
They fade after repeated heavy stops. They work okay during a single hard stop but doing that several times in sequence cooks the discs and glazing the pads, causing the fading you describe.
It's a well documented "feature" of the A8 D2...
The S8 D2 stock brakes are better.
I travel a lot through Germany and drive 125mph very often on those lovely autobahns. Those are the times that you really get confronted with the A8's stock brakes. They scare the living
crap out of you sometimes...
To improve the A8 D2 brakes i went for thermally treated, perforated discs with Ferodo DS2500 pads, front and aft.
That combo works well and survives multiple hard brakes in a short period of time. I'm happy with my brakes now.
My front discs are half gone now (1mm worn off). They lasted for 30.000 miles already so i should be able to do 60.000 miles with them. These thermally treated discs can take so much more that the stock discs.
The D3 A8's stock brakes are much much better.
It's a well documented "feature" of the A8 D2...
The S8 D2 stock brakes are better.
I travel a lot through Germany and drive 125mph very often on those lovely autobahns. Those are the times that you really get confronted with the A8's stock brakes. They scare the living
crap out of you sometimes...
To improve the A8 D2 brakes i went for thermally treated, perforated discs with Ferodo DS2500 pads, front and aft.
That combo works well and survives multiple hard brakes in a short period of time. I'm happy with my brakes now.
My front discs are half gone now (1mm worn off). They lasted for 30.000 miles already so i should be able to do 60.000 miles with them. These thermally treated discs can take so much more that the stock discs.
The D3 A8's stock brakes are much much better.
03-09-2009, 05:35 AM
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"if you are cooking along at a buck twenty and need to loose 40mph right quick"...not that...
...you'd know anything about that. Oh yeah right - in Deutscheland.
Deutscheland.
Def. not here.
Nope. Uh uh.
Deutscheland.
Def. not here.
Nope. Uh uh.
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12-29-2009, 03:40 PM
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I got the same issue, it happnes once in the morning then there fine. I'm doing all new rotors & pads tomorrow. I dont think that the problem, I feel its an issue with the brake booster not filling up with enough vacume. It feels like there's no power assist right, also oddly no abs lights
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