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Brake Pad Questions - 6mm left??

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Old 06-21-2008, 06:05 PM   #1
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Default Brake Pad Questions - 6mm left??

Audi Dealership had a Service special day with free inspection. So took my car there and they checked everything including the codes and everything came clean. (I was happy!!)

They marked the brakes at 6mm left.. What does that mean?? I know my front brakes were changed at about 35K and the rear were changed at 43K.
So how long the OEM brakes are supposed to last??
Any Experiences ??? I am currently at 82K miles.
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Old 06-21-2008, 06:25 PM   #2
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thickness left on pad - thirty-K miles is good out of a set of pads-URDue!
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Old 06-21-2008, 06:37 PM   #3
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you got good life out of those pads....change them
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Old 06-21-2008, 08:29 PM   #4
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Come on, you fat wallet guys! 6mm = ¼", only about 12mm new! Don't change them until they squeal.
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Old 06-21-2008, 08:46 PM   #5
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Default Squeal like a pig!!! Oink Oink :) Or grind .... Is Min spec 5 mm? >

My indicator light came on at about 85 K miles and i am thinking they were the originals ... still had alot of pad left but i changed them anyway ..... but since i am NOT a fat wallet guy .... more like a sqweeky tight wallet ... i did not replace with the high dollar pads ... i used the el cheepo aftermarket indicatorless ... didn't even replace the rears yet as they looked good.

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Old 06-22-2008, 03:00 AM   #6
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Agreed. They can still go a while yet.
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Old 06-22-2008, 05:10 AM   #7
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Default Squeal, grind, both good descriptors. Unless deaf, you'll know when the pad's backing plate...

contacts the unworn annular rings of the rotor! IMO, the active wear sensors are inadequate and just a nuisance. I always cut them off and short out the wires at the pad connector at first opportunity . These active wear sensors only sense wear on 2 of 8 pads, whereas the passive sensors announce a wear limit for any one of all 8 pads. Another reason why worn rotors are superior to new!
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Old 06-22-2008, 07:12 AM   #8
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Default Oh Yes the warning light has not turned on yet... Did you replace...

Pads only or Rotors too??? I have heard that I have to change Rotors everytime I change pads...???
What pads did you use and where did you buy from???
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Old 06-22-2008, 07:14 AM   #9
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Default So you are saying I am only 50% done yet?? since 12mm is on New pads??

I have about 60 to 75% highway driving... Also I let off on the gas and cruise to stop lights to conserve gas.. and brakes...
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Old 06-22-2008, 07:22 AM   #10
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Default Normally I'd agree that one would be deaf to not hear the grind; however, my recent experience

that led to this level of pad wear-out tells me that's not always the case - I never heard nor felt anything (and I'm pretty aware of these things). In tis case I was into the backing plate a bit definitely got my money's worth out of those pads.

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Old 06-22-2008, 07:38 AM   #11
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Default 6mm not panic time, but I'd be getting ready for it soon. New brakes feel so nice.

The thinner they are, the hotter they'll get, and will wear quicker, right?
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Old 06-22-2008, 07:50 AM   #12
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Default And how does one "get ready"? IMO, "new brakes" are inferior to maintained old, because the...

old rotors have worn true. Pad friction material is a poor thermal conductor, relative to metallic materials. The heat transfer path is primarily to the rotor.
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Old 06-22-2008, 07:50 AM   #13
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Yes!
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Old 06-22-2008, 07:55 AM   #14
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Default IMO likely cause, poorly maintained calipers. If the guide pins are stiff or frozen...

the outer pad will wear much faster and not retract. What was the wear on the inner pad?
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Old 06-22-2008, 07:57 AM   #15
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Never (with few exceptions) change rotors!
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Old 06-22-2008, 08:08 AM   #16
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Default That is interesting.. I know when the dealer changed my rear brakes

he changed the rotors too.. and said that was the way it went... The card was in 4 year/50K warranty then and I actually pestered them into replacing the brakes.. I still have the Bill...
So you are saying rotors are never needed to replace?? then why does the dealer insist??
What about those measured tolerances?? (not sure what the numbers are)
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Old 06-22-2008, 08:35 AM   #17
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Default I suspect you are correct - the inners were a bit (not a lot) better, and I had neglected

the brake fluid for too long... but boy did I get my $$ worth out of them pads!!
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Old 06-22-2008, 10:03 AM   #18
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$$$$$$
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Old 06-22-2008, 10:29 AM   #19
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Default Getting ready for me would mean deciding if I want to stay with OEM or maybe upgrading,

which may involve some time searching the forums for what others have chosen, which can lead to the internet ordering process and shipping time. Sounds rather basic to me.
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Old 06-22-2008, 10:35 AM   #20
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Basic=trivial content.
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