brake pads worn?

matrixabc · 04-26-2004, 11:17 AM

I checked my front pads at the weekend, and noticed they are fitted with pad sensors, there is a small triangler tab at the top of the one with the sensor in, and the disc has started to grind this away, are they reliable?, I assume it should alarm if they are to low, I would have thought with one on each side one of them should have alarmed by now?
At £130 a set I want to weight until they need replacing( but I am getting brake fade if I slow down from 120Mph + into a roundabout)

Karpedmman · 04-26-2004, 11:19 AM

The wire has to be broken in order for the light to turn on the dashboard.

escapA8 · 04-26-2004, 12:57 PM

cuatrokoop · 04-26-2004, 06:54 PM

If it's been two years or more since your last brake fluid flush/fill, do that when you change the pads and/or rotors. New fluid can help reduce fade, especially if you use a better than factory fluid (look for high dry and wet boiling points).

JimR · 04-26-2004, 09:06 PM

Jkay · 04-27-2004, 11:49 AM

comes from your brake fluid boiling, not partially worn pads. Once you boil your fluid the first time, it is damaged and boils at 70f LOWER temperature every time after that.

You've simply trashed your fluid, and need to replace it, that's all.

Beyond the fluid boiling, water gets into the lines as well and of course water boils at a much lower temperature than brake fluid, so that adds to the mushy feel.

Old, or previously boiled brake fluid is the cause here.

Racing brake "people" recommend changing your fluid BEFORE and AFTER a track event. Before, because it's old, and after, because it is trashed.

04-26-2004, 11:17 AM	#1
matrixabc New Member Account #: 62413 Join Date: Sep 2003 Posts: 175	brake pads worn? I checked my front pads at the weekend, and noticed they are fitted with pad sensors, there is a small triangler tab at the top of the one with the sensor in, and the disc has started to grind this away, are they reliable?, I assume it should alarm if they are to low, I would have thought with one on each side one of them should have alarmed by now? At £130 a set I want to weight until they need replacing( but I am getting brake fade if I slow down from 120Mph + into a roundabout)

04-26-2004, 11:19 AM	#2
Karpedmman Junior Member Account #: 53868 Join Date: Apr 2003 Posts: 525	Re: brake pads worn? The wire has to be broken in order for the light to turn on the dashboard.

04-26-2004, 12:57 PM	#3
escapA8 Member Account #: 31455 Join Date: Jan 2002 Posts: 2,158	Right, and no sensors on the rear brake pads supposedly... __________________ escapA8 = escapade 1997 A8 3.7 FWD Tiptronic by PaulW & tozoM8 Bilstein Shocks - Eibach Springs Ferodo DS2500 Brake Pads

04-26-2004, 06:54 PM	#4
cuatrokoop AudiWorld Super User Account #: 28712 Join Date: Nov 2001 Posts: 17,291	I don't know too many factory Audi braking systems that WOULDN'T fade when slowing from 120mph. If it's been two years or more since your last brake fluid flush/fill, do that when you change the pads and/or rotors. New fluid can help reduce fade, especially if you use a better than factory fluid (look for high dry and wet boiling points). __________________ http://cuatrokoop.audi-quattro.org/intro.htm "SECRETARY OF ENERGY AND AE ASSWHIPPINGS: We call him when we need a big plane that kills people."

04-26-2004, 09:06 PM	#5
JimR Member Account #: 1018 Join Date: Mar 2000 Posts: 46,941	It isn't supposed, there just flat aren't any rear brake pad sensors. Period. __________________ JimR '07 A3 3.2q Lava Gray '99 A8 4.2q Pearl White '99 A6 Avant 2.8q Silver (My old car, son now drives) '06 Boxster S Guards Red (wife's wheels) Support the troops "Over the years, I have come to understand a critical difference between the world of fear and the world of freedom. In the former, the primary challenge is finding the inner strength to confront evil. In the latter, the primary challenge is finding the moral clarity to see evil."

04-27-2004, 11:49 AM	#6
Jkay Member Account #: 55364 Join Date: Apr 2003 Posts: 2,300	Brake fade ... comes from your brake fluid boiling, not partially worn pads. Once you boil your fluid the first time, it is damaged and boils at 70f LOWER temperature every time after that. You've simply trashed your fluid, and need to replace it, that's all. Beyond the fluid boiling, water gets into the lines as well and of course water boils at a much lower temperature than brake fluid, so that adds to the mushy feel. Old, or previously boiled brake fluid is the cause here. Racing brake "people" recommend changing your fluid BEFORE and AFTER a track event. Before, because it's old, and after, because it is trashed. __________________ ------------------------------------- 18" 2006 Soft 5-Spokes - Goodyear F1s - Milltek Exhaust - Clear Sides & Corners

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