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2006 STS with JE5 brake package and 72,000 miles on the odometer.

Passenger side rear wheel has begun to show excessive amounts of brake dust compared to other 3 wheels. Brake pads and rotors replaced about 10K miles ago on all four wheels and problem began about 2K miles ago.

I expect to see the front wheels showing more dust than others but that is not the case, why is the passenger side Rear wheel showing up to 3 times more dusting?
 

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2006 STS with JE5 brake package and 72,000 miles on the odometer.

Passenger side rear wheel has begun to show excessive amounts of brake dust compared to other 3 wheels. Brake pads and rotors replaced about 10K miles ago on all four wheels and problem began about 2K miles ago.

I expect to see the front wheels showing more dust than others but that is not the case, why is the passenger side Rear wheel showing up to 3 times more dusting?
Did you ever resolve? I have 2006 with same issue.
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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I doubt that you'll get a reply - HRC hasn't logged in for 4 years. Look at the post dates.
 

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2008 STS Northstar RWD, 2000 Trans Am WS6 6 spd, 1968 LeMans convertible 6.6
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Have someone look at your brakes, S-Yearout. You may have a caliper that is dragging or a brake hose acting like a one-way check valve. Or, there could be no real issue. If something is dragging, causing the dust, it should show up as faster brake wear on that side.
 
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