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      09-29-2012, 08:06 AM   #6
Humbug
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Guernsey
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Drives: X3 F25 xDrive 20d Auto
Join Date: Jun 2011
Location: Guernsey, Channel Islands

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To answer my own question, I have just replaced my rear pads at 20,000 miles.

The car was telling me that I had 800 miles left on the pads but when I took them out they have about 1/4" of pad left so I could have left them to go a bit longer.

Replacement was pretty straightforward. The pistons do need to be would back in but they don't need to be done electronically and nor do they need a G clamp or special tools of any kind. I just used a pair of pliers inserted in two if the three indents in the face of the piston.

Note that the pads are not all the same. There is an inside pad and an outside pad. They are the same shape but there are two small domes on the back of the pads and they are closer together on the outside pad and further apart on the inside.

Once done re-set the service warning via the button on the bottom left of the instrument cluster.
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