[mistryn]

I have replaced front brake pads & on all my previous cars but never kept long enough to replace the rears. But my OBC is showing 1k till they need replacing and plan on replacing them this weekend.

Do I need a caliper rewind tool? On previous cars I have managed to push the piston back in with my hands but never done this on rears?

Also can anyone tell me if I can reset the service light for the rear pads myself or does it have to be plugged into a computer?
(I have seen a guide for a E90 in my search but don't know if this works on the E92)

[MEGA]

The guide works on E92.

You'll need to rewind the calipers. I doubt you'll be able to do it by hand although there may be a way.

Make sure you get a wear sensor also.

I did the rears on my E90, there were no issues. I followed a guide I found on this site in fact.

[mistryn]

is there a specific rewind tool I need?

[xenon]

You don't need a caliper wind-back tool at all, they push back.

[Mike in Hampshire]

Originally Posted by xenon

You don't need a caliper wind-back tool at all, they push back.

Agreed, I did mine recently just pushing the piston back in. But, as I found, you must renew the sensor even if it isn't heavily worn. Not a difficult job - there's a good guide on the DIY section of the US forum.

Mike.

[xenon]

The only car in the BMW stable that needs a caliper wind-back tool is the Mini.

[mistryn]

Thanks guys, Ive already got a new sensor. Discs are not looking too bad and i think I can get another pad cycley out of them. I will print off that guide and just have it by my side if I get stuck but I think I will be ok.

Another thing I read the metal pin can be a pain to get off, is this the case here?

I can save the money not having to buy a caliper rewind tool lol

[parapaul]

Really? I'm very surprised - and pleased - to hear that!

[Mike in Hampshire]

Originally Posted by mistryn

I will print off that guide and just have it by my side if I get stuck but I think I will be ok.
Another thing I read the metal pin can be a pain to get off, is this the case here?

The one I followed was by "Mr 5" I think. His method was to undo the two bolts that secure the caliper, and they are torqued to something like 80 lb/ft and yes, they were difficult to shift, I used a proper torque wrench with lots of leverage. The advantage of this method is that the caliper comes apart and you can get everything cleaned up.

Anyway, there was nothing too difficult. Doing both sides took me about 90 minutes, going very slowly since I'd not done this before on this car.

Mike.

[e92_alex]

Do the pads visually look like they need changing?

My i-Drive is telling me the front pads have 900 miles and the rears are 700 miles. But for the last 1000 miles these values haven't moved and I can see the pads have at least 8-10mm left.

[greatbm]

Originally Posted by e92_alex

Do the pads visually look like they need changing?

My i-Drive is telling me the front pads have 900 miles and the rears are 700 miles. But for the last 1000 miles these values haven't moved and I can see the pads have at least 8-10mm left.

New pads are approx 12mm so not much wear. My light came on at approx the 1000 mile left about 5mm @ 19000 miles kept an eye out till approx 3mm and changed, reset after change and mileage due went to 21000. New set have lasted 23000 miles at present with car showing 4000 to go still no light as yet

[mistryn]

Originally Posted by e92_alex

Do the pads visually look like they need changing?

My i-Drive is telling me the front pads have 900 miles and the rears are 700 miles. But for the last 1000 miles these values haven't moved and I can see the pads have at least 8-10mm left.

ive had a look when I had my wheels off to paint the calipers, have about 2-3mm remaining

[mistryn]

Originally Posted by Mike in Hampshire

The one I followed was by "Mr 5" I think. His method was to undo the two bolts that secure the caliper, and they are torqued to something like 80 lb/ft and yes, they were difficult to shift, I used a proper torque wrench with lots of leverage. The advantage of this method is that the caliper comes apart and you can get everything cleaned up.

Anyway, there was nothing too difficult. Doing both sides took me about 90 minutes, going very slowly since I'd not done this before on this car.

Mike.

This is the guide I was intending to follow
http://www.e90post.com/forums/showthread.php?t=473763

Do you have a link to the other guide Mike?

[e92_alex]

Originally Posted by greatbm

New pads are approx 12mm so not much wear. My light came on at approx the 1000 mile left about 5mm @ 19000 miles kept an eye out till approx 3mm and changed, reset after change and mileage due went to 21000. New set have lasted 23000 miles at present with car showing 4000 to go still no light as yet

mmm, maybe my visual 8-10mm is wrong!.. If a new pad has 12mm. The car has done 22000miles. I got it when it had 4000 miles on it.

I'll measure them properly

[Mike in Hampshire]

Originally Posted by mistryn

This is the guide I was intending to follow
http://www.e90post.com/forums/showthread.php?t=473763

Do you have a link to the other guide Mike?

Try this:
http://www.e90post.com/forums/showthread.php?t=76418

Mike.

[mistryn]

Thanks Mike for the link
Im just slightly worried about the metal retaining clip getting it off and putting it back on without causing injury to myself lol

[greatbm]

Originally Posted by e92_alex

mmm, maybe my visual 8-10mm is wrong!.. If a new pad has 12mm. The car has done 22000miles. I got it when it had 4000 miles on it.

I'll measure them properly

Are you measuring the full pad with backing plate or just the friction material. Sizes I have quoted are for friction only

[m1bjr]

Originally Posted by parapaul

Really? I'm very surprised - and pleased - to hear that!

Paul, cars that employ the rear calipers to also work as handbrakes will have pistons that wind out to remove the slack.

All BMW have a pair of handbrake shoes inside the rear 'drum' part of the rear discs.

HTH?

Steve

[Mike in Hampshire]

Originally Posted by mistryn

Thanks Mike for the link
Im just slightly worried about the metal retaining clip getting it off and putting it back on without causing injury to myself lol

Ha! I know what you mean, it does go "ping" when you lever it off. You have to apply a fair bit of force too. Getting it back on is easier, however.

Mike.

[parapaul]

Originally Posted by m1bjr

Paul, cars that employ the rear calipers to also work as handbrakes will have pistons that wind out to remove the slack.

All BMW have a pair of handbrake shoes inside the rear 'drum' part of the rear discs.

HTH?

Steve

presumably that has the added benefit that if the handbrake shoes aren't then also being used as rear brakes, they last virtually for ever?