bmw 3 series brake disk removal?

Answer 1

1. Unbolt road wheels.

2. Remove caliper by unbolting 2 bolts located behind the disk, the brake pads will drop out as you are doing this. If there is a sensor, you will need to undo it from the pad. You will also need a new sensor (about $10) when you reinstall the pads.

3. Hang caliper unit to the spring or other suspension parts with a zip tie or any suitable cord/wire. Just don't let it hang on the brake hose.

4. Undo hex bolt securing the disk to the hub.

5. If doing rear wheels, make sure to release parking brake (with the other wheels well choked).

6. The disk is now free to come off. But it is usually stuck rusted in place.

7. If you are replacing the disk anyway, use a good hammer and whack it out. A sharp quick whack at the disk friction surface would normally do the trick. It's really the vibration that does it, not the actual force of the hit. So you can even hit it from the outside in.

8. If you are KEEPING the disk for reuse for some reason, use a rubber mallet instead.

Note: it is recommended that you also change out the pads (and sensors) as you change out brake disks. Do it in pairs or all 4. Using new disks on old pads may cause uneven wear which could warp the disk eventually.

Answer 2

You may have to drill out the little useless hex screw holding the disk on the hub. Dont resurface the disks just buy new ones they are pretty cheap on the internet. The hardest part is getting that little sensor back on the brake pad. Make sure you have the correct size hex key/wrench for the calipers before you pull the wheels off. I cant remember the size but I think it is a 7 MM.