Change rear brake pads bmw r850r

SOURCE: rear brake cylinders are stuck, can not push them in

I have a 2004 SAAB 93 and just finished replacing the brake pads and rotors yesterday. On the piston itself you should have two little notches. You can either or a GM rotor reset tool that will push into the two little notches and push against the piston while rotating it clock wise. Or the way that I did it was to take a C clamp and put the caliper back on the car. Clamp it on the back of the caliper to the front of the caliper so it will remain stationary. Then take a pair of needle nose pliers and rotate the two notches clockwise while pushing into the caliper. It will take some strength but you should be able to push them in. Be sure that you spray the boot around the piston when some WD 40 so it does not crack and or break during the process. If you have any additional questions about this feel free to email me.

James
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SOURCE: CHANGING REAR BRAKE PADS

the best thing you can do is go to an autoparts store and purchase a haynes repair manual for your car. cost about $18, but will show you everything you need to know, with pictures.

SOURCE: BRAKE WARNING LIGHT

I dunno if this will work on your BMW, but on my BMW Z3 and M3, it was....

Turn the ignition key to position 2, but do NOT start the car. Wait for about 45 seconds and the brake warning message will be reset.

If it doesn't reset, then the brake sensor was damage. You will need to replace the brake sensor. It sounds like you replace the brake right after you saw the warning, so the brake sensor should be okay.

SOURCE: Brake Pad Sensor

i have replaced both front/ rear pads, and no matter what the dash light will not go off. I have disconnected both front/rear sensors, and light is still on , any suggestions?

SOURCE: Jeep Commander Rear Brake Pad Installation

Per Chilton Auto repair manual:

Removal & Installation

1. Raise and safely support the vehicle.
   
2. Remove the rear wheel.
   
3. Siphon a small amount of brake fluid from the master cylinder reservoir.
   
4. Insert a small prybar through the caliper opening and pry the caliper cover (using the outboard brake pad) to bottom the piston in the caliper bore.
   
5. Remove the caliper slide bolts.
   
6. Remove the caliper from the anchor.
   
   WARNING Support the brake caliper with mechanics wire. Do not let the caliper hang by the brake hose.
   
7. Remove the brake pads from the caliper.
   

1. Install the brake pads onto the caliper.
   
2. Lubricate the slide pin bolts with grease provided with the brake pads, or suitable silicon grease equivalent.
   
3. Install the caliper on the anchor and tighten the slide pin bolts to 18 ft. lbs. (25 Nm).
   
4. Install the rear wheel.
   
5. Lower the vehicle.
   
6. Pump the brake pedal several times until a firm pedal is obtained in order to properly seat the pads.
   
7. Refill the brake fluid reservoir to the proper level.