Xtool Rear Parking Brake

[Gamble52]

Putting the electronic rear parking brake into service mode using an Xtool VAG401. Total time from start to finish was about 1 hour which includes jacking the car up and removing the rear wheels.

Connect a battery charger to the car. Turn the ignition on but don't start the car. Plug the Xtool into the OBDII slot and select Diagnose.

Select Special Function

Scroll down until you see Brake Pad Replacement. Select Brake Pad Replacement.

I have a 2010 Audi A5 so I selected Other Models.

Select Replacement of Brake Pads

At this point you want to press the parking brake button down to release the rear brakes. Then press enter.

You will start to hear the electronic parking brake motor start to back out.

The light on the parking brake button will slowly flash, and the "brake" light on the cluster will slowly flash as well. Now you're ready to replace your brake pads!

I wedged a flathead screw driver in between the brake piston and the old brake pad and leveraged the piston back into the caliper.


I used a 13mm socket for the back bolt, and a 15mm box wrench to hold the nut down.

Replace the old brake pads with the new ones.

Reverse the steps that you took to remove the pads and reinstall the caliper. Check everything and put the wheels back on.

Now go back to the Xtool. The screen is still displaying the old message of replace the rear the pads for the two rear wheels. Just hit enter on the Xtool. The electronic brake is moving back into position.

When the electronic brake stops, the Xtool will say "Replace brake pad success". The brakes are still not applied. The motorized piston just pushes back out until it reaches the new pads.

I turned the ignition off, then back on/started the car. I exited all menus on the Xtool, then I lifted the parking brake button to activate the electronic rear parking brake. Success!


Chris

[beckmaster]

you are a god amongst men.....thanks for this awesome writeup.

[Westea]

Do you know if this tool work with a b8.5 s5? For the rear brakes?


Sent from my iPhone using Audizine

[Augy]

Great write up. I can confirm it worked on my 2013 Q5 Premium Plus 2.0. Much easier than I expected. FWIW, the Brembo front brakes are about as easy and fool-proof as I've ever changed. With the XTool and the directions above, all 4 corners took about 2 hours with a trip to Walmart to get a better battery charger/maintainer (my old one didn't have long enough leads to reach the remote battery posts). Thank you for the write up!!

[S5Black]

Product description says it works on all Audi/VW 1996 and newer.

[nghiaho58]

Why would you need the battery charger/maintainer to replace the rear brake pads? Should the car battery good enough to provide the power? Please help me to understand. Thanks.

[JamesRS5]

The Brake Control module you are communicating with is very sensitive to voltage, if the battery dies during this procedure you will be at the dealership buying a replacement.

[Edenma]

7/30/2021 rear break replacement in Audi Q5 2015. Worked perfectly!! Thank you Gamble52 you Sire are a Gentleman and a Scholar!!