How to Change Brake Pads on EPB Cars (CR Max P)

How-To Guide

By iCarsoft Technical TeamJuly 7, 20267 min read

If your car has an electronic parking brake (EPB) — a little switch instead of a handbrake lever — you can’t just wind the caliper back and fit new pads. The piston is driven by a motor, so you first have to put the caliper into service mode with a scan tool. Here’s the full step-by-step using an iCarsoft CR Max P — the exact job in the video below.

Quick Answer

On an EPB car you must retract the caliper with a scan tool before changing pads. With the CR Max P: engine off, ignition on → open EPB service → Release to Service Position (pistons retract) → fit the new pads → Exit Maintenance Mode (pistons close) → Parking Brake Activation, clear codes, test. Never force the piston back by hand.

Key takeaways

EPB calipers are motor-driven — a scan tool is required, not optional.
Two service commands do the work: Release to Service Position and Exit Maintenance Mode.
Engine off, battery healthy (~12.5 V) — low voltage can fail the procedure.
The parking-brake switch is disabled while in service position — that’s normal.
Owning a CR Max P means no repeat garage EPB-reset fees.

What an EPB is

An electronic parking brake (EPB) replaces the old cable handbrake with an electric motor built into each rear caliper (or a small motor pulling a cable). You set it with a switch, and the ECU clamps and releases it. It’s convenient — but it means the rear caliper pistons won’t wind back the old way when it’s time for new pads.

Why you need a scan tool

On a normal caliper you’d wind the piston back with a tool. On an EPB caliper the piston is motor-driven, so it has to be commanded back electronically. Force it and you can wreck the EPB actuator and set faults. A scanner with an EPB service function — like the CR Max P — puts the caliper into a service/maintenance position so you can safely swap pads, then closes it back onto the new ones.

iCarsoft CR Max P EPB service menu with Parking Brake Pad Replacement options — The CR Max P EPB menu: Release to Service Position, Exit Maintenance Mode, Activation and more.

Which cars have an EPB

Most European and many newer cars from roughly 2010 onward: BMW, Mercedes-Benz, Audi, VW, Land Rover/Range Rover, Volvo, Ford, Vauxhall/Opel and more. The giveaway is a small P switch on the console instead of a handbrake lever. The CR Max P covers EPB service across 58 brands — check the product page for your exact make and model.

What you’ll need

An iCarsoft CR Max P (with EPB service).
New brake pads (and discs if worn).
Jack and axle stands, wheel and brake tools.
Brake cleaner and a smear of copper/ceramic grease.
A healthy battery — around 12.5 V.

Watch the job

Video credit: How to Change Brake Pads on EPB Cars Using the iCarsoft CR Max P, by SA Diagnostic’s. Independent third-party demonstration.

Step-by-step

Prepare the car. Level ground, engine OFF, healthy battery (~12.5 V). Plug the CR Max P into the OBD port and set the ignition to ON.
Open the EPB service function. Select your vehicle, then open the EPB (Electronic Parking Brake) menu.
Release to service position. Run “Parking Brake Pad Replacement — Release to Service Position.” The caliper pistons retract, giving room for new pads.
Change the pads. Remove the wheel and caliper, swap in the new pads (and discs if needed), and reassemble. Clean and grease the contact points.
Exit maintenance mode & re-activate. Run “Exit Maintenance Mode” so the pistons close onto the new pads, then “Parking Brake Activation.” Clear any codes and test the parking brake before driving.

iCarsoft CR Max P prompting to set the ignition switch to ON before the EPB procedure — Set-up prompt: engine off, ignition on, voltage checked before the tool runs the procedure.

📷 Image — upload here in ShopifySuggested alt: iCarsoft CR Max P Release to Service Position operator message for EPB brake pad replacement

“Release to Service Position” — the caliper opens up so you can fit the new pads.

iCarsoft CR Max P clearing fault codes after the EPB brake pad service — Finish by exiting maintenance mode, re-activating and clearing any codes.

iCarsoft CR Max P — $599.99

EPB service + oil reset, SAS, DPF and more across 58 brands. Price at time of writing.

Shop the CR Max P →

Warnings & tips

Engine off, ignition on — the procedure needs the car awake but not running.
Battery ~12.5 V — low voltage can abort the reset; put a charger on if unsure.
Never force the piston back by hand — always use the service function.
The parking-brake switch is disabled in service position (by design) — don’t panic.
Always exit maintenance mode and re-activate, then test before driving.

Safety: support the car on axle stands, never rely on the jack alone, and confirm the parking brake works before you drive away.

Cost saving

Garages charge labour plus a diagnostic/EPB-reset fee every time the rear pads are done. With your own CR Max P you do the EPB service yourself — and reuse the same tool for oil resets, service lights, DPF and diagnostics. For most owners it pays for itself within a couple of jobs.

Frequently asked questions

Can I change brake pads on an EPB car without a scan tool?

No. The caliper piston is motor-driven, so it won’t wind back by hand. You need a tool with an EPB service function (like the CR Max P) to release it to service position and close it back afterwards.

What happens if I force the EPB piston back manually?

You risk damaging the EPB motor and gearbox and setting fault codes. Always use “release to service position” first and “exit maintenance mode” after.

Which cars have an electronic parking brake?

Most European and many newer cars from about 2010 on — BMW, Mercedes, Audi, VW, Land Rover, Volvo, Ford, Vauxhall and more. A P switch instead of a handbrake lever means EPB.

Does the CR Max P support my car’s EPB?

It covers EPB service across 58 brands plus oil reset, SAS and DPF. Check the product page’s coverage for your make, model and year.

Why doesn’t the parking-brake switch work during the job?

It’s disabled on purpose while the caliper is in service position, so it can’t clamp. It returns after “Exit Maintenance Mode” and “Parking Brake Activation.”

How much can I save doing it myself?

You skip the garage’s labour and EPB-reset fee each time. A CR Max P usually pays for itself within a couple of brake or service jobs.

Disclaimer: General guidance — verify the exact procedure and torque specs for your vehicle, and if you’re not confident working on brakes, use a qualified technician. Brakes are safety-critical. The embedded video is an independent third-party demonstration. Prices are accurate at the time of writing.