Put the Electronic Parking Brake into Service Mode

Last updated: June 12, 2026

The Land Rover Defender (L663, 2020–Present) uses motor-on-caliper electronic parking brakes (EPB) at the rear. Before fitting new rear pads you have to retract those actuators electronically, and the L663 lets you do it yourself with the built-in brake service mode — a routine pad change does not need Pathfinder or a dealer scan tool.

What brake service mode does and why you need it

On the new Defender each rear caliper carries its own electric motor. When you park, that motor winds the piston out to clamp the disc and locks it there; ordinary brake-pedal pressure will not move it back. Brake service mode commands the actuators to wind fully back and keeps the EPB from re-applying, giving the clearance to lift the caliper and seat thicker new pads.

How to enter brake service mode (Defender L663)

1. Park level, chock a front wheel and select P.
2. Press Start without the brake pedal so the ignition is ON but the engine is off.
3. Release the parking brake first — press the EPB switch until the red PARK light goes out.
4. Press and hold the EPB switch in the release position for about two seconds.
5. Still holding it, press the accelerator flat to the floor (wide-open throttle) and hold for two seconds.
6. While holding both, press Start to switch the ignition OFF, then immediately press it again to switch ON.
7. Keep holding both until the cluster shows the brake service message; the rear actuators whirr as they retract. Then release the accelerator and EPB switch.

With the actuators wound back you can remove the lower caliper bolt, hinge the caliper up and change the pads.

Never force the pistons back by hand

Do not lever, push or wind the EPB piston back manually, and never use a hydraulic wind-back tool against a powered caliper. The piston is driven by a geared electric motor, not loose hydraulics — forcing it shears the gears and ruins a caliper that costs far more than the pads. Retract electronically only via service mode, or, if the sequence won’t engage, with a generic OBD EPB tool that has Land Rover coverage. Never improvise on the piston with hand tools.

Exit service mode and bed in the new pads

After reassembly, exit by repeating the sequence with the EPB switch held in the apply position instead of release; the actuators re-tension and the service message clears. Press the brake pedal firmly several times so the pistons take up the new pads before driving. Bed in with 6–8 firm slowdowns from about 30 mph to a crawl, leaving a cooling gap between each, then drive gently for the first 200 miles while the friction material cures.

Frequently Asked Questions

Do I need Pathfinder to change Defender rear pads? No. The in-car brake service mode retracts the EPB for a standard pad change. A generic OBD EPB tool is only a fallback if the sequence won’t take.

Why won’t my Defender enter service mode? The parking brake must be released first, and you have one attempt per ignition-on cycle. If it fails, switch fully off, then on, and start again.

Does the engine need to be running? No. Ignition ON with the engine off is correct, and the brakes stay in service mode until you exit.

Can I unplug the actuator instead? No — unplugging does not wind the piston back and can set an EPB fault. Use service mode or an EPB tool to retract it properly.

How do I confirm it worked? Watch for the brake service message on the cluster and listen for the actuator whirr before opening the caliper.

If an EPB or ABS warning stays on after the job, read the stored code first at autodtcs.com to tell a real actuator fault apart from a service-mode message that just needs clearing.