Parts for your 2018 Holden Commodore-Brake shoes

2018 Holden Commodore brake-shoes – are they used, and what should owners know?

For the 2018 Holden Commodore (ZB series), brake-shoes aren’t fitted or used. This model runs four-wheel disc brakes and an electric park brake that’s built into the rear calipers, so there’s no drum or “drum-in-hat” parking brake with shoes to service.

Why the change? Compared with earlier Aussie-built Commodores (like VF) that used a small internal drum and shoes for the handbrake, the ZB—sourced from Opel’s Insignia B—uses a motor-on-caliper electric park brake. That setup trims weight, frees up packaging around the rear hubs, and plays nicer with stability control and auto-hold features. It also means there’s nothing resembling a traditional brake shoe on this car.

What should owners focus on instead? Routine brake servicing for a ZB Commodore is all about pads, rotors, brake fluid, and the electric park brake system. A technician will place the EPB into service mode before rear pad changes, retract the caliper actuators with a scan tool, and then recalibrate the system when the job’s done. Typical checks include pad thickness and even wear, rotor condition, brake fluid moisture content (replace roughly every 2 years), slider lubrication, and a road test to confirm smooth operation and no EPB warnings. If the rear brakes squeal, grind, feel weak, or the EPB struggles to hold, it’s time for an inspection.

Technical sources referenced for this conclusion include: factory Holden/GM Service Information for the ZB Commodore rear brake system (motor-on-caliper EPB, no drum-in-hat assembly)