Parts for your 2020 Holden Commodore-Rack boots

2020 Holden Commodore rack-boots

Rack-boots are fitted to the 2020 Holden Commodore (ZB). This is documented in GM Global Service Information for the ZB Commodore/Opel Insignia B (procedures covering Steering Linkage Inner Tie Rod Replacement and Steering Gear Boot Clamp Replacement), and shown in the GM Electronic Parts Catalogue exploded views of the electric power steering rack with bellows on each end. Major aftermarket catalogues for the Insignia B/Commodore from brands such as ACDelco, Gates, and Febi Bilstein also list steering rack boot kits for 2018–2020 models, confirming they’re used on this vehicle.

On the ZB Commodore, the rack-boots (also called bellows or gaiters) protect the electric rack-and-pinion steering gear from dust, water, and road grit, and shield the inner tie rod joints. They keep the good stuff in and the bad stuff out, so the steering stays smooth and the expensive electric rack isn’t chewed out by contamination.

As part of regular servicing, it’s smart to give the boots a look every service or roughly each 10,000–15,000 km. What to watch for:

• Splits, cracks, or perishing of the rubber
• Loose or missing boot clamps
• Wetness inside the boot or evidence of grit ingress

If a boot is torn, it should be replaced promptly. Driving with a split boot can let water and grit into the rack, which can damage the inner tie rod joint and, on an EPS rack like the Commodore’s, risk costly steering gear issues. Quality matters here—use a genuine or reputable aftermarket boot and the correct style clamps rather than cable ties.

Replacement is straightforward for a workshop: the outer tie rod end is removed, the old clamps and boot come off, the area is cleaned, and the new boot and clamps are fitted, then the tie rod end goes back on. A couple of tips enthusiasts appreciate:

• Don’t pack the boot with grease—these boots aren’t meant to be filled.
• Avoid twisting the boot, align it so it expands and contracts freely on steering.
• Mark the tie rod threads and count turns on refit, then get a wheel alignment check—cheap insurance for tyre life.

With decent boots in good nick, the ZB’s steering stays tight, quiet, and protected from Aussie and Kiwi road grime, beach air, and the odd muddy detour.

Does the 2020 Holden Commodore actually have rack-boots?

Yes. The ZB’s electric rack-and-pinion steering uses bellows on both ends to protect the rack and inner tie rods. This setup is shown in GM service procedures and the GM parts catalogue, and widely supported by aftermarket parts listings.

How often should the rack-boots be checked?

Have them inspected at each service or about every 10,000–15,000 km. Look for splits, perishing, or loose clamps. Early replacement of a dodgy boot prevents grit and water from wrecking the steering gear.

Can they be replaced without an alignment?

A careful tech can refit the outer tie rod end to its original position, but it’s still wise to get an alignment check afterwards. Even a small toe change can cost you tyres in no time.