Parts for your 2020 Holden Commodore-Steering bushes

2020 Holden Commodore steering bushes — are they a thing?

Short answer: no — the 2020 Holden Commodore (ZB) doesn’t use serviceable steering bushes. On this model, the electric power steering (EPS) rack bolts rigidly to the front subframe, so there are no separate “steering rack bushes” to replace like you’d find on older Aussie Commodores.

Why’s that the case? Modern EPS systems are designed around a stiff, direct mount for precise steering feel and to keep advanced driver assistance systems happy. Any soft bushing between the rack and subframe can add compliance, upsetting on‑centre feel, calibration and lane‑keeping accuracy. The ZB’s steering gear is a sealed ZF/GM EPS unit, mounted with high-tensile bolts directly to the subframe.

Technical references back this up: GM’s Global Service Information (GSI) procedure for Steering Gear Replacement on the E2XX platform (Buick Regal/Opel Insignia/Holden Commodore ZB) shows the rack fastening directly to the subframe without separate insulators. Likewise, the Holden/GM Electronic Parts Catalogue lists the EPS steering gear as a complete assembly with mounting hardware, and no rack-mount bush kits for ZB. Major aftermarket bush specialists list control arm and sway bar bushes for ZB, but not steering rack bushes — another strong indicator they’re not a service item on this platform.

If someone’s asked for “steering bushes” on a 2020 Commodore, what they probably need is one of the usual wear items elsewhere in the front end. Typical culprits for knocks, looseness, or vague steering are:

• Front lower control arm bushes (front or rear positions)
• Sway bar links and D‑bushes
• Inner and outer tie‑rod ends
• Strut top bearings/mounts
• Intermediate steering shaft play

For servicing, a workshop should road test for steering feel and NVH, check tie‑rod end play, inspect control arm bushes for cracking or fluid loss (if hydro-bushed), and confirm sway bar links aren’t knocking. If the EPS rack itself is faulty, the fix is rack replacement. That job needs the correct one‑time‑use fasteners where specified, a wheel alignment after reassembly, and a steering angle sensor reset with a scan tool. Battery voltage support during any EPS work is also wise to prevent fault codes.

Bottom line: there’s no steering-bushes kit for the 2020 Holden Commodore. Focus inspections on the actual wear points above, and keep the rack mounted as designed for the sharp steering these cars are known for.

FAQs

Can steering bushes be fitted to a 2020 Holden Commodore?
No. The ZB’s EPS rack mounts directly to the front subframe without replaceable rack-mount bushes. The design relies on a rigid interface for steering precision and driver-assist calibration. If there’s play or noise, attention should shift to tie‑rods, control arm bushes, sway bar links or strut tops.

What usually causes a steering knock on a ZB Commodore if it’s not rack bushes?
Most commonly: worn sway bar links, tired front lower control arm bushes (especially rear position), or inner/outer tie‑rod wear. Less often, a strut top bearing, an intermediate shaft joint, or a loose subframe/rack bolt can be to blame. A thorough inspection on a hoist while an assistant rocks the wheel will pinpoint it quickly.

Does replacing the EPS rack need programming or alignment?
Yes. After rack replacement or any subframe movement, a full wheel alignment is required. The steering angle sensor should be reset/calibrated with a scan tool, and specified rack/subframe bolts replaced if they’re torque‑to‑yield. Keeping stable battery voltage during the job helps avoid EPS fault codes.