Parts for your 2018 Holden Commodore-Strut mounts

2018 Holden Commodore strut-mounts

Yes — strut-mounts are relevant and used on the 2018 Holden Commodore (ZB). Technical references including GM Service Information for the ZB platform (shared with the Opel Insignia B) specify a MacPherson strut front suspension with an upper insulator/bearing assembly, i.e., a front strut-mount. Holden/GM parts catalogues list a dedicated front strut top mount and bearing for ZB variants, confirming fitment across the range.

On this Commodore, the front strut-mount does a few big jobs. It locates the top of the MacPherson strut in the body, supports vehicle loads, and houses a bearing so the strut can swivel smoothly as the wheels steer. It also isolates vibration and road harshness from the cabin, helping keep NVH in check. When the mount or its bearing wears, owners often notice clunks over bumps, groans when turning, heavier or notchy steering, or feathered tyre wear from poor strut control.

As part of regular servicing, it’s smart to have the front strut-mounts and dust boots inspected whenever the front suspension or tyres are checked — especially after 80,000–120,000 km or if the car often tackles rough roads. Look for perished rubber, split boots, excessive top-hat movement, or rust marks around the mount. If one side is due, replacing mounts in pairs keeps steering feel even. Always follow Holden/GM torque specs and use new self-locking hardware where specified.

Replacing strut-mounts involves compressing the coil spring and transferring the mount and bearing to the strut (or fitting new replacements). Because there’s stored energy in the spring and many ZB models use torque-to-yield fasteners, a quality spring compressor and correct procedures are essential. Most owners will be better off having a qualified technician handle it. After any strut or mount work, a wheel alignment is a must to protect tyres and restore straight-line stability.

While the rear of the 2018 Commodore uses an independent multi-link layout with separate shocks and springs (including the AWD variants), the classic steering-bearing “strut-mount” design is only at the front. If chasing knocks at the back, the technician will instead check rear shock upper mounts and links.

• Typical symptoms: clunking/creaking over bumps, notchy steering, vibration, tyre feathering.
• Best practice: replace in pairs, renew hardware, and complete a wheel alignment.
• Consider OE or premium aftermarket mounts with integrated bearings for longevity and quiet operation.

Popular questions about 2018 Holden Commodore strut-mounts

Do all 2018 Commodores have front strut-mounts?
They do. Every ZB Commodore variant runs a MacPherson strut front end, which uses a rubber-isolated top mount with an integrated bearing. The rear suspension is a different design and doesn’t use a steering-type strut-mount, though it still has upper shock mounts that can also wear.

How long should the front strut-mounts last?
In typical Aussie and Kiwi conditions, many last 80,000–160,000 km, but life varies with road quality, load, and wheel/tyre choices. If you’re hearing knocks, feeling gritty steering at parking speeds, or seeing uneven tyre wear, have them checked sooner rather than later.

Can they be replaced at home?
It’s possible with the right tools, but not ideal for first-timers. The job needs a safe spring compressor, correct torque procedures, and an alignment afterwards. A workshop can also spot related parts worth renewing at the same time, like dust boots, bump stops and upper bearings.