Parts for your 2005 Holden Astra-Strut mounts

2005 Holden Astra strut mounts — what they do and when to replace them

On the 2005 Holden Astra (AH series), strut mounts are absolutely relevant and used on the front suspension. Technical sources including the Holden/GM Astra AH workshop/service manual (front suspension: MacPherson strut with upper mount and bearing) and major aftermarket catalogues (Monroe, KYB, Sachs) list front strut top mounts and bearings for this model. The rear uses a torsion beam with separate shock absorbers, so “rear strut mounts” don’t apply in the same way.

Up front, the Astra’s MacPherson struts rely on the strut mounts to fasten the strut assembly to the body and to isolate noise and vibration. The mount usually incorporates a bearing so the strut can rotate smoothly as the wheels are steered. That bearing takes a beating over Aussie and Kiwi roads, so when it wears, owners often notice creaks, knocks over speed humps, and a notchy feel through the steering wheel.

As part of routine servicing, it’s smart to check the strut tops for perished rubber, split dust boots and any play or binding in the bearing. Many technicians recommend replacing strut mounts whenever new front struts are fitted, because reused worn mounts can transfer noise into a fresh damper and shorten its life. Replacing in pairs (left and right) keeps handling even.

• Typical signs they’re due: clunks on rough roads, a twang or groan while turning, steering that won’t self-centre smoothly, and feathered tyre wear at the front.
• Good practice: inspect at around 80,000–120,000 km, earlier if the car sees rough roads or speed bumps daily.
• When fitting: use quality mounts with the integrated bearing, renew the dust boot and bump stop, torque fasteners at normal ride height, and get a wheel alignment afterwards.
• DIY note: a spring compressor is required to swap mounts on the strut. If that sounds dicey, let a pro handle it.

Look after the Astra’s strut mounts and the car steers more precisely, rides quieter, and keeps tyres wearing nicely. Ignore them and they’ll often make themselves heard — loudly — before long.

FAQ: Do all 2005 Holden Astras have strut mounts?

Yes, at the front. The AH (2005) uses MacPherson struts with an upper mount and bearing. The rear uses shocks on a torsion beam, so there’s no rear “strut mount” in the same sense — just upper and lower shock mounts/bushes.

FAQ: What are the most common symptoms of worn strut mounts on an Astra?

Owners typically notice clunks or creaks over bumps, a notchy feel when turning the wheel, or a spring “twang” when parking. You might also see uneven front tyre wear or hear a dull thud on take-off and braking.

FAQ: Should strut mounts be replaced with the struts?

It’s a good idea. Replacing mounts and bearings when doing front struts saves double labour, prevents transferring noise into the new dampers and usually gives a better steering feel. Always finish with a wheel alignment.