Parts for your 2017 Holden Astra-Strut mounts

2017 Holden Astra strut-mounts — what they do and when to replace

Per GM Global Service Information for the Astra-K platform (the 2017 Holden Astra BK) and common aftermarket catalogues from KYB and Monroe, the front suspension is MacPherson strut. That design uses strut-mounts (top mounts with an integrated or companion thrust bearing) at the top of each front strut. The rear of most 2017 Astra variants uses a separate shock and spring arrangement, so “rear strut-mounts” aren’t applicable, only upper shock mounts are used at the back.

On the 2017 Holden Astra, the front strut-mounts do two big jobs. First, they isolate road noise and vibration from the body, keeping the cabin quiet and tidy over rough Kiwi and Aussie roads. Second, the mount’s bearing lets the strut rotate smoothly as the steering turns, keeping steering feel light and consistent. When the rubber in the mount hardens or splits, or the bearing gets dry or notchy, owners will often notice clunks over bumps, a graunchy feel at the wheel, or vague steering on-centre.

As a wear item, front strut-mounts generally last well, but high kilometres, harsh potholes, and heat can age them. Many technicians check them whenever front tyres, brakes, or struts are serviced, and expect attention somewhere after 80,000–120,000 km depending on use. Because they work hand-in-hand with the strut and spring, they’re commonly replaced at the same time as front struts to restore the whole assembly.

Replacement is straightforward for a trained tech but involves safely compressing the front coil spring. Best practice on the Astra is to replace strut-mounts in pairs, use quality mounts that include or match the thrust bearing, and observe the mount’s orientation marks during assembly. After refitting, a wheel alignment is recommended to keep tyre wear even and steering sweet. It’s also a good moment to inspect the front upper spring seats, dust boots, and bump stops.

• Typical signs a 2017 Astra needs front strut-mounts:
  • Clunk or knock from the top of the strut over speed humps or potholes
  • Notchy or springy feel when turning the steering at parking speeds
  • Uneven or accelerated front tyre wear and vague tracking on the motorway
  • Visible cracking or separation in the mount rubber under the bonnet

Left alone, a tired mount can shorten strut life and spoil steering precision. Fresh strut-mounts bring the Astra’s ride and handling back to how it should feel from the factory.

FAQs — 2017 Holden Astra strut-mounts

Does the 2017 Holden Astra have rear strut-mounts?
The 2017 Astra (BK) typically runs a separate rear spring and shock, not a rear MacPherson strut. That means there are rear upper shock mounts, but not rear strut-mounts in the strict sense. Front strut-mounts apply to the front axle only.

What are the common symptoms of worn front strut-mounts on a 2017 Astra?
Owners often report a dull clunk over bumps, a creak or notch when turning the wheel at low speed, and steering that won’t settle straight ahead. Uneven front tyre wear can also show up. A quick visual under the bonnet may reveal cracked rubber or a mount sitting off-centre.

Should strut-mounts be replaced with the struts?
It’s smart to do them together. The spring must be compressed to change either part, and fitting fresh mounts with new struts restores steering smoothness and reduces the chance of returning soon for a noisy or binding top bearing. Follow up with a wheel alignment.