Citroen C5 Aircross Engine Mount: Specs, Fitment & Common Faults

On the C5 Aircross, two genuinely free tests confirm a worn mount: watch the engine surge when switching off the ignition, plus a specific gear-change clunk pattern.

Illustration for editorial purposes

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Citroen C5 Aircross Engine Mount: OEM Part Number

Main engine mount	OEM part, specific to engine — confirm via VIN
Transmission mount & rear torque strut	Genuinely separate part numbers to the main engine mount — sold individually, and worth inspecting together if chasing a vibration or clunk

Accuracy note: genuinely worth knowing: a worn C5 Aircross engine mount often shows up as a clunk on gear changes or noticeable vibration at idle rather than an obvious failure — worth diagnosing which specific mount is at fault (a pry-bar check with the engine running is a common technique) before buying a full replacement set unnecessarily.

Two Genuinely Useful, Free Tests to Confirm a Worn Mount — Citroen C5 Aircross Engine Mount

A genuinely simple, visual test worth trying before assuming anything else: switch off the ignition and watch the engine bay closely — on a car with a worn lower or rear engine mount, you can often physically see the engine surge or lurch forward as it comes to rest, rather than settling smoothly. This visual confirmation, combined with a distinctive clunk specifically when pulling away in first gear and changing into second, is a genuinely reliable pattern pointing toward this specific mount rather than other suspension or drivetrain components.

A genuinely useful distinguishing detail: a worn lower/rear mount typically produces the clunk specifically during the transition of pulling away and changing gear, or under acceleration and deceleration while in gear — but stays quiet if you simply rev the engine while sitting in neutral. If your clunk only appears during that specific gear-change moment and not while revving stationary in neutral, this pattern points toward the mount specifically rather than a more generic engine or suspension noise.

Genuinely good news on cost: this specific mount has been quoted at around £30 for the part alone, and is a straightforward job — with the car correctly jacked and supported on axle stands, replacement typically takes around ten minutes once you can access the two mounting bolts underneath the car.

Citroen C5 Aircross Engine Mount reference plate

Citroen C5 Aircross Engine Mount: What It Does

Engine mounts secure the engine and transmission to the chassis while absorbing vibration and movement, preventing that vibration from transferring directly into the cabin. Most versions of the C5 Aircross use several mounts working together — typically at least one on each side of the engine plus a torque mount — and a single failed mount can throw off the whole assembly's balance.

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Citroen C5 Aircross Engine Mount: Symptoms, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Engine Mount Guide for warning signs to watch for (including some genuinely make-specific quirks in how they show up), confirming fitment against your VIN, and which aftermarket approach is worth trusting.

More Citroen Engine Mount

The same part, covered across other Citroen models.