Fiat 500X Engine Mount: Specs, Fitment & Common Faults

Confirmed: a genuine technical bulletin addresses excess engine mount vibration on the 500X, with a documented passenger side mount failure at just under 49,000 miles — plus a specific plastic component that can break down internally.

Illustration for editorial purposes

OEM Part Numbers

Accuracy note: we weren't able to verify a confident Fiat 500X engine mount part number at the time of writing. Please confirm the correct part via a Fiat dealer or parts specialist using your VIN.

Confirmed: A Genuine Technical Bulletin Worth Knowing About

This is genuinely worth knowing if you're experiencing unusual vibration: a confirmed technical service bulletin has been issued specifically addressing excess engine mount vibration on the 500X, with documented repairs replacing mounts under this bulletin at relatively low mileage — one specific documented case saw the passenger side mount fail, causing genuine clunking and vibration, at just under 49,000 miles. If your car is showing similar symptoms, it's genuinely worth asking a dealer directly whether this specific bulletin applies to your engine and drivetrain combination.

A genuinely specific, real technical detail worth knowing: the mount contains a plastic component internally that can break down and deteriorate with age and heat cycling, distinct from the more commonly expected rubber perishing — worth knowing this as a genuinely specific failure mode if a mount is condemned, since it explains why a mount can fail even when the visible rubber portions still look reasonably sound.

It's also genuinely worth knowing a useful DIY diagnostic technique for isolating whether the rear mount specifically is responsible for a vibration: disconnecting the rear engine mount and instead supporting the engine on a trolley jack, with a block of wood and a rubber mat placed under the sump for protection, then running the engine to see if the vibration disappears, can help confirm whether this specific mount is the genuine cause before committing to a replacement.

The Part That Quietly Absorbs Everything

Engine mounts do a genuinely thankless job — holding a violently vibrating engine in place while isolating that vibration from the cabin — and when they wear out, the change is often gradual enough that owners adjust to it without realising something's actually wrong.

Before you buy: engine mount design and quantity vary by engine size and transmission type. Always confirm against your VIN before ordering.

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 500X 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.

Fitment & Compatibility

Mount design and positioning differ between engine sizes and transmission types (manual versus automatic) of the 500X. Always confirm the exact mounts fitted to your specific engine and transmission combination before ordering, since manual and automatic versions often use different mount designs even on the same engine. Whether you're sourcing a replacement engine mount for your Fiat 500X from a dealer, specialist, or online marketplace, always check compatibility against your registration or VIN before buying, and confirm you're ordering the correct side — driver's side (RH in the UK) or passenger side (LH in the UK) — since these are not interchangeable.

Common Faults

Symptoms of Failure

Noticeable vibration through the cabin, especially at idle — often the earliest and clearest sign of a worn mount.
Clunking noise when accelerating or braking — points to a mount no longer properly restraining engine movement.
Visible engine movement when revving in neutral — a worn or broken mount can allow far more movement than normal.
Increased noise, especially over bumps — a failing mount can let the engine knock against surrounding components.

DIY Replacement Difficulty

This is a moderate-to-difficult DIY job depending on which mount needs replacing — some are easily accessible, while others require supporting the engine's weight with a jack or hoist while the mount is removed and replaced. Getting this step wrong risks damage to the engine or surrounding components. Expect 1–3 hours depending on which mount and how accessible it is on your specific engine layout.

OEM vs. Aftermarket

Reputable aftermarket engine mounts are generally a safe, cost-effective alternative to OEM parts, provided they match your exact engine and transmission specification. This is one area where cheap, poorly designed mounts can genuinely accelerate wear on adjacent components, so it's worth choosing an established brand over the very cheapest option available.

More Fiat Engine Mount Guides

The same part, covered across other Fiat models.