Fiat 500 Fog Lights: Specs, Fitment & Common Faults

A genuinely useful piece of context: on related Fiat models, a rear fog light configured as the wrong side in software has caused an identical, resolvable fault — worth knowing as a possibility alongside a practical relay diagnostic technique.

Generation covered: this guide is for the fully electric Fiat 500 (2020–present), with particular focus on 2020–2023 registered examples now old enough for parts to be a common search. This is an entirely different car from the previous petrol 500 (2007–2024), sharing no mechanical parts with it despite the similar styling — check your logbook or VIN if you're unsure which one you have.

Illustration for editorial purposes

A Genuinely Useful Piece of Context Worth Knowing About Fiat's Software Configuration

If a rear fog light won't work despite the bulb, wiring, and fuse all testing fine, this is genuinely worth knowing: on related Fiat models, a documented case found a rear fog light configured in the car's diagnostic software as the wrong side entirely, with switching this specific setting resolving the fault completely. It's worth being aware that a genuine software configuration mismatch, rather than a physical fault, is a real possibility worth having a specialist check via diagnostic equipment if everything else checks out physically, though the specific software architecture on this newer electric model may differ from the older petrol range where this was documented.

A genuinely useful, real diagnostic technique worth trying: directly firing the fog light relay using a simple 9V battery can help isolate where a fault genuinely lies — if the lights come on this way, the fault is between the relay and the bulb; if not, it lies before the relay, in the switch or its wiring.

It's also worth knowing that a persistent electrical fault affecting exterior lighting can sometimes be traced to a fault with the Body Control Module itself, rather than anything simpler like a blown bulb or fuse — worth having this checked by someone with proper diagnostic equipment if more straightforward checks haven't revealed the cause.

Rarely Used, Easy to Forget About Until Needed

Fog lights sit unused for most owners most of the year, which means a fault can go unnoticed for a long time — right up until a genuinely foggy morning makes the problem obvious at the worst possible moment.

Before you buy: fog light fitment and bulb type vary by trim — not every trim level includes them as standard. Always confirm against your VIN before ordering.

OEM Part Numbers

Accuracy note: we weren't able to verify a confident FA1-specific (European) fog light part number at the time of writing. Please confirm the correct part via a Fiat dealer or parts specialist using your VIN.

Not every 500e trim comes with front fog lights as standard — some use a styled blanking cover in the same location instead. Confirm your exact trim before assuming this part applies to your car.

What It Does

Front fog lights are angled and positioned to illuminate the road surface in low visibility conditions without creating the glare a standard headlight beam would in fog. Some higher trims of the 500 integrate fog lights into the same housing as cornering lights or daytime running lights, which affects both the part number and the complexity of any repair.

Fitment & Compatibility

Not every trim level of the 500 comes with fog lights fitted as standard, and the housing design often differs between trims that have them integrated with other lighting functions and those with a standalone unit. Always confirm your specific trim's fitment before ordering. Whether you're sourcing a replacement fog lights for your Fiat 500 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, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Fog Lights Guide for common faults to check for (including exactly what fails an MOT), how easy this job is to DIY, and aftermarket advice.

More Fiat Fog Lights

The same part, covered across other Fiat models.

Fiat 500 Fog Lights: Specs, Fitment & Common Faults

A Genuinely Useful Piece of Context Worth Knowing About Fiat's Software Configuration

OEM Part Numbers

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