Fiat 500 Tail Lights: Specs, Fitment & Common Faults

A genuinely useful, official-sourced explanation: tail light condensation, documented even on this electric model, typically appears after rapid cooling from rain or a car wash and should clear on its own.

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

Find Fiat 500 Tail Lights Here!

Opens live listings in a new tab.

A Genuinely Useful, Official-Sourced Explanation Worth Knowing

This is genuinely worth knowing if you're seeing condensation in a tail light on this electric model: light housings generally aren't fully sealed by design, including on this car — they have small vents allowing air to expand and contract as the lamp heats and cools, which draws in outside air and can cause condensation when temperatures drop. This has been documented as occurring even on this specific electric model, described by one owner as harmless despite being visually annoying. Genuine condensation from this normal process typically appears after the lamp is rapidly cooled by rain or a car wash, or after a warm, humid day is followed by a cool, clear night, and should clear on its own as conditions change.

A genuinely important distinction worth knowing if condensation doesn't clear or keeps recurring: if water genuinely persists rather than clearing within a day or two, or if you notice actual standing water rather than light misting, this points toward a genuine seal or gasket fault rather than the normal, temporary condensation process — worth having this properly inspected rather than assuming it will always resolve itself.

It's also worth knowing that unaddressed water ingress can, in documented cases on related Fiat models, progress beyond simple dampness to affect nearby electrics and wiring — worth having any persistent water ingress investigated and dried out thoroughly and promptly rather than leaving it, particularly given this car's greater reliance on electronic systems throughout.

Fiat 500 Tail Lights: More Wiring Behind There Than Most People Assume

The Fiat 500's tail light unit combines several jobs in one housing — brake, indicator, reversing and rear fog light — so a single fault can knock out more than one function at once, and "the tail light's not working" isn't really one specific problem.

Before you buy: tail light design and bulb type vary by trim and facelift status. Always confirm against your VIN before ordering.

Fiat 500 Tail Lights: Watch: Replacing It

🎬 Watch: Fiat 500 500e Tail light bulb replacement removal and install

Watch on YouTube ↗

This video is of an earlier generation of the same model; the job is similar but the light fittings and clips can differ slightly.

OEM Part Number: confirm via VIN — tail light (aftermarket) Van Wezel 1648921 / Diederichs 3406091

Accuracy note: Covers the Fiat 500 (500e 2020- (if absent use 500 2007-)) as listed in the UK aftermarket catalogues. Tail lights are handed (left and right are different parts) and the right one depends on whether your car has bulb or LED units, whether the cluster comes with its bulb holder, the body style and the facelift date. The references below are UK aftermarket catalogue listings for this generation, labelled by brand with the fitment details the catalogue gives, and shown for the left-hand light with its right-hand pair where the catalogue names one. Carmakers rarely publish the genuine number against these, so order a genuine light against your VIN if you want a guaranteed match; if the unit on your car has a separate inner light on the tailgate, that is sold as its own part.

Tail lights (aftermarket)	Van Wezel 1648921 (left, LED, with bulb holder, right-hand pair 1648922); Diederichs 3406091 (left, LED, from 2020); Alkar 2101353 (left, without bulb holder); Alkar 2203250 (left, LED, without bulb holder)
Genuine (OE) numbers quoted	None quoted in the catalogue listings — the genuine light varies by trim, bulb or LED type and facelift date, so order it against your VIN
Fitment notes	Left and right are separate parts; check LED or bulb type, whether the bulb holder is included, body style and facelift date before ordering.

The electric 500's LED tail lights are a genuinely different design to the older petrol 500's, despite similar overall styling — don't assume any interchangeability between the two unrelated cars.

Fiat 500 Tail Lights: What It Does

Beyond basic rear visibility, tail light units on the 500 typically integrate brake lights, indicators, reversing lights and rear fog lights into a single housing. Higher trims may use LED units with a distinct light signature, which are not interchangeable with standard halogen units even if the physical mounting looks similar.

Fitment & Compatibility

Fiat 500 Tail Lights: Generations & Tail Light Type

Standard trims	Halogen bulb-based units as standard
Higher trims, later model years	LED tail lights become available further up the range, genuinely a different assembly and connector from the halogen units on lower trims

Tail light design changed between generations of the 500, and facelifted versions within the same generation often use a revised light signature that isn't interchangeable with pre-facelift units. Always confirm the exact part for your specific model year before ordering. Whether you're sourcing a replacement tail 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.

Find Fiat 500 Tail Lights Here!

Opens live listings in a new tab.

Fiat 500 Tail Lights: Common Faults, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Tail Lights Guide for diagnosing which circuit has failed, how easy this job is to DIY, and aftermarket advice.

More Fiat Tail Lights

The same part, covered across other Fiat models.