Vauxhall Insignia Fog Lights: Specs, Fitment & Common Faults

On the Insignia, the rear fog only works under specific conditions many owners don't realise — worth checking before assuming a fault.

Illustration for editorial purposes

OEM Part Numbers

Accuracy note: we weren't able to verify a confident Vauxhall Insignia fog lights part number at the time of writing. Please confirm the correct part via a Vauxhall dealer or parts specialist using your VIN.

Before Assuming a Fault: Check the Activation Conditions First

A genuinely common source of "my rear fog light doesn't work" confusion is worth ruling out first: on many Vauxhalls, the rear fog light will only illuminate when the engine is running, the headlights are switched to dipped beam (not just sidelights), and the fog switch is then pressed — simply having sidelights on and pressing the switch isn't enough, even though it might seem like it should be. If your rear fog genuinely isn't working, confirm you're testing it with all three conditions met before assuming a fault exists at all.

A genuine, documented fix worth trying if fog lights (or other electrical functions) are behaving oddly: cleaning the UEC (the under-bonnet fuse and relay centre) is a well-documented remedy across Vauxhall owner forums for a range of electrical gremlins, including fog lights not responding correctly — corrosion or a poor connection inside this unit can affect circuits that don't seem obviously related to it.

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.

Vauxhall Insignia Fog Lights reference plate

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 Insignia 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

Generations & Fog Light Type

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

Not every trim level of the Insignia 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 Vauxhall Insignia 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 Vauxhall Fog Lights

The same part, covered across other Vauxhall models.

Vauxhall Insignia Fog Lights: Specs, Fitment & Common Faults

OEM Part Numbers

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