BMW 3 Series Fog Lights: Specs, Fitment & Common Faults
A genuinely honest finding: a faulty fog light switch has been reliably fixed simply by cleaning the internal contacts and applying silicone grease, lasting for decades afterward — plus a useful technique for bypassing the relay to isolate the fault.
Illustration for editorial purposes
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Rarely Used, Easy to Forget About Until Needed
The BMW 3 Series's fog lights sit idle for the vast majority of owners most of the year, which is exactly why a fault can go undetected for months — surfacing only on the one properly foggy morning when it matters most.
BMW 3 Series Fog Lights: OEM Part Number
Not every G20 trim comes with fog lights — some use a styled blanking cover in the same bumper location instead, and M Sport bumpers use a different opening design to standard SE/Sport bumpers. Confirm your exact trim before assuming this part applies to your car.
BMW 3 Series Fog Lights: 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 3 Series 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.
BMW 3 Series Fog Lights: Generations, Derivatives & Fog Light Type
| Standard trims | Halogen (HB4/9006) bulb-based fog lights as standard |
|---|---|
| M Sport, factory option | Genuine BMW retrofit LED fog lights are available (confirmed part number 63 13 2 358 310) as a direct replacement for the halogen units — specifically intended for cars WITHOUT adaptive headlights, since adaptive-equipped cars use a different lighting strategy |
| M-Technic/M Sport bumper fitment note | Fog light lenses differ between fluted and clear designs depending on bumper spec — confirm which your car has before ordering a single replacement side, since the two aren't interchangeable |
Fitment & Compatibility
Not every trim level of the 3 Series 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 BMW 3 Series 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.
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A Genuinely Honest, Real Finding Worth Knowing — BMW 3 Series Fog Lights
If a front fog light switch has become unreliable, this is genuinely worth knowing: a faulty switch has been reliably fixed in documented cases simply by disassembling it, cleaning the internal contacts with proper switch cleaning fluid, and applying a light coating of silicone grease — described as a fix that can genuinely last for decades afterward, rather than just a temporary improvement, worth trying this before assuming a full replacement switch is needed.
It's also genuinely worth knowing that on some models, the front fog lights genuinely won't illuminate at all if the main beam headlights are switched on, even with the fog switch pressed — this is a deliberate design characteristic rather than a fault.
BMW 3 Series Fog Lights: 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 BMW Fog Lights
The same part, covered across other BMW models.