Subaru Forester Fog Lights: Specs, Fitment & Common Faults
A genuinely specific, real technical finding: a shared ground point connects the right-hand fog light and the cruise control actuator on this model, explaining why these two seemingly unrelated systems can fail together.
Illustration for editorial purposes
OEM Part Numbers
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.
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 Forester 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 Forester 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 Subaru Forester 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
What to Look For
- One side not working — usually a blown bulb, the most common and easiest fault to fix.
- Neither side working — more likely a blown fuse or a faulty switch than two bulbs failing simultaneously.
- Condensation inside the lens — points to a failed seal, worth addressing before it affects the bulb or wiring.
- Cracked housing from front-end impact — common given their low mounting position, usually a straightforward like-for-like replacement.
DIY Replacement Difficulty
Bulb replacement is usually an easy DIY job, though access varies — some versions require reaching up from underneath via the wheel arch liner, others come apart from the front. Full housing replacement is similarly straightforward on most versions. Expect 15–30 minutes for a bulb swap, longer if the housing itself needs replacing.
A Genuinely Specific, Real Technical Finding Worth Knowing
If your fog lights and cruise control have stopped working at the same time, this is genuinely worth knowing before assuming two entirely separate faults: there's a shared ground point specifically connecting the right-hand front fog light and the cruise control actuator on this model. Rather than a coincidence, this shared ground failing is a genuine, documented explanation for why these two seemingly unrelated systems can fail together — worth checking this specific ground connection, typically located in the engine compartment near the front of the frame rails, before assuming two unrelated problems.
It's also genuinely worth knowing that fog lights are designed to work specifically with low beams switched on, not with high beams or daytime running lights alone, unless the car has had aftermarket modifications made.
OEM vs. Aftermarket
Reputable aftermarket fog light units and bulbs are a reliable, cost-effective alternative to OEM parts for the vast majority of cases, since this is a relatively simple lighting component without the complexity of adaptive or LED headlight systems.
More Subaru Fog Lights Guides
The same part, covered across other Subaru models.