Ford Mondeo Fog Lights: Specs, Fitment & Common Faults
Whether the Mondeo's dashboard fog light icon illuminates when pressed tells you exactly where the real fault sits.
Illustration for editorial purposes
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OEM Part Number: 4550597 (as quoted in catalogue listings — confirm via VIN) — aftermarket Valeo 043352 / TYC 19-6147-01-9
| Fog light, passenger side (LH / nearside) — aftermarket | Valeo 043352 (H11, Fogstar, bulb included, fits either side); Valeo 088358 (H11, 90 mm round, bulb included, fits either side); Diederichs 3457088 (H11, with bulb, fits either side); Diederichs 1419089 (H8, with bulb, for dynamic bending light); TYC 19-6148-01-9 (H8, cornering light, Vignale and ST-Line); Van Wezel 1947995 (H8, dynamic bending light) |
|---|---|
| Fog light, driver's side (RH / offside) — aftermarket | TYC 19-6147-01-9 (H8, cornering light, Vignale and ST-Line); Diederichs 1419088 (H8, with bulb, for dynamic bending light); Van Wezel 1947996 (H8, dynamic bending light); Fast FT85876 (H8, no bulb); Ford 4550597 (H11, bulb holder included, genuine Ford part, fits either side) |
| Bulb types | H11; H8 (PGJ19-1); H11 socket PGJ19-2 |
| Genuine (OE) numbers quoted | Ford 4550597 (front fog lamp, either side, marked as an original-equipment part) |
| Fitment notes | Titanium and Titanium X cars use plain H11 or H8 lamps while Vignale and ST-Line cars use the cornering-light TYC versions; the lamps sit in the lower bumper. |
A Genuine Diagnostic Shortcut Worth Knowing First — Ford Mondeo Fog Lights
A genuinely useful diagnostic starting point on the Mondeo: pressing the fog light switch and watching whether the dashboard indicator icon illuminates tells you a lot about where the fault actually sits. If the icon lights up as expected but the physical lights themselves stay off, this points to a wiring, connector, or bulb problem downstream of the switch — the switch and its electronics are working correctly, so there's no point chasing a switch replacement. If the icon doesn't illuminate at all, the problem is more likely upstream, at the switch itself or the fuse feeding it.
On the Mondeo, two other genuinely common, specific causes worth checking: a wiring harness connector near the fog light that's come loose or was never reconnected properly after bumper or bodywork repair (a surprisingly common cause after any front-end repair work), and, less commonly but still worth ruling out, animal damage to the wiring loom on a car that's spent time parked outside — rodents chewing through wiring insulation is a genuine, if less obvious, cause of exactly this kind of intermittent or total fog light failure.
Ford Mondeo Fog Lights: Rarely Used, Easy to Forget About Until Needed
Most Ford Mondeo owners barely use their fog lights outside a handful of days a year, so a fault can sit unnoticed for a long stretch — until a properly foggy morning exposes it at exactly the wrong moment.
Ford Mondeo Fog Lights: Watch: Replacing It
Mk5 front fog and headlamp bulb change.
Ford Mondeo 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 Mondeo 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
Ford Mondeo Fog Lights: 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 Mondeo 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 Ford Mondeo 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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Ford Mondeo 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 Ford Fog Lights
The same part, covered across other Ford models.