Mazda CX-5 Tail Lights: Specs, Fitment & Common Faults

Confirmed: a genuine Mazda technical bulletin explains light condensation as normal, with newer clear-lens models simply making it more visible — plus how to tell a gasket leak from a cracked seam.

Illustration for editorial purposes

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OEM Part Number: confirm via VIN — tail light (aftermarket) Van Wezel 2780925 / Diederichs 5630191

Accuracy note: Covers the Mazda CX-5 (KE 2012-2017) 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 2780923 (left, with bulb holder, to 2015, inner section, right-hand pair 2780924); Van Wezel 2780925 (left, LED, with bulb holder, to 2015, outer section, right-hand pair 2780926); Diederichs 5630093 (left, with bulb holder, inner section); Diederichs 5630191 (left, LED, with bulb holder, from 2015, outer section, right-hand pair 5630190)
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.

Confirmed: A Genuine Technical Bulletin Worth Knowing About — Mazda CX-5 Tail Lights

This is genuinely worth knowing if you're seeing light condensation in a tail or headlight: Mazda has a specific technical service bulletin (referenced 09-003-19-3555) explaining that condensation or fogging inside combination light units is a normal phenomenon, caused by a temperature difference between the inside and outside of the housing, and doesn't affect the light's actual performance. Genuinely worth knowing: this bulletin specifically notes that newer models fitted with a clear lens can make this normal condensation considerably more visible than on older models with a coloured lens — meaning your car isn't necessarily developing a worse problem than an older model, it's just easier to see now.

A genuinely detailed, real diagnostic distinction worth knowing if condensation seems excessive: a gasket-based leak is more common than a cracked seam, and tends to show water entering specifically around the gasketed mounting points. A cracked seam, by contrast, typically shows minor condensation around the crack first, building up gradually over time, and — since the clear lens is ultrasonically welded to the housing and should show no haze — a hazy or whitish spot specifically at the seam is worth looking for closely as a sign of this specific fault. Knowing which of these two you're actually dealing with helps determine whether a reseal or a full unit replacement is genuinely needed.

It's also genuinely worth knowing that all four light units showing water simultaneously points away from four separate light failures and toward something else entirely — most likely a failed rear window seal or boot weatherstripping allowing water into the boot cavity generally, which then also affects the light units connected to that same space. If you're seeing water in multiple lights at once, it's worth having the boot and rear window seals checked before assuming every light unit itself has failed.

Mazda CX-5 Tail Lights: More Wiring Behind There Than Most People Assume

One housing, several jobs: on the Mazda CX-5, brake light, indicator, reversing light and rear fog light are typically all bundled into a single tail light unit, which is why one electrical fault can take out multiple functions together, and "faulty tail light" covers a lot of possible causes.

Mazda CX-5 Tail Lights: Watch: Replacing It

🎬 Watch: How to replace Broken Rear Tail Light on 12 - 16 KE model Mazda CX 5

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

Mazda CX-5 Tail Lights: What It Does

Beyond basic rear visibility, tail light units on the CX-5 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

Mazda CX-5 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 CX-5, 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 Mazda CX-5 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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Mazda CX-5 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 Mazda Tail Lights

The same part, covered across other Mazda models.