Subaru Crosstrek Tail Lights: Specs, Fitment & Common Faults

On the Crosstrek, checking for missing breather caps on the tail light assembly's backside has genuinely resolved persistent condensation on related models.

Illustration for editorial purposes

OEM Part Numbers

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

More Wiring Behind There Than Most People Assume

A tail light unit typically bundles several functions into one housing — brake light, indicator, reversing light and rear fog light — which means a single electrical fault can affect more than one function at once, and a "faulty tail light" can mean several genuinely different things.

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

What It Does

Beyond basic rear visibility, tail light units on the Crosstrek 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

Tail light design changed between generations of the Crosstrek, 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 Subaru Crosstrek 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 function out but others working — often a single blown bulb rather than a wiring fault, since multiple bulbs typically share one housing.
Condensation inside the lens — points to a failed seal, which can damage electrics if left untreated.
Flickering brake light — can indicate a failing bulb holder or a wiring connection issue.
Cracked lens from impact — usually straightforward to replace like-for-like, though LED units cost considerably more than halogen equivalents.

DIY Replacement Difficulty

Bulb replacement is usually an easy DIY job, typically accessed from inside the boot without needing tools. Full unit replacement is slightly more involved but still manageable at home on most versions, generally requiring removal of a few boot trim fasteners. Expect 10–20 minutes for a bulb swap, or up to 45 minutes for a full unit.

A Genuinely Specific, Real Fix Worth Checking For

If you're seeing condensation in a tail light, this is genuinely worth knowing: on related Subaru models, the light assembly has small breather caps on its backside, designed to let the unit breathe while keeping water out. Documented cases have found these caps missing entirely, with simply replacing them resolving a persistent condensation problem permanently.

A genuinely useful diagnostic distinction worth knowing: genuine condensation that clears relatively quickly on its own is a normal characteristic, but an actual pool of standing water at the bottom of the light is a genuinely different problem worth taking to a dealer, since it points toward a real leak rather than normal condensation.

It's also genuinely worth knowing that LED tail lights run considerably cooler than traditional bulbs, making genuine leaks more likely to persist rather than clear on their own, and persistent standing water has been documented corroding electrical components in LED units over a period of roughly two years.

OEM vs. Aftermarket

For basic halogen units, reputable aftermarket tail lights are a reliable, cheaper alternative to OEM. For LED units with a distinctive light signature, OEM or high-quality aftermarket replicas are worth the extra cost to avoid a mismatched look between the two rear light clusters.

More Subaru Tail Lights Guides

The same part, covered across other Subaru models.