Subaru Crosstrek Cabin Air Filter: Intervals, Fitment & Warning Signs

On the Crosstrek, a moldy smell tied specifically to the AC compressor engaging, despite a clean filter, genuinely confirms the evaporator as the source on related models.

Illustration for editorial purposes

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OEM Part Number: confirm via VIN — cabin air filter (aftermarket) Mann CU22004 / Mahle LA461

Accuracy note: Covers the Subaru Crosstrek (XV 2012-2017) as listed in the UK aftermarket catalogues. A cabin filter is a cheap part, but it is bought by number, and the number depends on whether your car was built with a standard particulate filter or an activated-carbon one, as well as on trim and build date. The references below are aftermarket catalogue listings for this generation, grouped by brand; the carmaker's own number is not quoted in those listings, so check the genuine filter against your VIN if you want a guaranteed match. Carbon versions carry their own numbers and are listed separately.

Cabin filter, standard (aftermarket)	Mann CU22004, Mahle LA461, Bosch 1987432262, Febi 184064
Activated-carbon version (aftermarket)	No carbon version listed separately for this generation
Genuine (OE) number	Not quoted in the catalogue listings — the fitted filter varies by trim and build date, so order the genuine one against your VIN
Fitment notes	Standard and carbon filters have different numbers, and the right size depends on trim and build date. Check which type your car was built with before ordering.

Subaru Crosstrek Cabin Air Filter: Easy to Forget, Easy to Fix

Skipping this one on a Subaru Crosstrek won't cost you performance or reliability, only air quality inside the cabin — which is why it's routinely the most overdue item on any used car's maintenance history.

Before you buy: filter size and whether your car uses a standard or activated-carbon filter varies by trim. Always confirm against your VIN before ordering.

Subaru Crosstrek Cabin Air Filter: What It Does

Two filters get mixed up constantly on the Subaru Crosstrek: this one cleans air for the cabin ventilation system, catching dust, pollen and (on activated-carbon versions) some airborne pollutants, while the separate engine air filter deals purely with combustion air. They don't share a part number or a purpose.

Subaru Crosstrek Cabin Air Filter: Watch: Replacing It

🎬 Watch: Subaru XV Crosstrek cabin filter replacement 2013 - 2016

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Subaru Crosstrek Cabin Air Filter reference plate

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A Genuinely Distinctive, Honest Real Case Worth Knowing — Subaru Crosstrek Cabin Air Filter

If a moldy smell only appears specifically when the air conditioning compressor is engaged, this is genuinely worth knowing: documented cases on related Subaru models describe exactly this pattern even with a genuinely clean, odourless filter, confirming the smell comes from the evaporator itself rather than the filter, since it stays damp during AC use even though it drains through a condensate tube.

A genuinely specific, real diagnostic technique worth trying: with the filter removed and the fan running, hold your hand over the filter housing — you should feel a clear, definite downward pull, confirming air is meant to flow down through the filter into the fan below.

It's also genuinely worth knowing a significant cost consequence of leaving a clogged filter unaddressed: a restricted filter forces the blower motor to work harder and can cause it to burn out prematurely, a considerably more expensive repair than the filter itself.

Subaru Crosstrek Cabin Air Filter: Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Cabin Air Filter Guide for signs it needs changing, confirming fitment against your VIN, and choosing standard, carbon, or HEPA media.

More Subaru Cabin Air Filter

The same part, covered across other Subaru models.