Lexus NX Cabin Air Filter: Intervals, Fitment & Warning Signs

A genuinely useful piece of context worth knowing about preventing musty smells: switching to fresh air mode a few minutes before parking helps dry out condensation on related models.

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OEM Part Number: confirm via VIN — cabin air filter (aftermarket) Bosch 1987432190 / Valeo 715620

Accuracy note: Covers the Lexus NX (2014-2021) 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)	Bosch 1987432190, Valeo 715620, Filtron K1210, Purflux AH256
Activated-carbon version (aftermarket)	Bosch 0 986 628 623, Filtron K 1210A, Purflux AHC256
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.

Lexus NX Cabin Air Filter: Easy to Forget, Easy to Fix

This is one of the few parts on the Lexus NX that has zero effect on how the car actually drives — its whole job is air quality inside the cabin, which is exactly why it's so easy to let slide for years.

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.

Lexus NX Cabin Air Filter: What It Does

Air entering the Lexus NX's ventilation system passes through the cabin filter first, which traps dust and pollen, and on activated-carbon versions, some airborne odours too. It's entirely separate from the engine air filter — a different part doing a different job for the combustion process, not the cabin.

Lexus NX Cabin Air Filter: Watch: Replacing It

🎬 Watch: Lexus NX 300 (2014-2021): Cabin Air Filter Replacement

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Lexus NX Cabin Air Filter reference plate

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A Genuinely Useful Piece of Context Worth Knowing About Preventing Musty Smells — Lexus NX Cabin Air Filter

If you're trying to prevent musty smells developing, this is genuinely worth trying: setting the airflow to external or fresh air mode for a few minutes before switching the car off, rather than only doing this after parking, helps dry out condensation trapped in the vents on related Lexus models.

A genuinely honest clarification worth knowing: cleaning the evaporator itself, rather than simply replacing the cabin filter, isn't a simple task, since in most cases the entire dashboard has to be removed to access it.

It's also genuinely worth knowing that a smell isn't always filter or mould-related at all: pets, or even wildlife getting into the car if it's not parked in a garage, can introduce an odour that's easily mistaken for a dirty filter or evaporator issue.

Lexus NX 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 Lexus Cabin Air Filter

The same part, covered across other Lexus models.