Audi Q5 Cabin Air Filter: Intervals, Fitment & Warning Signs

On the Q5, most Audis genuinely have the filter behind the glovebox, but a few models place it under the windscreen cowl instead.

Illustration for editorial purposes

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OEM Part Number: 8K0819439

Accuracy note: this part is genuinely consistent across engine and trim variants, since it's part of the HVAC system rather than the drivetrain.

Cabin air filter, B8-era generation, standard filter	Audi OEM: 8K0819439 (also cross-referenced as 8K0819439C) — shared with A4, A5, allroad, RS5, S4, S5, SQ5
Cabin air filter, B8-era generation, activated carbon option	A genuine charcoal-lined equivalent exists on the same B8 platform for buyers wanting odour/gas filtration on top of standard particulate protection — confirm which type your car currently has fitted before choosing a replacement

Audi Q5 Cabin Air Filter: Easy to Forget, Easy to Fix

There's no performance downside to a neglected Audi Q5 cabin filter, which is precisely the problem: nothing about how the car drives will tell you it needs changing, so it often gets forgotten until a musty smell or weak airflow forces the issue.

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.

Audi Q5 Cabin Air Filter: What It Does

Don't confuse this with the Audi Q5's engine air filter — they're unrelated parts. The cabin filter's job is cleaning air before it reaches the ventilation system, catching dust and pollen, with activated-carbon versions also filtering some airborne odours.

Audi Q5 Cabin Air Filter reference plate

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A Genuinely Important Clarification Worth Confirming Before Buying a Filter — Audi Q5 Cabin Air Filter

This is genuinely worth confirming before ordering a replacement: most Audis use a front-access method with the filter positioned behind the glovebox, but a small number of models instead place the filter under the cowl at the base of the windscreen — worth confirming which specific location applies to your car before buying, since the part and fitting procedure are completely different between the two.

A genuinely useful, preventative finding worth knowing: consistently using the recirculation setting rather than fresh air mode helps keep the evaporator dry, which can prevent musty smells and mould developing in the first place. It's also genuinely worth knowing a useful technique for an existing smell: setting the heater to high with recirculation on and letting the car idle for around fifteen minutes can help bake an existing smell out of the evaporator.

It's also genuinely worth knowing to check the plenum area below the windscreen for a build-up of leaves and debris, since this is a regularly documented source of water finding its way into the cabin.

Audi Q5 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 Audi Cabin Air Filter

The same part, covered across other Audi models.