Engine Air Filter – 8W0 133 843 D
Engine Air Filter for Audi A4 (B9) / A5 / Q5, OE number 8W0 133 843 D. Main group 133 sub-group 843 identifies this as an engine intake filter. Revision index D. Replace at the interval in your service schedule — a restricted intake filter costs measurable power and fuel economy.
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Technical specifications
| Part Number | 8W0 133 843 D |
| SKU | AUD-8W0133843D |
| Brand | |
| Category | Air Filters |
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Customer reviews
Verified feedback from Audi owners and independent workshops.
4.2
6 reviews
Nadia Bianchi
August 4, 2026
Good pleat count
My A4 B8.5 needed this doing at 49k miles. Two minutes behind the glovebox once I had the tabs released. The pleat count is visibly higher than the supermarket filter I had been using. Result is throttle response feels crisper than it did on the clogged original.
Malik Zimmer
April 22, 2026
Exactly what the service needed
Ordered this for my RS4 B7 after the original gave up at 151k. I changed it with the oil at the same service interval. Dimensions matched the outgoing filter to the millimetre. Result is oil pressure comes up as quickly on a cold start as it always has.
Ines Zimmer
August 23, 2025
No leaks, no fuss
Went on my A4 B7 2.0 TFSI at 108k miles. Dimensions matched the outgoing filter to the millimetre. Two minutes behind the glovebox once I had the tabs released. Result is the musty smell from the vents has completely gone. Happy to recommend it.
Sofia Haugen
August 21, 2025
Correct fit, sealed properly
Went on my S3 8V 3.0 TFSI V6 at 122k miles. The pleat count is visibly higher than the supermarket filter I had been using. It dropped straight into the housing and the cap torqued to spec first go. Result is the musty smell from the vents has completely gone. Happy to recommend it.
Patrick Haugen
July 5, 2025
Right filter, tight in the housing
My A6 C8 needed this doing at 119k miles. I changed it with the oil at the same service interval. The outer diameter was a couple of millimetres off and it would not sit square in the housing. That said, shifts are smoother now the transmission has clean fluid and a fresh filter. Fine for the money, with that one caveat.
Martin Zimmer
February 27, 2025
Right filter every time
Second one of these I have bought, this time for the Q8 4M. The rubber seal is supple and sat in its groove without coaxing. It dropped straight into the housing and the cap torqued to spec first go. Result is the musty smell from the vents has completely gone. Exactly what I needed.