Denso 143-3837 Engine Air Filter

Denso Engine Air Filter for Audi

Denso FTF Air Filter 143-3837 is an engine air filter built for select Audi applications from 2017-2024. It is engineered to meet Denso quality standards and support clean airflow for the engine in daily driving and routine maintenance.

• Engine air filter for select Audi A4, A4 allroad, A4 Quattro, A5 Quattro, A5 Sportback, Q5, Q5 PHEV, and Q5 Sportback applications
• First Time Fit Air Filter line from Denso
• OE-focused replacement for factory-style fitment
• Cross-reference: Audi 8W0 133 843 C and Wix WA10866
• Part number: 143-3837

FTF Air Filter Line Details

Denso’s First Time Fit Air Filter line is built around OE-style fit and consistent filtration performance. As a global OEM supplier in engine filtration components, Denso applies manufacturing standards aimed at delivering dependable replacement parts for vehicles that require precise air intake filtration. This Denso 143-3837 air filter is a direct replacement choice for drivers maintaining Audi engine air filtration on scheduled service intervals.

Vehicle Fitment

• Fits 2021-2024 Audi A4 allroad, N/A
• Fits 2021-2024 Audi A4 Quattro, N/A
• Fits 2021-2024 Audi A5 Quattro, N/A; unit 06L.E [T2H]; unit 06N.A 888evo4 [T2A]; unit 06N.B 888evo4 [T2B]; Without alternative drive system [0K0]; unit 06L.D [T2G]
• Fits 2021-2024 Audi A5 Sportback, N/A; without alternative drive system [0K0]; unit 06L.D [T2G]; unit 06N.A 888evo4 [T2A]; unit 06N.B 888evo4 [T2B]; unit 06L.D [T2G]
• Fits 2021-2024 Audi Q5, N/A
• Fits 2021-2024 Audi Q5 PHEV, N/A
• Fits 2021-2024 Audi Q5 Sportback, N/A
• Fits 2017-2020 Audi A4 allroad, N/A
• Fits 2017-2020 Audi A4 Quattro, N/A
• Fits 2018-2020 Audi A5 Quattro, N/A
• Fits 2018-2020 Audi A5 Sportback, N/A
• Fits 2018-2020 Audi Q5, N/A
• Fits 2020 Audi Q5 PHEV, N/A
• Fits 2017-2018 Audi A4, N/A

Common Replacement Reasons

• Restricted airflow from a dirty or clogged engine air filter
• Dust and debris buildup in the intake system
• Routine maintenance replacement for Audi A4, A5, and Q5 models
• Service interval replacement for factory-style air filtration
• Restoring proper engine breathing after filter wear

Installation Notes

Verify the part number and vehicle application before installation. Confirm the engine code and any listed configuration notes for your Audi A4, A4 allroad, A4 Quattro, A5 Quattro, A5 Sportback, Q5, Q5 PHEV, or Q5 Sportback. Replace the filter according to the vehicle maintenance schedule and inspect the air box for debris before installing the new filter.

Quality Assurance

Denso states that First Time Fit Air Filters are manufactured to its quality standards and backed by quality assurance. The brand’s OEM background in engine filtration supports consistent replacement-part selection for Audi maintenance.