The exact oil filter part number depends on the engine in your 2009 Audi A4; there isn’t a single universal number. To be sure, identify your engine code (via VIN or the engine stamping) and then check Audi’s official parts catalog or ask a dealer for the precise cartridge filter part number.
Engine options and why the part number varies
For 2009, the A4 lineup included several engines across markets: a 2.0-liter turbocharged petrol (TFSI), a 3.2-liter V6 (FSI), and in some regions a 2.0-liter diesel (TDI). Each engine family uses its own oil filter cartridge specification, so the correct part number is tied to the exact engine variant rather than the model year alone.
How to identify the correct oil filter for your car
Use these steps to determine the right part number for your oil filter:
- Find the engine code on the engine block or in the vehicle’s service documentation. The engine code identifies the exact engine family (for example, 2.0T FSI, 3.2 FSI, or 2.0 TDI in some markets).
- Use the Vehicle Identification Number (VIN) to look up the engine code in Audi’s official parts catalogs, or in a trusted retailer’s lookup tool.
- Consult the Audi ETKA/EPC parts database or a dealer parts counter to pull the precise oil filter cartridge part number that matches your engine code and the filter kit you need (some kits include the cartridge plus an O-ring).
- Match the old filter physically if you’re replacing an existing unit; bring your current filter to the parts counter to help verification if you’re unsure of the code.
This approach ensures you order the exact cartridge and any accompanying O-rings or seals that your engine requires.
Where to source and how to confirm compatibility
Choose OEM or high-quality aftermarket filters from brands that supply filter cartridges for Audi engines. Use a VIN-based lookup to confirm compatibility, and double-check the part number with the retailer before purchase.
- OEM options: Audi Genuine Parts and authorized dealers.
- Aftermarket but reputable brands: Bosch, Mann+Hummel, Mahle, and other established suppliers often offer OEM-equivalent oil filter cartridges.
- Validation steps: verify the part number in the retailer’s catalog, cross-check with ETKA, and confirm that the kit includes the cartridge and any required O-rings.
By verifying engine code and using trusted catalogs, you minimize the risk of ordering the wrong filter.
Summary
For a 2009 Audi A4, the oil filter part number is not universal; it depends on the engine code. Start by identifying your engine variant via VIN or engine stamping, then consult Audi’s ETKA or an authorized dealer to obtain the exact cartridge part number and any accompanying seals. When in doubt, rely on OEM parts or well-known aftermarket brands and verify compatibility with VIN-based lookups.