2025 Audi A4 Quattro engine air filter: Sizes & Replacement Parts
I4 turbo: WIX WA10866 / Purolator A21778; 2.0L I4: Bosch 5674WS. Pick the engine tab that matches your car before ordering.
Looking for the cabin / A/C air filter instead? 2025 Audi A4 Quattro cabin air filter →
Choose your engine size
The 2025 Audi A4 Quattro uses different engine air filter part numbers by engine. Select your engine, then use the part numbers in that panel.
Not sure which engine you have?
Check the sticker on the driver's door jamb (open the door and look at the door frame) — it lists the engine displacement. You can also look at the rear of the car: a V6 badge means the larger engine; no engine badge typically indicates the base 4-cylinder (I4). When in doubt, check your owner's manual or the underhood emissions sticker.
I4 turbo
Main catalog answer: WIX WA10866 / Purolator A21778
- Filter type
- Basic
- Sources
- WIX Filters, Purolator Now
The Direct Fit part is the primary catalog listing for this engine row. Purolator TA21778 is also listed by checked catalogs for this same engine row.
Links search this exact part number. Confirm 2025 Audi A4 Quattro and the I4 turbo engine in the seller's vehicle selector before checkout.
2.0L I4
Main catalog answer: Bosch 5674WS
- Filter type
- Basic
- Sources
- Bosch Auto Parts
The Direct Fit part is the primary catalog listing for this engine row. No additional part numbers were found for this engine row.
Links search this exact part number. Confirm 2025 Audi A4 Quattro and the 2.0L I4 engine in the seller's vehicle selector before checkout.
Fitment scope and limits
The 2025 Audi A4 Quattro can use different engine air filters by engine size. Use the row for I4 turbo, 2.0L I4, then confirm that same engine in the seller's vehicle selector.
The checked catalogs did not provide source-backed replacement interval for this exact record, so this page does not publish those fields.
Catalogs can list more than one part number for the same vehicle. Use this page to compare the listed numbers, then use the seller's vehicle selector before ordering.
Source notes
Listed in 3 catalogs. These part numbers come from filter manufacturer catalogs. Use the source trail below to see which catalog supported this page.
| Source | Role | Supports | Checked |
|---|---|---|---|
| Bosch Auto Parts | Primary | Filter for 2.0L I4 | 2026-06-26 |
| Purolator Now | Corroboration | Filter for I4 turbo | 2026-06-26 |
| WIX Filters | Corroboration | Filter for I4 turbo | 2026-06-26 |
Checked catalogs: Bosch Auto Parts, Purolator Now, WIX Filters. Replacement interval is not listed unless a source provides it for this exact vehicle and engine row.
2025 Audi A4 Quattro maintenance checklist
One part checked. Look up the rest while you're here.
Questions this page answers
What engine air filter fits the 2025 Audi A4 Quattro I4 turbo?
Checked catalogs list WIX WA10866, Purolator A21778, Purolator TA21778 for the 2025 Audi A4 Quattro I4 turbo. The primary listing is WIX WA10866 / Purolator A21778, with Purolator TA21778 also listed. Confirm this part number in the seller's vehicle selector before ordering.
What engine air filter fits the 2025 Audi A4 Quattro 2.0L I4?
Checked catalogs list Bosch 5674WS for the 2025 Audi A4 Quattro 2.0L I4. The primary listing is Bosch 5674WS. Confirm this part number in the seller's vehicle selector before ordering.
How do I know which engine my 2025 Audi A4 Quattro has?
Check the sticker on the driver's door jamb — it lists the engine displacement. A "V6" badge on the rear of the car means the larger engine. No engine badge typically means the base 4-cylinder (I4). When in doubt, check your owner's manual or the underhood emissions sticker.
Is the 2025 Audi A4 Quattro engine air filter the same across all engine options?
The 2025 Audi A4 Quattro can use different engine air filters by engine size. Use the row for I4 turbo, 2.0L I4, then confirm that same engine in the seller's vehicle selector.
Does this page confirm a replacement interval?
The checked catalogs did not provide source-backed replacement interval for this exact record, so this page does not publish those fields.
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