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Number 31 marks the part’s position in this exploded view (Audi A5 Limousine (2024-2025)).
Other diagrams in the gallery may use a different number for the same part.
Product overview
Genuine OEM Audi Cap for Expansion Tank, part number 8B3121321. Fits Audi A5 Avant (2024-2025), Audi A5 Limousine (2024-2025), Audi Q6 e-tron (2023-2025), Audi Q8 e-tron (2018-2025). Shown as position 31 in the engine diagram 8WK12114.
Catalogue entry: cap for expansion tank.
Technical details
- Category
- Engine Cooling
- Diagram sheet
- Audi 8wk121090, position 31
- ETKA group
- 1 / 21 (121)
- Manufacturer
- Audi
- Product Type
- Genuine new auto parts
Specifications
As recorded in the manufacturer’s parts catalogue for this part number.
Equipment codes
- 0K4
PR codes identify the factory option a part belongs to; your vehicle’s are listed on the data sticker in the boot well or service booklet.
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Parts diagram & fitment
5 vehiclesCap For Expansion Tank — locate 8B3121321 Audi Cap for Expansion Tank in the official exploded view and explore the surrounding assembly.
Parts in this assembly14
Vehicle fitment table5
Europe (4)
| Vehicle | Years | Pos. | Qty |
|---|---|---|---|
| Audi A5 Limo 2.0 | 2024- | 12 | 1 |
| Audi A5 Avant 2.0 | 2024- | 12 | 1 |
| Audi Q6 e-tron | 2023- | 12 | |
| Audi Q8 e-tron | 2018-2020 | 11 |
Other markets (1)
| Vehicle | Years | Pos. | Qty |
|---|---|---|---|
| Audi e-tron | 2020-2023 | 12 |
Diagrams & fitment data powered by oemdiagrams.com
8B3121321 Audi Cap for Expansion Tank is fitted on: Audi A5 Limo 2.0 2024-; Audi A5 Avant 2.0 2024-; Audi Q6 e-tron 2023-; Audi Q8 e-tron 2018-2020; Audi e-tron 2020-2023.
