United States
Product overview
Genuine OEM Audi Expansion Tank Cap, part number 8E0121321. This cap seals the coolant expansion tank, maintaining the correct system pressure essential for efficient engine cooling. The cap is blue and weighs 0.125 kg. Using a genuine OEM expansion tank cap ensures precise pressure regulation, proper sealing, and resistance to high temperatures and corrosive coolants, preventing leaks and engine overheating.
Technical details
- Category
- Engine Cooling
- Country of origin
- Germany
- Customs (HS) code
- 87089997
- Manufacturer
- Audi
- Product Type
- Genuine new auto parts
- Shipping size (L × W × H)
- 13 × 9.5 × 7.5 cm
- Shipping weight
- 0.13 kg
Why buy from WW Spares?
- ✓ Genuine OEM inventory sourced directly from factory networks
- ✓ Fitment support from workshop-seasoned parts specialists
- ✓ Global logistics with customs-ready documentation
Need help confirming compatibility? Talk to a specialist
Parts diagram & fitment
11 vehiclesEnd Cap — locate 8E0121321 Audi Expansion Tank Cap | Engine Cooling OEM in the official exploded view and explore the surrounding assembly.
Parts in this assembly13
Vehicle fitment table11
Europe (8)
| Vehicle | Years | Pos. | Qty | PR |
|---|---|---|---|---|
| Audi A6 2.7 TDI | 2008-2011 | 14 | 1 | T41 |
| Audi A8/S8/qu. lang 08> | 2007- | 11 | 1 | T41 |
| AUDI A6 QU.ALLROAD 07> | 2006- | 14 | 1 | T41 |
| Audi A6/S6/Avant/qu. 05> | 2004- | 14 | 1 | T41 |
| Audi A8/S8/qu. lang | 2003-2007 | 11 | 1 | |
| Audi A4/S4 Cabrio./qu. | 2002-2006 | 8 | 1 | |
| Audi A4/S4/Av./qu. | 2001-2004 | 8 | 1 | |
| Audi A6/Wagon/quattro | 2001-2004 | 8 | 1 |
Other markets (3)
| Vehicle | Years | Pos. | Qty | PR |
|---|---|---|---|---|
| AUDI A6L "CN"05> | 2005- | 8, 14 | 1 | |
| AUDI A4 "CN."06> | 2005- | 8 | 1 | |
| AUDI A4/AV./QU. "CN"03>05 | 2003-2005 | 8 | 1 |
Diagrams & fitment data powered by oemdiagrams.com
8E0121321 Audi Expansion Tank Cap | Engine Cooling OEM is fitted on: Audi A6 2.7 TDI 2008-2011; Audi A8/S8/qu. lang 08> 2007-; AUDI A6 QU.ALLROAD 07> 2006-; Audi A6/S6/Avant/qu. 05> 2004-; Audi A8/S8/qu. lang 2003-2007; Audi A4/S4 Cabrio./qu. 2002-2006; Audi A4/S4/Av./qu. 2001-2004; Audi A6/Wagon/quattro 2001-2004; AUDI A6L "CN"05> 2005-; AUDI A4 "CN."06> 2005-; AUDI A4/AV./QU. "CN"03>05 2003-2005.
