United States
Product overview
Genuine OEM Audi Engine Coolant Expansion Tank, part number 8K0121403Q. This essential component of the engine cooling system serves as a reservoir for excess coolant and allows for the thermal expansion and contraction of the coolant as engine temperatures fluctuate. It helps maintain proper system pressure and ensures a consistent coolant level. Crafted from durable, heat-resistant plastic, it measures approximately 0.3m in length. Using a genuine OEM expansion tank ensures precise fitment, correct fluid capacity, and the necessary pressure retention capabilities for optimal engine cooling and longevity.
Technical details
- Category
- Engine Cooling
- Country of origin
- Italy
- Customs (HS) code
- 87089997
- Manufacturer
- Audi
- Product Type
- Genuine new auto parts
- Shipping size (L × W × H)
- 30 × 28 × 14.5 cm
- Shipping weight
- 0.6 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
10 vehiclesReservoir — locate 8K0121403Q Audi Engine Coolant Expansion Tank | Genuine OEM in the official exploded view and explore the surrounding assembly.
This part is marked discontinued by the manufacturer (since 2017-03-01); contact us to check current availability.
Parts in this assembly38
- 1Tank 9A712140300
- 2Cover 95810644700
- 3Ut"hex Nut Self-locking With Washer Hex Nut N90570803
- 4Grommet 8K0129669
- 5Grommet 8R0121585
- 6Line 95B122447F
- 6Line 95B122447B
- 7Line 95B121447A
- 8Clamp N90770201
- 9Bracket 99950790540
- 10Hose 95B121049A
- 11Clamp N90687001
- 12Water Pipe 95B121049E
- 13Tpiece N90760601
- 14Clamp N90687101
- 15Clamp 99951265409
- 16Hose 95B122101A
- 17Hose 95B121109F
- 18Spring 95510614300
- 19Sensor 95510612501
- 20Seal Ring N90316801
- 21Bracket WHT006829
- 22Hose 95B121056
- 22Hose 95B121056A
- 24Adapter 95812113200
- 25Seal Ring WHT001688
- 26Screw N91099101
- 27Coupl Piece 3B0122291C
- 28Coupl Piece 8K0122293AE
- 29Clamp 99951266509
- 30Cleaner 00004320439
- 30Coolant AdRight00004330148
- 30Coolant AdLeft00004330515
- 30Coolant AdRight00004330516
- 30Cleaner 00004330564
- 30Coolant AdLeft00004330147
- 31Seal Ring N90765301
- 32Spring 1J0121142
Vehicle fitment table10
Europe (9)
| Vehicle | Years | Pos. | Qty | Remark | PR |
|---|---|---|---|---|---|
| Macan GTS | 2013-2018 | 1 | |||
| Audi Q5 qu. 2.0 TDI | 2012-2017 | 10 | 1 | PR:TD1,TM4 | TD1 |
| Audi A5 Sportback | 2011-2017 | 10 | 1 | PR:TD1,TM4 | TD1 |
| Audi A5 Cabrio 2.0 | 2011-2017 | 10 | 1 | PR:TD1,TM4 | TD1 |
| audi a4 av. 2.0 tdi | 2011-2015 | 10 | 1 | PR:TD1,TM4 | TD1 |
| Audi Q5 qu. 2.0 | 2009-2018 | 10 | 1 | ||
| Audi A4 Av. Allroad | 2008-2016 | 10 | 1 | R:T | |
| Audi Q5 qu. 2.0 TDI | 2008-2012 | 10 | 1 | CAHA, | CAH |
| AUDI A4 08> | 2007- | 10 | 1 | CABB,C | AGA |
Other markets (1)
| Vehicle | Years | Pos. | Qty | Remark | PR |
|---|---|---|---|---|---|
| Audi A4L 2.0 | 2008-2012 | 10 | 1 | CA | DA, |
Diagrams & fitment data powered by oemdiagrams.com
8K0121403Q Audi Engine Coolant Expansion Tank | Genuine OEM is fitted on: Macan GTS 2013-2018; Audi Q5 qu. 2.0 TDI 2012-2017; Audi A5 Sportback 2011-2017; Audi A5 Cabrio 2.0 2011-2017; audi a4 av. 2.0 tdi 2011-2015; Audi Q5 qu. 2.0 2009-2018; Audi A4 Av. Allroad 2008-2016; Audi Q5 qu. 2.0 TDI 2008-2012; AUDI A4 08> 2007-; Audi A4L 2.0 2008-2012.
