United States
Product overview
Genuine OEM Audi Coolant Overflow Tank Breather Line, part number 4G0121081AJ. This line serves a crucial role in the cooling system by allowing air and excess pressure to escape from the coolant overflow tank, maintaining proper system pressure and preventing damage. It is a flexible conduit within the cooling circuit. Weighing 0.042 kg and measuring 0.385 m in length, this line is manufactured from durable plastic and rubber. Using a genuine OEM breather line ensures correct routing, material compatibility, and resistance to thermal and chemical degradation, preventing blockages and maintaining system integrity.
Catalogue entry: PIPE front center.
Technical details
- Category
- Engine Cooling
- Country of origin
- Germany
- Customs (HS) code
- 40093100
- Manufacturer
- Audi
- Product Type
- Genuine new auto parts
- Shipping size (L × W × H)
- 38.5 × 27 × 6 cm
- Shipping weight
- 0.04 kg
Specifications
As recorded in the manufacturer’s parts catalogue for this part number.
Equipment codes
- T44
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.
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
6 vehiclesBreather Line — locate 4G0121081AJ Audi Coolant Breather Line | Genuine OEM in the official exploded view and explore the surrounding assembly.
Parts in this assembly37
- 1Hose 4G0122101
- 2Seal Ring 4E0121666
- 3Spring 4E0121142
- 4Water Pipe 06E121065Q
- 5Seal Ring N90316801
- 6Bolt N91140701
- 7Hose 06E121058F
- 8Water Pipe 06E121044M
- 8Water Pipe 06E121044G
- 9Seal Ring N90925001
- 10Bolt N10124408
- 11Hose 06E121030B
- 11Hose 06E121030A
- 12Hose 06E121058E
- 13Hose 06E121088B
- 14Pump 06E121601C
- 16Bracket 06E121521F
- 17Bolt N10636501
- 18Hose 06E121088F
- 19Water Pipe 06E121045AB
- 20Seal Ring 06E121119A
- 21Hose 06E121445B
- 24Sender 06A919501A
- 26Spring 032121142
- 27Pipe 4G0121081AE
- 29Bracket N10507901
- 30Hose 4G0121049Q
- 33Hose 4G0122109A
- 34Water Pipe 4G0121071N
- 34Water Pipe 4G0121071L
- 35Bolt N91069601
- 35Collar Nut N01508210
- 36Hose 4G0122109
- 70Clamp N90686701
- 72Clamp N90686902
- 73Clamp N90687001
- 74Clamp N90687101
Vehicle fitment table6
Europe (4)
| Vehicle | Years | Pos. | Qty | PR |
|---|---|---|---|---|
| Audi A7 Sportback | 2014-2018 | 28 | 1 | T44 |
| audi a6 qu. 3.0 tdi | 2014-2018 | 28 | 1 | |
| Audi A7 Sportback | 2010-2015 | 28 | 1 | T44 |
| audi a6 2.0 tdi | 2010-2015 | 28 | 1 |
Other markets (2)
| Vehicle | Years | Pos. | Qty | PR |
|---|---|---|---|---|
| audi a6 1.8 | 2015-2019 | 28 | 1 | TF8 |
| Audi A6 L 2.0 | 2011-2013 | 28 | 1 | T8Z |
Diagrams & fitment data powered by oemdiagrams.com
4G0121081AJ Audi Coolant Breather Line | Genuine OEM is fitted on: Audi A7 Sportback 2014-2018; audi a6 qu. 3.0 tdi 2014-2018; Audi A7 Sportback 2010-2015; audi a6 2.0 tdi 2010-2015; audi a6 1.8 2015-2019; Audi A6 L 2.0 2011-2013.