United States
Product overview
Genuine OEM Audi EGR Coolant Hose, part number 3C0121157AA. This hose is designed to carry coolant to and from the Exhaust Gas Recirculation (EGR) system, playing a critical role in temperature regulation. It features integrated heat shielding to protect against high engine bay temperatures. Choosing a genuine OEM hose ensures correct routing geometry, material composition, and resistance to thermal cycling and coolant chemicals, preventing leaks and premature failure.
Technical details
- Category
- Engine Cooling
- Country of origin
- Romania
- Customs (HS) code
- 40093100
- Manufacturer
- Audi
- Product Type
- Genuine new auto parts
- Shipping size (L × W × H)
- 24.5 × 8.5 × 5 cm
- Shipping weight
- 0.09 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
34 vehiclesCoolant Hose — locate 3C0121157AA Audi EGR Coolant Hose | Genuine OEM in the official exploded view and explore the surrounding assembly.
Superseded by 03G121132B — the current replacement part.
Parts in this assembly46
- 1Hose 2K0122051
- 1Hose 2K0122051A
- 1Hose 3C0122051BK
- 2Coupl Piece 2K0122291
- 2Coupl Piece 3B0122291C
- 2Coupl Piece 7M3122291B
- 3Seal Ring N90765301
- 4Spring 1J0121142
- 5Bracket 3C0121093
- 6Hose 1K0121086T
- 6Hose 1K0121086AB
- 7Hose 1K0121058BF
- 7Hose 3C0121058AC
- 8Hose 1K0121086AD
- 10Water Pipe 03G121065AA
- 10Water Pipe 03G121065AC
- 11Seal Ring 06B121687
- 12Screw N90588202
- 13Bolt N0102279
- 15Coupl Piece 1K0122291BA
- 16Hose 1K0121101CE
- 16Hose 1K0121101CG
- 16Hose 1K0121101CF
- 16Hose 1K0121101CD
- 17Hose 1K0121447CM
- 17Hose 1K0121447CQ
- 18Hose 1K0122447ED
- 19Tpiece N90693001
- 21Part 3C0121157AB
- 22Coupl Piece 1K0122291H
- 23Coupl Piece 1K0122291J
- 24Hose 1T0122157CA
- 24Hose 1T0122157CJ
- 24Hose 2K0122157AE
- 24Hose 2K0122157AH
- 26Part 03G121151AF
- 27Part N10403203
- 27Part N10524202
- 30Hose 3C0121447L
- 32Hose 3C0122109E
- 32Hose 1K0122109BB
- 33Bracket 1K0121093AQ
- 50Clamp N90686701
- 51Clamp N90686901
- 52Clamp N90687001
- 54Clamp N90687201
Vehicle fitment table34
Europe (30)
| Vehicle | Years | Pos. |
|---|---|---|
| Altea XL Reference | 2010-2013 | 20 |
| Leon Stylance | 2010-2012 | 34 |
| Audi A3 Sportback | 2008-2013 | 20 |
| superb comfort | 2008-2013 | 20 |
| octavia ambiente | 2008-2013 | 20 |
| passat estate | 2008-2011 | 20, 34 |
| jetta | 2008-2011 | 20 |
| caddy panel van | 2008-2010 | 20, 34 |
| Touran 1.9 | 2008-2010 | 20, 34 |
| GOLF VARIANT 07> | 2007- | 20, 34 |
| GOLF PLUS 08> | 2007- | 20, 34 |
| Passat/4Motion 08 | 2007- | 20, 34 |
| Audi A3/S3/Sportb./qu. 08 | 2007- | 20 |
| Audi A3 Cab. 2.0 TDI | 2007-2013 | 20 |
| EOS-Cabriolet-Coupe | 2006- | 34 |
| JETTA 06> | 2006- | 20, 34 |
| TOURAN | 2006- | 20, 34 |
| ALTEA 07> | 2006- | 20 |
| GOLF PLUS 05> | 2005- | 20, 34 |
| JETTA 06> | 2005- | 20, 34 |
| LEON 06> | 2005- | 20, 34 |
| Passat/4Motion | 2005-2007 | 20, 34 |
| Audi A3/S3/quattro | 2005-2007 | 20 |
| TOURAN | 2005-2006 | 20, 34 |
| CADDY | 2004- | 20, 34 |
| TOLEDO 05> | 2004- | 20, 34 |
| OCTAVIA/COMBI/4X4 04> | 2004- | 20 |
| ALTEA | 2004-2006 | 20, 34 |
| GOLF | 2003-2005 | 34 |
| DIES.-IND.-MOT.1,9>2,0 | 1990-2007 | 24 |
Other markets (4)
| Vehicle | Years | Pos. |
|---|---|---|
| DIES.-IND.-MOT.1,9>2,0 08> | 2007- | 24 |
| Golf/Rabbit 08> | 2007- | 20, 34 |
| Jetta "USA"05> | 2005- | 20 |
| Golf/Rabbit | 2005-2007 | 20, 34 |
Diagrams & fitment data powered by oemdiagrams.com
3C0121157AA Audi EGR Coolant Hose | Genuine OEM is fitted on: Altea XL Reference 2010-2013; Leon Stylance 2010-2012; Audi A3 Sportback 2008-2013; superb comfort 2008-2013; octavia ambiente 2008-2013; passat estate 2008-2011; jetta 2008-2011; caddy panel van 2008-2010; Touran 1.9 2008-2010; GOLF VARIANT 07> 2007-; GOLF PLUS 08> 2007-; Passat/4Motion 08 2007-; Audi A3/S3/Sportb./qu. 08 2007-; Audi A3 Cab. 2.0 TDI 2007-2013; EOS-Cabriolet-Coupe 2006-; JETTA 06> 2006-; TOURAN 2006-; ALTEA 07> 2006-; GOLF PLUS 05> 2005-; JETTA 06> 2005-; LEON 06> 2005-; Passat/4Motion 2005-2007; Audi A3/S3/quattro 2005-2007; TOURAN 2005-2006; CADDY 2004-; TOLEDO 05> 2004-; OCTAVIA/COMBI/4X4 04> 2004-; ALTEA 2004-2006; GOLF 2003-2005; DIES.-IND.-MOT.1,9>2,0 1990-2007; DIES.-IND.-MOT.1,9>2,0 08> 2007-; Golf/Rabbit 08> 2007-; Jetta "USA"05> 2005-; Golf/Rabbit 2005-2007.
