2009-2017 Audi A4/A5/Q5/S5/SQ5/allroad Radiator 8K0121251AJ
OEM Part #: 8K0-121-251-AJ (8K0121251AJ)
Actual photo
The exact part you’ll receive — not a stock photo.
$71.49
Used
Donor2012 Audi A5 QUATTRO · 2.0L
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Genuine OEM Used
SKU: 689543
Donor Vehicle: 2012 Audi A5 QUATTRO · 2.0L
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$71.49
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Used Audi OEM radiator, part number 8K0121251AJ, is a genuine replacement from a donor vehicle. This radiator serves as the engine's primary cooling component, managing heat transfer for the coolant system. A common failure symptom is visible coolant leakage around the plastic end tanks or core, leading to overheating. It fits multiple 1.8L and 2.0L turbocharged four-cylinder engines, including the 2.0L TFSI and TSI variants, as well as 3.0L V6 engines across Audi A4, A5, Q5, and S5/SQ5 models.
Specifications
| Fits Vehicle Model | A4, A5, allroad, Q5, S5, SQ5 |
| Fits Vehicle Make | Audi |
| OEM Part No | 8K0-121-251-AJ (8K0121251AJ) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 67 vehicle configurations across 1 make, 2009-2017.
Check your specific vehicle before ordering.
This list shows year, make, and model. Some years have multiple trims or
engines that use different parts, and individual listings may have
additional fitment notes (e.g. “with sunroof only”). Review
the full variant list below, or
message us with your VIN
and we’ll confirm the match.
View all 67 vehicle configurations — 54 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2016 | Audi | allroad | Wagon | 2.0L l4 Turbo | For Automatic Transmission; For Vehicles with Engine Code(s) CDNC, CPMA, CPMB |
| 2015 | Audi | allroad | Wagon | 2.0L l4 Turbo | For Automatic Transmission; For Vehicles with Engine Code(s) CDNC, CPMA, CPMB |
| 2014 | Audi | allroad | Wagon | 2.0L l4 Turbo | For Automatic Transmission; For Vehicles with Engine Code(s) CDNC, CPMA, CPMB |
| 2013 | Audi | allroad | Wagon | 2.0L l4 Turbo | For Automatic Transmission; For Vehicles with Engine Code(s) CDNC, CPMA, CPMB |
| 2017 | Audi | Q5 | SUV | 3.0L V6 Supercharged | |
| 2017 | Audi | Q5 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date After 12/15/14 |
| 2016 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Automatic Transmission |
| 2016 | Audi | S5 | Coupe | 3.0L V6 Supercharged | For Automatic Transmission |
| 2016 | Audi | Q5 | SUV | 3.0L V6 Supercharged | |
| 2010 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2010 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2017 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Automatic Transmission |
| 2017 | Audi | SQ5 | SUV | 3.0L V6 Supercharged | |
| 2016 | Audi | Q5 | SUV | 3.0L V6 Diesel Turbo | |
| 2016 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2016 | Audi | SQ5 | SUV | 3.0L V6 Supercharged | |
| 2016 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | For Automatic Transmission |
| 2016 | Audi | Q5 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date After 12/15/14 |
| 2016 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2012 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | For Automatic Transmission |
| 2010 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Automatic Transmission; For Vehicles with Engine Code(s) CAEA, CAEB, CDNB, CDNC |
| 2010 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | For Automatic Transmission |
| 2009 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | For Automatic Transmission |
| 2011 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2010 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | For Automatic Transmission |
| 2012 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2011 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | For Automatic Transmission |
| 2011 | Audi | Q5 | SUV | 2.0L l4 Turbo | For Automatic Transmission |
| 2012 | Audi | Q5 | SUV | 2.0L l4 Turbo | For Automatic Transmission |
| 2011 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Automatic Transmission; For Vehicles with Engine Code(s) CAEA, CAEB, CDNB, CDNC |
| 2012 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Automatic Transmission; For Vehicles with Engine Code(s) CAEA, CAEB, CDNB, CDNC |
| 2012 | Audi | A5 | Convertible | 2.0L l4 Turbo | For Automatic Transmission; For Vehicles with Engine Code(s) CAEA, CAEB, CDNB, CDNC |
| 2012 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | For Automatic Transmission |
| 2011 | Audi | A5 | Convertible | 2.0L l4 Turbo | For Automatic Transmission; For Vehicles with Engine Code(s) CAEA, CAEB, CDNB, CDNC |
| 2012 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2009 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2010 | Audi | A5 | Convertible | 2.0L l4 Turbo | For Automatic Transmission; For Vehicles with Engine Code(s) CAEA, CAEB, CDNB, CDNC |
| 2011 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2011 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | For Automatic Transmission |
| 2009 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2015 | Audi | Q5 | SUV | 3.0L V6 Supercharged | |
| 2015 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2015 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2015 | Audi | S5 | Coupe | 3.0L V6 Supercharged | For Automatic Transmission |
| 2015 | Audi | Q5 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date After 12/15/14 |
| 2014 | Audi | SQ5 | SUV | 3.0L V6 Supercharged | |
| 2014 | Audi | Q5 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date After 12/15/14 |
| 2014 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Automatic Transmission |
| 2014 | Audi | A5 | Convertible | 2.0L l4 Turbo | For Automatic Transmission |
| 2013 | Audi | Q5 | SUV | 2.0L l4 Turbo | |
| 2013 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | For Automatic Transmission |
| 2013 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2013 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Automatic Transmission |
| 2013 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2013 | Audi | A5 | Convertible | 2.0L l4 Turbo | For Automatic Transmission |
| 2013 | Audi | Q5 | SUV | 3.0L V6 Supercharged | |
| 2013 | Audi | S5 | Coupe | 3.0L V6 Supercharged | For Automatic Transmission |
| 2014 | Audi | Q5 | SUV | 3.0L V6 Supercharged | |
| 2014 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | For Automatic Transmission |
| 2014 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2014 | Audi | S5 | Coupe | 3.0L V6 Supercharged | For Automatic Transmission |
| 2014 | Audi | A4 | Sedan | 2.0L l4 Turbo | For Automatic Transmission |
| 2015 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Automatic Transmission |
| 2015 | Audi | Q5 | SUV | 3.0L V6 Diesel Turbo | |
| 2015 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | For Automatic Transmission |
| 2014 | Audi | Q5 | SUV | 3.0L V6 Diesel Turbo | |
| 2015 | Audi | SQ5 | SUV | 3.0L V6 Supercharged |