Audi A4/A5 Coolant Tank Overflow Hose / Line 8K0121081Q
OEM Part #: 8K0-121-081-Q (8K0121081Q)
This page covers one exact OEM part number. Every unit we stocked has sold.
We may be able to get another
Used OEM parts are one-of-a-kind. We sometimes get another when we dismantle a matching vehicle, but we can’t say when — browse what’s in stock now:
Other Coolant Hose / Pipe / Line that may fit your vehicle
Auxiliary Coolant / Water Pump Hose
$11.99
Fits 2009–2016 Audi
OEM: 06H121057G
Auxiliary Coolant / Water Pump Hose
$12.99
Fits 2009–2016 Audi
OEM: 06H121057E
Coolant / Water Hose
$11.49
Fits 2005–2015 Audi & Volkswagen
OEM: 06E121058D
Coolant / Water Pump Hose
$69.99
Fits 2009–2017 Audi
OEM: 8R0121049AL
Coolant / Water Pump Hose
$49.99
Fits 2009–2017 Audi
OEM: 8K0121051C
Coolant Flange / Adapter
Starting at $6.99
Fits 2006–2025 Audi & Volkswagen
OEM: N906929
- Genuine OEM — real photos
- 30-day returns on eligible parts
- eBay Top Rated · 100,000+ positive ratings
- Ships from our own indoor warehouse
Specifications
| Fits Vehicle Model | A4, A5 |
| Fits Vehicle Make | Audi |
| OEM Part No | 8K0-121-081-Q (8K0121081Q) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 21 vehicle configurations across 1 make, 2009-2012.
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 21 vehicle configurations — 6 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2009 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2009 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | |
| 2009 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2010 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2010 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | |
| 2010 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2010 | Audi | A5 | Convertible | 2.0L l4 Turbo | For Vehicles with Engine Code(s) CAEA, CAEB, CDNB, CDNC |
| 2010 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | |
| 2010 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Vehicles with Engine Code(s) CAEA, CAEB, CDNB, CDNC |
| 2011 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2011 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | |
| 2011 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2011 | Audi | A5 | Convertible | 2.0L l4 Turbo | For Vehicles with Engine Code(s) CAEA, CAEB, CDNB, CDNC |
| 2011 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Vehicles with Engine Code(s) CAEA, CAEB, CDNB, CDNC |
| 2011 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | |
| 2012 | Audi | A4 | Sedan | 2.0L l4 Turbo | |
| 2012 | Audi | A4 | Quattro Wagon | 2.0L l4 Turbo | |
| 2012 | Audi | A4 | Quattro Sedan | 2.0L l4 Turbo | |
| 2012 | Audi | A5 | Convertible | 2.0L l4 Turbo | For Vehicles with Engine Code(s) CAEA, CAEB, CDNB, CDNC |
| 2012 | Audi | A5 | Quattro Coupe | 2.0L l4 Turbo | |
| 2012 | Audi | A5 | Quattro Convertible | 2.0L l4 Turbo | For Vehicles with Engine Code(s) CAEA, CAEB, CDNB, CDNC |