2008-2015 Audi Q7/R8 Coolant Reservoir / Tank / Bottle 420121403
OEM Part #: 420-121-403 (420121403)
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The exact part you’ll receive — not a stock photo.
$33.49
Used
Donor2012 Audi R8 · 4.2L · 41k miles
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Genuine OEM Used
SKU: 570858
Donor Vehicle: 2012 Audi R8 · 4.2L · 41k miles
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$33.49
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Used Audi coolant reservoir / tank / bottle, OEM part number 420121403. This is the genuine expansion tank for the cooling system, also known as the coolant bottle or overflow reservoir. It was removed from a donor vehicle and is a direct replacement for the original part. A cracked or leaking coolant reservoir can cause low coolant warnings, overheating, or visible coolant loss under the hood. This part fits multiple Audi Q7 and R8 models with 3.0L diesel or gas, 4.2L V8, and 5.2L V10 engines.
Specifications
| Fits Vehicle Model | Q7, R8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 420-121-403 (420121403) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 34 vehicle configurations across 1 make, 2008-2015.
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 34 vehicle configurations — 15 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2015 | Audi | Q7 | SUV | 3.0L V6 Supercharged | |
| 2011 | Audi | R8 | Coupe | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2010 | Audi | R8 | Coupe | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2012 | Audi | R8 | Coupe | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2012 | Audi | R8 | GT Coupe | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2009 | Audi | R8 | Coupe | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2012 | Audi | R8 | Spyder Convertible | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2012 | Audi | R8 | GT Spyder Convertible | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2015 | Audi | Q7 | SUV | 3.0L V6 Diesel Turbo | |
| 2015 | Audi | R8 | Spyder Convertible | 4.2L V8 | |
| 2015 | Audi | R8 | Spyder Convertible | 5.2L V10 | |
| 2015 | Audi | R8 | Coupe | 5.2L V10 | |
| 2011 | Audi | R8 | Spyder Convertible | 5.2L V10 | For Vehicles with Engine Code(s) BUJ |
| 2013 | Audi | Q7 | SUV | 3.0L V6 Diesel Turbo | |
| 2013 | Audi | Q7 | SUV | 3.0L V6 Supercharged | |
| 2012 | Audi | R8 | Spyder Convertible | 4.2L V8 | For Vehicles with Engine Code(s) BYH |
| 2012 | Audi | R8 | Coupe | 4.2L V8 | For Vehicles with Engine Code(s) BYH |
| 2011 | Audi | Q7 | SUV | 3.0L V6 Supercharged | |
| 2011 | Audi | Q7 | SUV | 3.0L V6 Diesel Turbo | |
| 2011 | Audi | R8 | Spyder Convertible | 4.2L V8 | For Vehicles with Engine Code(s) BYH |
| 2012 | Audi | Q7 | SUV | 3.0L V6 Supercharged | |
| 2012 | Audi | Q7 | SUV | 3.0L V6 Diesel Turbo | |
| 2011 | Audi | R8 | Coupe | 4.2L V8 | For Vehicles with Engine Code(s) BYH |
| 2010 | Audi | Q7 | SUV | 3.0L V6 Diesel Turbo | |
| 2010 | Audi | R8 | Coupe | 4.2L V8 | For Vehicles with Engine Code(s) BYH |
| 2009 | Audi | R8 | Coupe | 4.2L V8 | For Vehicles with Engine Code(s) BYH |
| 2008 | Audi | R8 | Coupe | 4.2L V8 | For Vehicles with Engine Code(s) BYH |
| 2014 | Audi | R8 | Coupe | 4.2L V8 | |
| 2014 | Audi | Q7 | SUV | 3.0L V6 Diesel Turbo | |
| 2014 | Audi | Q7 | SUV | 3.0L V6 Supercharged | |
| 2014 | Audi | R8 | Spyder Convertible | 5.2L V10 | |
| 2014 | Audi | R8 | Coupe | 5.2L V10 | |
| 2014 | Audi | R8 | Spyder Convertible | 4.2L V8 | |
| 2015 | Audi | R8 | Coupe | 4.2L V8 |