2013-2017 Audi S4/S5 Coolant / Water Pump Hose / Line 8K0145921Q
OEM Part #: 8K0-145-921-Q (8K0145921Q)
Actual photo
The exact part you’ll receive — not a stock photo.
$12.99
Used
Donor2013 Audi S4 · 3.0L
✓ Free Same Day Shipping on orders by noon CT
3 Available — Select Your Part:
Genuine OEM Used
SKU: 528551
Donor Vehicle: 2013 Audi S4 · 3.0L
2 photos
$12.99
30-Day Returns
Genuine OEM Used
SKU: 570279
Donor Vehicle: 2015 Audi S4 · 3.0L
2 photos
$12.99
30-Day Returns
Genuine OEM Used
SKU: 710174
Donor Vehicle: 2013 Audi S5 · 3.0L
2 photos
$18.99
30-Day Returns
- Genuine OEM — real photos
- 30-day returns on eligible parts
- eBay Top Rated · 100,000+ positive ratings
- Ships from our own indoor warehouse
Audi coolant/water pump hose, OEM part number 8K0145921Q, is a genuine used component removed from a donor vehicle. This hose or line connects the cooling system on 3.0L supercharged V6 engines (found in A4 Quattro, A5, S4, S5). When the original cracks or leaks, it can cause coolant loss, overheating, or low-coolant warnings. Naming this part as a coolant hose, water pump hose, or line, it directs pressurized coolant between the water pump and engine block—failure here means a quick pressure drop and steam underhood.
Specifications
| Fits Vehicle Model | S4, S5 |
| Fits Vehicle Make | Audi |
| OEM Part No | 8K0-145-921-Q (8K0145921Q) |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 13 vehicle configurations across 1 make, 2013-2017.
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 13 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2016 | Audi | S4 | Sedan | 3.0L V6 Supercharged | |
| 2016 | Audi | S5 | Coupe | 3.0L V6 Supercharged | |
| 2017 | Audi | S5 | Convertible | 3.0L V6 Supercharged | |
| 2016 | Audi | S5 | Convertible | 3.0L V6 Supercharged | |
| 2014 | Audi | S5 | Convertible | 3.0L V6 Supercharged | |
| 2014 | Audi | S5 | Coupe | 3.0L V6 Supercharged | |
| 2014 | Audi | S4 | Sedan | 3.0L V6 Supercharged | |
| 2013 | Audi | S5 | Coupe | 3.0L V6 Supercharged | |
| 2013 | Audi | S5 | Convertible | 3.0L V6 Supercharged | |
| 2013 | Audi | S4 | Sedan | 3.0L V6 Supercharged | |
| 2015 | Audi | S5 | Convertible | 3.0L V6 Supercharged | |
| 2015 | Audi | S4 | Sedan | 3.0L V6 Supercharged | |
| 2015 | Audi | S5 | Coupe | 3.0L V6 Supercharged |