2013-2014 Audi A8/S8 Lower Coolant Line / Pipe Left 4H0121400AD
OEM Part #: 4H0-121-400-AD (4H0121400AD)
Actual photo
The exact part you’ll receive — not a stock photo.
$24.49
Side: Left
Used
Donor2013 Audi A8 · 4.0L
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Genuine OEM Used
SKU: 566684
Donor Vehicle: 2013 Audi A8 · 4.0L
2 photos
$24.49
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Genuine OEM Used
SKU: 609434
Donor Vehicle: 2013 Audi A8 · 4.0L
4 photos
$24.49
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Genuine OEM Used
SKU: 577795
Donor Vehicle: 2014 Audi A8 · 4.0L
2 photos
$24.49
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A used OEM Audi Lower Coolant Line / Pipe, OEM part number 4H0121400AD, removed from a donor vehicle. This left-side coolant pipe routes coolant through the engine bay on 4.0L V8 turbocharged applications. Also known as a lower coolant pipe, it's a common failure point for coolant leaks that can lead to overheating.
Specifications
| Fits Vehicle Model | A8, S8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4H0-121-400-AD (4H0121400AD) |
| Side | Left |
| Category | Transmission |
Compatible Vehicles
Fits 6 vehicle configurations across 1 make, 2013-2014.
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 6 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2013 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2013 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | |
| 2013 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo |