2013-2018 Audi A8/S8 Brake Booster Vacuum Pipe / Hose / Line 4H0611931AK
OEM Part #: 4H0-611-931-AK (4H0611931AK)
Actual photo
The exact part you’ll receive — not a stock photo.
$30.99
Used
Donor2014 Audi A8 · 4.0L
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Genuine OEM Used
SKU: 540936
Donor Vehicle: 2014 Audi A8 · 4.0L
2 photos
$30.99
30-Day Returns
Genuine OEM Used
SKU: 544557
Donor Vehicle: 2014 Audi A8 · 4.0L
2 photos
$30.99
30-Day Returns
- Genuine OEM — real photos
- 30-day returns on eligible parts
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This used genuine Audi brake booster vacuum pipe, OEM 4H0611931AK, also supersedes 4H0611931H. This hose or line connects the brake booster to the engine’s vacuum source on the 4.0L V8 turbo engine (found in the A8 and S8). When it cracks or leaks, you’ll notice a hard brake pedal and reduced power assist—a common failure that can be diagnosed with a vacuum test. Replace only with the correct OEM pipe to ensure proper fit and sealing.
Specifications
| Fits Vehicle Model | A8, S8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4H0-611-931-AK (4H0611931AK) |
| Compatible OEM Part No | 4H0-611-931-H |
| Category | Brake Booster |
Compatible Vehicles
Fits 15 vehicle configurations across 1 make, 2013-2018.
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 15 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2017 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2016 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2018 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2018 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2017 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2015 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2016 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2015 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2015 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | |
| 2013 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | A8 | Quattro Sedan | 4.0L V8 Turbo | |
| 2013 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | A8 | Quattro L Sedan | 4.0L V8 Turbo | |
| 2014 | Audi | S8 | Sedan | 4.0L V8 Turbo | |
| 2013 | Audi | S8 | Sedan | 4.0L V8 Turbo |