2004-2005 Audi Fuel Pressure Regulator Vacuum Hose / Line 078133789A
OEM Part #: 078-133-789-A (078133789A)
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$13.49
Used
Donor2004 Audi ALLROAD · 2.7L
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Genuine OEM Used
SKU: 478343
Donor Vehicle: 2004 Audi ALLROAD · 2.7L
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$13.49
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Used OEM Audi Fuel Pressure Regulator Vacuum Hose / Line (078133789A), also replaces 078133789E. This vacuum hose connects the intake manifold to the fuel pressure regulator. On Audi A4 and Allroad Quattro models with the 2.7L twin-turbo V6 or 3.0L naturally aspirated V6, a cracked or collapsed line can cause fuel pressure fluctuations leading to rough idle, hesitation, or a lean/rich code. It controls vacuum signal to the regulator, directly affecting fuel delivery under load.
Specifications
| Fits Vehicle Model | A4, Allroad |
| Fits Vehicle Make | Audi |
| OEM Part No | 078-133-789-A (078133789A) |
| Compatible OEM Part No | 078-133-789-E |
| Category | Fuel / Emissions |
Compatible Vehicles
Fits 8 vehicle configurations across 1 make, 2004-2005.
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 8 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2005 | Audi | A4 | Quattro Wagon | 3.0L V6 | |
| 2005 | Audi | A4 | Quattro Sedan | 3.0L V6 | |
| 2005 | Audi | A4 | Sedan | 3.0L V6 | |
| 2004 | Audi | Allroad | Quattro Wagon | 2.7L V6 Turbo | |
| 2004 | Audi | A4 | Quattro Wagon | 3.0L V6 | |
| 2004 | Audi | A4 | Quattro Sedan | 3.0L V6 | |
| 2004 | Audi | A4 | Sedan | 3.0L V6 | |
| 2005 | Audi | Allroad | Quattro Wagon | 2.7L V6 Turbo |