1997-2002 Audi A6/A8/Allroad/S8 Servotronic Relay # 356 4D0907307
OEM Part #: 4D0-907-307 (4D0907307)
Actual photo
The exact part you’ll receive — not a stock photo.
$6.68
Used
Donor1997 Audi A8 · 4.2L
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Genuine OEM Used
SKU: 496601
Donor Vehicle: 1997 Audi A8 · 4.2L
$6.68
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This genuine Audi servotronic relay, OEM 4D0907307, is a used replacement part that also supersedes 4D0907307A. The servotronic relay, also known as relay #356, controls the speed-sensitive power steering assist on select Audi models with 2.7L turbo V6, 2.8L V6, 3.7L V8, and 4.2L V8 engines. When this relay fails, steering assist may become stuck at a single level rather than adjusting with vehicle speed, often triggering a warning light.
Specifications
| Fits Vehicle Model | A6, A8, Allroad, S8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4D0-907-307 (4D0907307) |
| Compatible OEM Part No | 4D0-907-307-A |
| Category | Relay / Fuse |
Compatible Vehicles
Fits 27 vehicle configurations across 1 make, 1997-2002.
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 27 vehicle configurations — 1 with fitment note
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 1997 | Audi | A8 | Sedan | 3.7L V8 | |
| 1997 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 1998 | Audi | A6 | Sedan | 2.8L V6 | |
| 1998 | Audi | A6 | Quattro Sedan | 2.8L V6 | |
| 1998 | Audi | A8 | Sedan | 3.7L V8 | |
| 1998 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 1999 | Audi | A8 | Sedan | 3.7L V8 | |
| 1999 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2000 | Audi | A6 | Sedan | 2.8L V6 | |
| 2000 | Audi | A6 | Quattro Wagon | 2.8L V6 | |
| 2000 | Audi | A6 | Quattro Sedan | 2.7L V6 Turbo | |
| 2000 | Audi | A6 | Quattro Sedan | 2.8L V6 | |
| 2000 | Audi | A6 | Quattro Sedan | 4.2L V8 | |
| 2000 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2000 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2001 | Audi | A6 | Sedan | 2.8L V6 | |
| 2001 | Audi | A6 | Quattro Wagon | 2.8L V6 | |
| 2001 | Audi | A6 | Quattro Sedan | 2.7L V6 Turbo | |
| 2001 | Audi | A6 | Quattro Sedan | 2.8L V6 | |
| 2001 | Audi | A6 | Quattro Sedan | 4.2L V8 | |
| 2001 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2001 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2001 | Audi | Allroad | Quattro Wagon | 2.7L V6 Turbo | For Vehicles Where Last 6 Digits of VIN Number are Less Than 200000 |
| 2001 | Audi | S8 | Sedan | 4.2L V8 | |
| 2002 | Audi | A8 | Quattro Sedan | 4.2L V8 | |
| 2002 | Audi | A8 | Quattro L Sedan | 4.2L V8 | |
| 2002 | Audi | S8 | Sedan | 4.2L V8 |