2017-2026 Audi Q7/Q8/RS Q8/SQ8 Steering Rack / Gear Rear 4M0501055AC
OEM Part #: 4M0-501-055-AC (4M0501055AC)
Actual photo
The exact part you’ll receive — not a stock photo.
$999.00
Side: Rear
Used
Donor2021 Audi SQ8 · 4.0L · 47k miles
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Genuine OEM Used
SKU: 701260
Donor Vehicle: 2021 Audi SQ8 · 4.0L · 47k miles
4 photos
$999.00
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Audi steering rack / gear OEM 4M0501055AC is a used genuine rear steering unit, pulled from a donor vehicle. This rack also supersedes 4M0501055AA, 4M0501055T, and 4M0501055S. When the rear steering gear fails, common symptoms include loose or wandering rear-end feel, uneven tire wear, and abnormal noise from the rear axle during low-speed turns. Properly functioning, it actively steers the rear wheels for improved stability and tighter turning radius.
Specifications
| Fits Vehicle Model | Q7, Q8, RS Q8, SQ8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4M0-501-055-AC (4M0501055AC) |
| Compatible OEM Part No | 4M0-501-055-AA, 4M0-501-055-T, 4M0-501-055-S |
| Side | Rear |
| Category | Steering |
Compatible Vehicles
Fits 42 vehicle configurations across 1 make, 2017-2026.
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 42 vehicle configurations — 25 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2026 | Audi | Q8 | SUV | 3.0L V6 Turbo | |
| 2025 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | |
| 2026 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | |
| 2026 | Audi | SQ8 | SUV | 4.0L V8 Turbo | |
| 2024 | Audi | SQ8 | SUV | 4.0L V8 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2020 | Audi | SQ8 | SUV | 4.0L V8 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2025 | Audi | Q8 | SUV | 3.0L V6 Turbo | |
| 2022 | Audi | SQ8 | SUV | 4.0L V8 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2021 | Audi | SQ8 | SUV | 4.0L V8 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2023 | Audi | SQ8 | SUV | 4.0L V8 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2025 | Audi | SQ8 | SUV | 4.0L V8 Turbo | |
| 2024 | Audi | Q7 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2023 | Audi | Q8 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2019 | Audi | Q7 | SUV | 2.0L l4 Turbo | |
| 2024 | Audi | Q8 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2023 | Audi | Q7 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2026 | Audi | Q7 | SUV | 3.0L V6 Turbo | |
| 2025 | Audi | Q7 | SUV | 2.0L l4 Turbo | |
| 2026 | Audi | Q7 | SUV | 2.0L l4 Turbo | |
| 2022 | Audi | Q7 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2022 | Audi | Q7 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2020 | Audi | Q7 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2025 | Audi | Q7 | SUV | 3.0L V6 Turbo | |
| 2017 | Audi | Q7 | SUV | 2.0L l4 Turbo | |
| 2018 | Audi | Q7 | SUV | 3.0L V6 Supercharged | |
| 2018 | Audi | Q7 | SUV | 2.0L l4 Turbo | |
| 2017 | Audi | Q7 | SUV | 3.0L V6 Supercharged | |
| 2022 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2019 | Audi | Q8 | SUV | 3.0L V6 Turbo | |
| 2020 | Audi | Q8 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2019 | Audi | Q7 | SUV | 3.0L V6 Supercharged | |
| 2021 | Audi | Q8 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2021 | Audi | Q7 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2023 | Audi | Q7 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2024 | Audi | Q7 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2022 | Audi | Q8 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2020 | Audi | Q7 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2021 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2020 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2024 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2023 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |
| 2021 | Audi | Q7 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date Between 01/20/20 and 08/14/23 |