2017-2026 Audi Q7/Q8/RS Q8/SQ7/SQ8 AC Expansion Valve 4M0816181A
OEM Part #: 4M0-816-181-A (4M0816181A)
Actual photo
The exact part you’ll receive — not a stock photo.
$39.99
Used
Donor2021 Audi SQ8 · 4.0L · 47k miles
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Genuine OEM Used
SKU: 701092
Donor Vehicle: 2021 Audi SQ8 · 4.0L · 47k miles
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$39.99
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Audi AC Expansion Valve, OEM part number 4M0816181A, is a used genuine component from a donor vehicle. This valve controls refrigerant flow into the evaporator, and when it fails, common symptoms include weak or inconsistent cabin cooling and hissing noises from the dash. It fits multiple Audi Q7, Q8, RS Q8, SQ7, and SQ8 models with 2.0L, 3.0L, and 4.0L engine options, including turbocharged, supercharged, diesel, and hybrid variants.
Specifications
| Fits Vehicle Model | Q7, Q8, RS Q8, SQ7, SQ8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4M0-816-181-A (4M0816181A) |
| Category | Air Conditioning |
Compatible Vehicles
Fits 44 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 44 vehicle configurations — 13 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2024 | Audi | SQ7 | SUV | 4.0L V8 Turbo | For Auxiliary HVAC |
| 2020 | Audi | SQ7 | SUV | 4.0L V8 Turbo | For Auxiliary HVAC |
| 2020 | Audi | SQ8 | SUV | 4.0L V8 Turbo | For Auxiliary HVAC |
| 2021 | Audi | SQ7 | SUV | 4.0L V8 Turbo | For Auxiliary HVAC |
| 2025 | Audi | SQ7 | SUV | 4.0L V8 Turbo | For Auxiliary HVAC |
| 2025 | Audi | SQ8 | SUV | 4.0L V8 Turbo | For Auxiliary HVAC |
| 2025 | Audi | Q8 | SUV | 3.0L V6 Turbo | For Auxiliary HVAC, R1234yf Refrigerant |
| 2024 | Audi | SQ8 | SUV | 4.0L V8 Turbo | For Auxiliary HVAC |
| 2021 | Audi | SQ8 | SUV | 4.0L V8 Turbo | For Auxiliary HVAC |
| 2022 | Audi | SQ8 | SUV | 4.0L V8 Turbo | For Auxiliary HVAC |
| 2022 | Audi | SQ7 | SUV | 4.0L V8 Turbo | For Auxiliary HVAC |
| 2023 | Audi | SQ7 | SUV | 4.0L V8 Turbo | For Auxiliary HVAC |
| 2023 | Audi | SQ8 | SUV | 4.0L V8 Turbo | For Auxiliary HVAC |
| 2024 | Audi | Q7 | SUV | 3.0L V6 Turbo | |
| 2023 | Audi | Q8 | SUV | 3.0L V6 Turbo | |
| 2019 | Audi | Q7 | SUV | 2.0L l4 Turbo | |
| 2024 | Audi | Q8 | SUV | 3.0L V6 Turbo | |
| 2023 | Audi | Q7 | SUV | 3.0L V6 Turbo | |
| 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 | |
| 2022 | Audi | Q7 | SUV | 2.0L l4 Turbo | |
| 2020 | Audi | Q7 | SUV | 3.0L V6 Turbo | |
| 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 | |
| 2019 | Audi | Q8 | SUV | 3.0L V6 Turbo | |
| 2020 | Audi | Q8 | SUV | 3.0L V6 Turbo | |
| 2019 | Audi | Q7 | SUV | 3.0L V6 Supercharged | |
| 2021 | Audi | Q8 | SUV | 3.0L V6 Turbo | |
| 2021 | Audi | Q7 | SUV | 3.0L V6 Turbo | |
| 2023 | Audi | Q7 | SUV | 2.0L l4 Turbo | |
| 2024 | Audi | Q7 | SUV | 2.0L l4 Turbo | |
| 2022 | Audi | Q8 | SUV | 3.0L V6 Turbo | |
| 2020 | Audi | Q7 | SUV | 2.0L l4 Turbo | |
| 2021 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | |
| 2020 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | |
| 2024 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | |
| 2023 | Audi | RS Q8 | SUV | 4.0L V8 Turbo | |
| 2021 | Audi | Q7 | SUV | 2.0L l4 Turbo |