2017-2026 Audi Brake Pad Wear Indicator Sensor / Wiring Harness Front 4M0615121AC
OEM Part #: 4M0-615-121-AC (4M0615121AC)
Actual photo
The exact part you’ll receive — not a stock photo.
$29.99
Side: Front
Used
Donor2021 Audi SQ8 · 4.0L · 47k miles
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Genuine OEM Used
SKU: 701545
Donor Vehicle: 2021 Audi SQ8 · 4.0L · 47k miles
2 photos
$29.99
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The Audi Brake Pad Wear Indicator Sensor (OEM 4M0615121AC) is a used genuine front wiring harness that also replaces 4M0615121T, 4M0615121Q, and 4M0615121A. This sensor monitors pad thickness through an electrical contact; when the pads wear down, the circuit opens and triggers the dashboard brake wear warning light. Compatible with various Audi Q7, Q8, SQ7, and SQ8 engine configurations including turbocharged four-cylinder, V6 diesel, supercharged, mild-hybrid, and plug-in hybrid V6, as well as the V8 mild-hybrid.
Specifications
| Fits Vehicle Model | Q7, Q8, SQ7, SQ8 |
| Fits Vehicle Make | Audi |
| OEM Part No | 4M0-615-121-AC (4M0615121AC) |
| Compatible OEM Part No | 4M0-615-121-T, 4M0-615-121-Q, 4M0-615-121-A |
| Side | Front |
| Category | Other |
Compatible Vehicles
Fits 38 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 38 vehicle configurations — 22 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2025 | Audi | SQ7 | SUV | 4.0L V8 Turbo | |
| 2020 | Audi | SQ7 | SUV | 4.0L V8 Turbo | to 11/25/2019 |
| 2021 | Audi | SQ7 | SUV | 4.0L V8 Turbo | |
| 2020 | Audi | SQ8 | SUV | 4.0L V8 Turbo | to 11/25/2019 |
| 2021 | Audi | SQ8 | SUV | 4.0L V8 Turbo | |
| 2022 | Audi | SQ8 | SUV | 4.0L V8 Turbo | |
| 2025 | Audi | SQ8 | SUV | 4.0L V8 Turbo | |
| 2022 | Audi | SQ7 | SUV | 4.0L V8 Turbo | |
| 2023 | Audi | SQ7 | SUV | 4.0L V8 Turbo | |
| 2023 | Audi | SQ8 | SUV | 4.0L V8 Turbo | |
| 2024 | Audi | SQ7 | SUV | 4.0L V8 Turbo | |
| 2024 | Audi | SQ8 | SUV | 4.0L V8 Turbo | |
| 2026 | Audi | Q7 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2019 | Audi | Q7 | SUV | 2.0L l4 Turbo | |
| 2024 | Audi | Q8 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2023 | Audi | Q7 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2025 | Audi | Q7 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2026 | Audi | Q7 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2022 | Audi | Q7 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2023 | Audi | Q8 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2022 | Audi | Q7 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2020 | Audi | Q7 | SUV | 3.0L V6 Turbo | |
| 2025 | Audi | Q7 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2024 | Audi | Q7 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2017 | Audi | Q7 | SUV | 2.0L l4 Turbo | For Vehicles With Production date Up To 11/25/19 |
| 2018 | Audi | Q7 | SUV | 3.0L V6 Supercharged | For Vehicles With Production date Up To 11/25/19 |
| 2018 | Audi | Q7 | SUV | 2.0L l4 Turbo | For Vehicles With Production date Up To 11/25/19 |
| 2020 | Audi | Q8 | SUV | 3.0L V6 Turbo | |
| 2017 | Audi | Q7 | SUV | 3.0L V6 Supercharged | For Vehicles With Production date Up To 11/25/19 |
| 2019 | Audi | Q8 | SUV | 3.0L V6 Turbo | |
| 2019 | Audi | Q7 | SUV | 3.0L V6 Supercharged | |
| 2021 | Audi | Q8 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2021 | Audi | Q7 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2023 | Audi | Q7 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2024 | Audi | Q7 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2022 | Audi | Q8 | SUV | 3.0L V6 Turbo | For Vehicles with Production Date After 11/25/19 |
| 2020 | Audi | Q7 | SUV | 2.0L l4 Turbo | |
| 2021 | Audi | Q7 | SUV | 2.0L l4 Turbo | For Vehicles with Production Date After 11/25/19 |