2015-2021 BMW M2/M3/M4 Positive Battery / Alternator / Starter 12427857551
OEM Part #: 12-42-7-857-551 (12427857551)
Actual photo
The exact part you’ll receive — not a stock photo.
$35.49
Used
Donor2018 BMW M4 · 3.0L · 50k miles
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Genuine OEM Used
SKU: 538746
Donor Vehicle: 2018 BMW M4 · 3.0L · 50k miles
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$35.49
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We offer a used OEM positive battery / alternator / starter cable (part number 7857551) from a BMW donor vehicle. It also replaces 7851482. This cable is specific to the 3.0L 2979CC I6 GAS DOHC Turbocharged engine found in M2, M3, and M4 models. It carries power between the battery, alternator, and starter. A failure can cause a no-start condition or charging system issues.
Specifications
| Fits Vehicle Model | M2, M3, M4 |
| Fits Vehicle Make | BMW |
| OEM Part No | 12-42-7-857-551 (12427857551) |
| Compatible OEM Part No | 7851482 |
| Category | Battery / Charging / Starting |
Compatible Vehicles
Fits 20 vehicle configurations across 1 make, 2015-2021.
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 20 vehicle configurations — 20 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2021 | BMW | M2 | Coupe | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2020 | BMW | M2 | Coupe | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2019 | BMW | M2 | Coupe | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2019 | BMW | M4 | Coupe | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2020 | BMW | M4 | Coupe | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2015 | BMW | M4 | Convertible | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2016 | BMW | M4 | GTS Coupe | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2019 | BMW | M4 | Convertible | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2017 | BMW | M4 | Convertible | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2016 | BMW | M4 | Convertible | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2018 | BMW | M4 | Coupe | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2020 | BMW | M4 | Convertible | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2015 | BMW | M4 | Coupe | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2018 | BMW | M4 | Convertible | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2016 | BMW | M4 | Coupe | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2018 | BMW | M3 | Sedan | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2016 | BMW | M3 | Sedan | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2017 | BMW | M3 | Sedan | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2015 | BMW | M3 | Sedan | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |
| 2017 | BMW | M4 | Coupe | 3.0L l6 Turbo | For Vehicles with Production Date After 10/2015 |