2016-2020 BMW Positive Battery / Alternator / Starter Cable Harness 12428657327
OEM Part #: 12-42-8-657-327 (12428657327)
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The exact part you’ll receive — not a stock photo.
$36.49
Used
Donor2018 BMW 750i xDrive · 4.4L · 42k miles
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Genuine OEM Used
SKU: 585500
Donor Vehicle: 2018 BMW 750i xDrive · 4.4L · 42k miles
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$36.49
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Used BMW positive battery, alternator, and starter cable harness, OEM part number 8657327. This genuine used harness bundles the main power cables from the battery to both the alternator and starter in a single assembly. A common failure point is a frayed or corroded cable jacket, which can cause voltage drops, hard starting, or a no-start condition. This harness is specific to the 4.4L V8 turbocharged engines found in the 750i xDrive, 750Li, Alpina B7, and M550i xDrive.
Specifications
| Fits Vehicle Model | 750i xDrive, Alpina B7, M550i xDrive |
| Fits Vehicle Make | BMW |
| OEM Part No | 12-42-8-657-327 (12428657327) |
| Category | Battery / Charging / Starting |
Compatible Vehicles
Fits 10 vehicle configurations across 1 make, 2016-2020.
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 10 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2020 | BMW | M550i xDrive | Sedan | 4.4L V8 Turbo | |
| 2019 | BMW | M550i xDrive | Sedan | 4.4L V8 Turbo | |
| 2018 | BMW | M550i xDrive | Sedan | 4.4L V8 Turbo | |
| 2017 | BMW | 750i xDrive | Sedan | 4.4L V8 Turbo | |
| 2016 | BMW | 750i xDrive | Sedan | 4.4L V8 Turbo | |
| 2018 | BMW | 750i xDrive | Sedan | 4.4L V8 Turbo | |
| 2019 | BMW | Alpina B7 | Sedan | 4.4L V8 Turbo | |
| 2018 | BMW | Alpina B7 | Sedan | 4.4L V8 Turbo | |
| 2017 | BMW | Alpina B7 | Sedan | 4.4L V8 Turbo | |
| 2019 | BMW | 750i xDrive | Sedan | 4.4L V8 Turbo |