48-volt power cable
Maintain flawless cranking and trouble-free jump-starts on your mild-hybrid 3 Series with the genuine 48-volt power cable (part number 61125A32FC9). Running from the integrated starter-generator to the under-bonnet boost post, this heavy-gauge lead delivers up to 250 A during start and recuperation events while keeping voltage-drop within BMW’s strict 0.15 V limit.
BMW 48-V Starter-Generator Power Cable 61125A32FC9
Maintain flawless cranking and trouble-free jump-starts on your mild-hybrid 3 Series with the genuine 48-volt power cable (part number 61125A32FC9). Running from the integrated starter-generator to the under-bonnet boost post, this heavy-gauge lead delivers up to 250 A during start and recuperation events while keeping voltage-drop within BMW’s strict 0.15 V limit.
Key Benefits
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Exact OEM Geometry – pre-formed copper conductor with factory crimped eyelets follows the original routing; installs in minutes with no cutting or re-terminating.
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Twin-Layer Insulation – cross-linked polyolefin inner sheath plus abrasion-resistant PVC over-jacket withstand continuous 125 °C under-bonnet temperatures.
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Low-Resistance Core – 35 mm² oxygen-free copper keeps voltage sag minimal, ensuring smooth auto-stop/start restarts.
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Integrated VIN Label – heat-shrink marker shows part number for future service identification.
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Warranty-Backed – protected by BMW’s 24-month Genuine Parts guarantee.
Vehicle Compatibility
| Model | Chassis | Engine Variant | Model Years |
|---|---|---|---|
| 3 Series 330e/330i/330d (incl. xDrive) | G20 / G21 | 48-V mild-hybrid | 2019 → 2024 |
Technical Specifications
| Parameter | Value |
|---|---|
| Conductor | 35 mm² tinned Cu-ETP |
| Length | ~890 mm eyelet-to-eyelet |
| Terminals | M8 tinned-copper lugs + locking grommet |
| Rated Voltage | 60 V DC peak |
| Current Capacity | 250 A @10 s, 150 A continuous |
| Sheath Temp Range | −40 °C … +150 °C |
| Warranty | 24 months |
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Disconnect 12 V battery & pull 48 V service plug.
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Unbolt starter-generator eyelet (M8, 14 Nm) then release jump-start-post nut (M8, 19 Nm).
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Route new cable along OE clips; ensure no contact with sharp edges or moving parts.
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Torque both lugs to spec; re-engage service plug, connect battery, clear any IBS faults.
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