BMW F10 F11 LCI M5 F06 F13 M6 S63N Cable Alternator Starter Base B+ 7843349

BMW F10 F11 LCI M5 F13 M6 S63N Alternator Starter Cable is an original electrical system component from the Cables, Harnesses, and Connectors category, designed for demanding BMW M series powertrains. It ensures a stable connection between the alternator and starter motor and the vehicle's electrical system, which translates to reliable power supply for electrical systems and proper operation of the starter system in sporty BMW models.

Specifications and technical data

• SKU: 7843349
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7843349
• Substitutable numbers: 7843349, 12427843349
• Category: Wiring Harnesses, Cables & Connectors

Cable Purpose and Function

The presented cable is a factory wiring component used in BMW F10, F11 LCI, M5, and F13 M6 models with the S63N engine. It is responsible for transferring electrical energy between the alternator, starter motor, and the rest of the electrical system, which is crucial for battery charging and reliable engine starting.

As part of the Cables, Harnesses, and Connectors group, this cable is designed with appropriate cross-section, temperature resistance, and current load capacity typical for powerful BMW M gasoline engines. Using an original component maintains compliance with the vehicle's factory specifications.

Construction and Technical Properties

The alternator-starter cable in this application is a reinforced component designed to operate in an engine bay with elevated temperatures. The insulating materials used and the appropriately selected conductor cross-section minimize voltage drops and energy losses, supporting stable operation of electronic systems.

Key features include:

• factory-fitted terminations matching the alternator and starter connectors in the S63N unit,
• resistance to vibrations typical of powerful BMW M V8 engines,
• construction compliant with the vehicle manufacturer's requirements.

This allows the cable to be used as a direct replacement for the original equipment part, without requiring any modifications to the electrical system.

Benefits of Using an Original BMW Cable

Using an original cable in BMW M5 F10/F11 LCI and M6 F13 cars offers a range of practical service and operational benefits:

• Compatibility with Factory Installation – matched length, routing, and connector types facilitate installation and minimize the risk of connection errors.
• Stable Electrical Parameters – the cable is designed for the specific current loads of the S63N engine, supporting proper charging and starting.
• Electrical System Safety – appropriate insulation and construction reduce the risk of overheating, chafing, or short circuits in the engine bay.

For owners of powerful BMW M models, choosing an original component from the Cables, Harnesses, and Connectors group is particularly important, as incorrectly selected wiring can lead to starting problems, unstable voltage, or damage to other electrical components.

Product Condition and Service Application

The offered cable is from an original BMW installation and is a used component, making it an attractive solution for users seeking OEM parts on a reasonable budget. This type of component is particularly useful for:

• repairs of the starter system in M5 and M6 models,
• resolving battery charging issues caused by damaged wiring,
• restoring the original electrical system configuration after previous modifications.

By maintaining its original geometry and mounting points, the cable can be integrated into the existing harness without altering the vehicle's structure, which is beneficial both technically and for future diagnostics.

More Cables and Technical Knowledge

If you need other components from the range of cables, harnesses, and connectors dedicated to BMW during the service or upgrade of your vehicle's electrical system, check out the available parts in the BMW Cables, Harnesses, and Connectors category.

For those who want to better understand how to select original used components for popular car models, our guide may be helpful – find more information in the article Best Used Car Parts – A Guide to the Most Popular Original Parts.