Battery Cable BMW E82 E90 E91 E92 N54 Alternator Starter Base B Cable 7556846

Battery Cable BMW E82 E90 E91 E92 N54 Alternator Starter Base B Cable is an original BMW electrical system component designed to connect the alternator to the starter in N54 engines. It ensures stable conduction of starting current and charging, which translates into reliable engine starts and proper operation of the charging system in daily use.

Specifications and technical data

• SKU: 7556846
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7556846
• Substitutable numbers: 7556846, 12427556846
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function of the cable

The presented cable is a component from the Cables, harnesses and connectors group, responsible for connecting the starter circuit to the alternator in BMW vehicles with the N54 engine, such as the E82, E90, and E91 series. The appropriate conductor diameter and factory-made connector design allow for the safe transmission of high starting currents and battery charging current.

Using an original cable in this area reduces the risk of voltage drops, overheating of the installation, and engine starting problems, which is particularly important in turbocharged units that are sensitive to electrical power quality.

Construction and technical features

The BMW alternator-to-starter cable has been designed as a high-current installation component, with factory-molded terminals matched to the mounting points in the N54 engine. The insulation used is resistant to high temperatures and typical mechanical loads occurring in the engine compartment, which promotes long-term, stable operation.

The arrangement of branches and the length of the cable are adapted to the original routing in E82, E90, and E91 bodies, which facilitates installation and allows for maintaining the factory harness path. This reduces the risk of chafing, excessive tension, and accidental contact with moving or hot engine components.

Condition, selection, and installation

The item is offered in Used condition, meaning it has been removed from a vehicle while maintaining functionality suitable for further use. For proper cable selection, it is worth verifying compatibility with the specific N54 engine version and body type using the manufacturer's markings and reference numbers available in the technical specification.

It is recommended to entrust the installation of the alternator-to-starter cable to a workshop experienced with BMW electrical systems. Proper tightening of the connectors, correct harness routing, and inspection of ground points help avoid problems with starting, unstable charging, or local overheating of connections.

Benefits of using an original BMW cable

• Factory fitment for the N54 unit and E82, E90, E91 bodies.
• Stable conduction of starting current and battery charging.
• Insulation properly selected for conditions in the engine compartment.
• Reduction of the risk of voltage drops and engine starting problems.
• Easier installation thanks to the original cable geometry.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as power cables, engine harnesses, or high-current connectors, check the available parts in the BMW cables, harnesses and connectors category.

For drivers considering the use of aftermarket components in other brands, practical tips on selecting and installing used parts may be helpful – you can find them in the article Volkswagen – solidity and reliability. Why are used VW parts a reasonable choice?, which discusses, among other things, issues of compatibility, condition verification, and the cost-effectiveness of purchasing used elements.