BMW G20 LCI Starter Motor Positive Battery Cable B48B20A Petrol 8485064G20

BMW G20 LCI Starter Plus Cable Petrol B48B20A is an original starter system component designed for petrol engines, engineered for stable starter power supply. Thanks to its factory geometry and appropriately selected cable cross-section, it ensures reliable starting current conduction and proper cooperation with the vehicle's electrical system. This is a practical solution for users who want to restore the correct parameters of the starter system in their BMW 3 Series G20 LCI with the B48B20A engine.

Specifications and technical data

• SKU: 8485064
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8485064
• Substitutable numbers: 8485064, 12428485064
• Fuel type: Petrol
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and Function of the Starter Plus Cable

The starter plus cable in the BMW G20 LCI is responsible for transferring high starting current from the vehicle's electrical system to the starter of the B48B20A petrol engine. A correctly selected and functional cable minimizes voltage drops, reduces the risk of connector overheating, and supports stable engine unit startup under various operating conditions.

In cases of symptoms such as slower starter cranking, unstable voltage during startup, or signs of overheating on the connectors, replacing the plus cable is one of the basic diagnostic and repair steps for the starter system.

Construction and Fit for BMW G20 LCI

The offered plus cable has been specifically designed for use in the BMW G20 LCI with the B48B20A petrol engine. This means its length, routing shape, and terminations are adapted to the factory harness layout in the engine bay. This ensures an organized installation, maintaining original mounting points and cable routing.

Key construction features of the starter plus cable in this model include:

• dedicated terminations for secure connection to the starter and the vehicle's system,
• cable cross-section selected for the current loads typical for a petrol engine,
• insulation adapted for operation at elevated temperatures in the engine bay.

Benefits of Using an Original BMW Cable

Using a starter plus cable from BMW offers a range of practical operational benefits. Primarily, compatibility with the factory electrical system is maintained, which reduces the risk of problems with matching terminations, length, or cable routing. The original geometry also facilitates proper cable placement away from high-temperature components and moving parts of the engine accessories.

Choosing a used, original starter plus cable is often a sensible solution when the existing component has suffered mechanical damage, overheating, or corrosion on the connectors. This allows for the restoration of correct starting parameters without the need for aftermarket replacements with uncertain fit.

Condition, Verification, and Application in Petrol Systems

This part is from a dismantled vehicle and is intended for reinstallation in a petrol-powered vehicle. The starter plus cable in such a system operates under specific conditions of current load and temperature, so it is important to maintain the appropriate quality of insulation and the reliability of electrical connections. Before installation, a standard check of the connectors' condition, the cleanliness of contact surfaces, and the correct routing of the cable relative to other engine accessory components is recommended.

A correctly selected starter plus cable supports the stable operation of the entire starter system, which directly impacts the comfort of daily vehicle use and reduces the load on the battery and starter.

Related Components and Powertrain Development

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other parts from the same group, such as additional power cables, starter harnesses, or engine bay electrical accessories, check the available parts in the Other BMW category.

When working on the powertrain and starter system, it is also worth expanding your knowledge about the construction differences between sports and standard vehicle versions. An article on our blog can be helpful in this regard: Audi RS vs. Other Models – What Lies Under the Hood and Chassis?, which discusses, among other things, the impact of engine, brake, and chassis modifications on the selection of appropriate components.