BMW F30 LCI 330e B48X Cell Module Connector 8618444 61278618444

BMW F30 LCI 330e B48X Battery Cable Harness Wire is a component from the Cables, Harnesses, and Connectors category, designed for the power system in the facelifted BMW 3 Series F30 model. A properly selected battery harness ensures a stable electrical connection, safe starting current flow, and correct operation with the vehicle's electrical system.

Specifications and technical data

• SKU: 8618444
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8618444
• Substitutable numbers: 61278618444, 8618444, EM
• Category: Wiring Harnesses, Cables & Connectors

Application and Compatibility

The presented battery cable is dedicated to the electrical system of the BMW F30 LCI in the 330e version with the B48X unit, where it is responsible for connecting the battery to the rest of the installation. Thanks to a design compliant with factory solutions, proper cable cross-sections, mounting points, and harness routing geometry in the engine bay and body are maintained.

Proper fitting to a specific model version reduces the risk of mechanical stress, insulation abrasion, or incorrect cable routing, which is important for both safety and the durability of the entire power system.

Construction and Performance Parameters

The battery harness in this BMW model is designed as a high-current capacity component, adapted for operation in demanding thermal and mechanical conditions. The cable insulation used is resistant to elevated temperatures in the engine bay and to typical operational factors such as moisture or road debris.

Key performance features of this component include:

• factory cable terminations enabling secure connection to terminals and ground points,
• appropriately selected harness length and shape, facilitating cable routing along the original path,
• design adapted to the current loads typical for the B48X unit and the 330e hybrid system.

Thanks to this, the cable operates stably during starting, battery charging, and operation of onboard systems.

Condition, Safety, and Benefits of Installation

This component comes from the group of used BMW parts, allowing for an economical repair of the power system while maintaining the original manufacturer's specifications. Choosing a dismantled harness instead of a replacement with uncertain parameters helps maintain correct voltage drops, proper cable resistance, and compatibility with factory electrical protections.

Replacing the battery cable is particularly recommended in situations where:

• mechanical damage to the insulation or terminals is visible,
• starting problems occur despite a functional battery,
• excessive corrosion or overheating appears on the connectors.

A correctly selected harness reduces the risk of voltage drops, uncontrolled power interruptions, and local overheating, which translates to stable operation of the vehicle's electronic systems.

Why Choose BMW Cables, Harnesses, and Connectors

Original BMW cables, harnesses, and connectors are designed for the specific electrical architecture of the vehicle, ensuring proper conductivity, interference resistance, and compatibility with control modules. For hybrid models like the 330e, this is particularly important for the correct interaction between the combustion engine, electric system, and energy management systems.

If you need other cables from this group for your car, check the available BMW cables, harnesses, and connectors to select components tailored to your specific engine version and equipment.

Practical Usage Tips

When installing the battery harness, it is advisable to pay attention to thoroughly cleaning the ground points and terminals, applying the correct tightening torque to the connections, and routing the cable according to factory brackets. This helps avoid loose connections, excessive vibrations, and accidental contact with moving or hot components.

To better plan the servicing of the electrical system and other components, you can use practical advice in the article TOP 10 Most Frequently Replaced Parts in Your Car, which helps you optimally care for your car in terms of cost and durability.