Charging Module BMW i3 I01 Rex Hybrid Comfort Battery Control Unit KLE 5A12D42

Description

Charging Module BMW i3 I01 Rex Hybrid Comfort Battery Control Unit KLE is a specialized control module for the charging system and comfort battery management in the hybrid BMW i3 I01 with a range extender. As a component from the Electronic control modules and controllers group, it is responsible for precise control of system operation, communication with other controllers, and the stability of charging parameters. Using an original BMW component allows for maintaining the integrity of the electrical system and the proper operation of the high and low voltage circuits.

Specifications and technical data

• SKU: 5A12D42
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 5A12D42
• Substitutable numbers: 61445A12D42, 5A12D42, KZ
• Location on the vehicle: Rear
• Category: ECUs & Computer Modules

Purpose and function of the BMW i3 I01 Rex charging module

The presented controller is designed for the charging system and comfort battery management in the BMW i3 I01 with a Rex combustion engine. The module integrates with the vehicle’s architecture, supervising the charging process, cooperation with the onboard electrical system, and data exchange with other controllers responsible for the hybrid drive. This ensures that the vehicle maintains a stable power supply for comfort consumers and correct system diagnostics.

Its location in the rear of the vehicle facilitates protection against external conditions and shortens the wiring path to key components of the energy system. This BMW design solution reduces transmission losses and improves the reliability of the entire system.

Construction, integration, and communication in the BMW installation

The module belongs to the group of controllers responsible for advanced energy management in an electric-hybrid vehicle. Its design is optimized for:

• stable cooperation with the body and drive controller network,
• handling multi-level electrical protections,
• precise control of comfort battery charging parameters,
• onboard diagnostics support and communication with service testers.

Its original BMW origin promotes compatibility with factory software and installation diagrams. As a result, the module can be integrated into the existing controller network without the need for modifying harnesses or using substitute solutions.

Benefits of using an original control module

Using an original charging and comfort battery control module in the BMW i3 I01 Rex allows for maintaining the factory operating parameters of the energy system. Key advantages include:

• consistency with the factory electrical architecture – no need for installation adaptation,
• maintaining correct communication with other vehicle controllers,
• the ability to perform full diagnostics using standard BMW service tools,
• reducing the risk of errors, fault messages, and problems with comfort battery charging.

The used OEM component is a good solution for repairs where compliance with factory specifications and control of service costs are important, while maintaining high build quality.

Condition, installation, and selection of the correct controller

The module comes from disassembly and is offered as a used part, which allows for an economical repair of the charging system in the BMW i3 I01 Rex. Before installation, a standard service procedure is recommended: verification of the installation, inspection of connectors, and then adaptation or coding in accordance with the vehicle manufacturer’s guidelines. A correctly selected controller allows for restoring stable system operation without interfering with the car’s construction.

When selecting, it is worth paying attention to compatibility with the body version, drive type, and equipment configuration to ensure full cooperation with the existing controller network and the installation in the rear of the vehicle.

Related modules and further knowledge

If you are planning a comprehensive repair or upgrade of the control electronics area in your BMW and need other elements from the same group, such as body controllers, comfort modules, or energy management units, check the available parts in the BMW Electronic control modules and controllers category.

For a comparison of other manufacturers’ approaches to original controllers and multimedia modules, you can read an article describing how to maintain the brand’s character using parts from disassembly: Audi and emotions in their purest form – how used modules and components help maintain the brand’s DNA.