BMW 1 3 5 Series F10 F20 E90 LCI Wiring Harness Engine Glow Plug Module 7811163

BMW 1 3 5 Series F10 F20 E90 LCI Wiring Harness Engine Glow Plug Module is an original component from the Wires, harnesses and connectors group, designed for precise power supply to glow plugs in selected BMW models. It ensures a stable electrical connection between the control unit and the glow plugs, which translates into reliable diesel engine starting and proper operation of the preheating system. This is a solution for users looking for a factory-fitted harness of proven quality.

Specifications and technical data

• SKU: 7811163
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7811163
• Substitutable numbers: 12518583657, 8583657, 12517811163, 7811163
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function of the glow plug harness

The presented glow plug wiring harness has been designed specifically for the preheating system in BMW engines used in, among others, the F10, F20, and E90 LCI series. Its task is to safely and stably transmit current to the glow plugs, which is crucial for cold starts, smooth engine operation, and reducing smoke after starting the engine.

Thanks to its factory fitment to the specific electrical architecture of BMW, the harness allows for maintaining the correct operating parameters of the system, minimizing the risk of voltage drops, connector overheating, or controller errors related to the glow plug circuit.

Construction and design advantages

As an element from the Wires, harnesses and connectors group, the glow plug installation uses dedicated connectors that fit factory glow plugs and engine accessories. A properly selected wire cross-section and shielding in critical areas promote stable system operation even under increased current loads.

• Factory connector ends matched to the glow plug sockets and BMW engine installation.
• Wires routed in a way that limits mechanical stress and the risk of abrasion.
• Construction prepared for operation in the engine compartment, taking into account increased temperature and vibrations.

Such a solution facilitates installation, shortens service time, and reduces the risk of errors resulting from incorrect wiring connection.

Condition, fitment, and service application

The offered harness is in used condition, which allows for an economical replacement of a damaged installation while maintaining the original BMW specification. This is a practical solution in situations where the vehicle has starting problems, errors related to the glow plug circuit, or visible damage to wires and connectors.

Replacing the complete harness is often faster and more predictable than repairing individual wire sections, especially in modern units where access to glow plugs and accessories is limited. Using an original installation allows for maintaining factory wire routing and compatibility with existing engine accessories.

Benefits of using an original BMW harness

• Better fitment for a specific BMW model compared to universal solutions.
• Reduced risk of starting problems and controller errors related to the glow plug circuit.
• Consistency with the vehicle's factory electrical architecture, which facilitates diagnostics and future repairs.

For workshops and individual users, this means a more predictable service result and the ability to restore proper preheating system operation without interfering with the vehicle's original installation.

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, sensor harnesses, or engine installation connectors, check out the available parts in the BMW wires, harnesses and connectors category.

For users interested in a broader look at the operation of drivetrain components and the selection of used components, a useful supplement may be the guide: Second-hand differential – what is worth knowing about used differentials, sensors, and drivetrain systems.