BMW 3 Series E90 E91 E92 LCI N47N Wiring Harness Engine Injector Module 8507799

The BMW 3 Series E90/E91/E92 LCI N47N Engine Injector Wiring Harness is an original electrical component designed for precise connection between the control module and the injectors. As part of the BMW Wires, Harnesses, and Connectors category, it ensures stable signal transmission and proper operation of the fuel system in modern BMW diesel engines. A used OEM component allows for a technically correct repair without the need for replacements with uncertain parameters.

Specifications and technical data

• SKU: rhd-8507799
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8507799
• Substitutable numbers: 12518507799, 8507799
• Category: Wiring Harnesses, Cables & Connectors

Application and Function in the N47N Engine System

This wiring harness is an electrical system component responsible for connecting the control module to the injectors in the N47N engine used in the facelifted (LCI) BMW 3 Series. It is responsible for:

• transmitting control signals to the common rail injectors,
• ensuring proper electrical supply to the actuators,
• maintaining stable operating parameters of the injection system under varying load conditions.

Thanks to the preserved factory routing geometry and original connectors, the harness allows for hassle-free installation in the engine bay without the need for electrical system modifications.

Construction, Connectors, and Compatibility

The offered harness belongs to the BMW Wires, Harnesses, and Connectors category, meaning it has been specifically designed for the electrical and mechanical requirements of the N47N unit. The construction includes:

• factory connectors matched to the injectors and control module,
• appropriately selected wire gauges for the injection system's current loads,
• insulation adapted for operation in the elevated temperature of the engine bay.

The original BMW solution minimizes the risk of contact issues, voltage drops, or control unit errors resulting from poor quality wiring.

Benefits of Using an Original BMW Harness

Using this injector wiring harness in the N47N engine offers a range of practical service and operational benefits:

• Full compatibility with the factory installation – no need for connector modifications, soldering, or fabricating wire sections.
• Stable operation of the injection system – correct transmission of control signals reduces the risk of misfires, uneven running, or diagnostic errors.
• Time savings in the workshop – plug & play installation in place of a damaged harness speeds up the repair process.
• Consistency with other installation components – the original wire routing and mounting points are maintained.

Condition, Origin, and Service Application

The harness is from a dismantled BMW vehicle and is offered as a used component, allowing for economical repair while retaining an OEM part. This solution is particularly beneficial in cases of:

• mechanical damage to wires or connectors (abrasion, breakage, contact corrosion),
• injector misfires due to unstable connections,
• post-accident repairs where the original engine bay installation has been compromised.

For workshops specializing in BMW service, the harness is a practical replacement part that restores correct communication between the control unit and injectors without compromising quality.

BMW Wires, Harnesses, and Connectors – Selecting the Right Components

If you need other BMW Wires, Harnesses, and Connectors to expand or repair the electrical system in your car, use the dedicated category: BMW Wires, Harnesses, and Connectors. There you will find a wide selection of original electrical system components tailored for various models of this brand.

For users interested in a broader approach to modifying and upgrading premium segment cars, including the use of used OEM parts, a helpful guide article might be: MINI John Cooper Works – What Sets It Apart and How to Enhance Your MINI?. This is a good source of inspiration on how to consciously select components when modernizing a vehicle.