BMW E90 E92 330d 335d M57N2 Engine Injector Module Wiring Harness Cable 7796081

BMW E90 E92 330d 335d M57N2 Engine Injector Module Wiring Harness Cable is an original electrical system component designed for precise operation of the injection module in the M57N2 unit. Thanks to its factory-fit design for specific 3 Series diesel models, it ensures a stable electrical connection and proper communication between the injectors and the engine control unit. This is a practical solution for users looking to restore the correct operation of the fuel system without interfering with the original wiring architecture.

Specifications and technical data

• SKU: rhd-7796081-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7796081
• Substitutable numbers: 7796081, 12517796081
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the engine system

The presented harness belongs to the Wires, harnesses, and connectors category and is used in the M57N2 engine installed in BMW E90 and E92 models in 330d and 335d versions. It is responsible for transmitting control signals and power between the control module and the injectors, which has a direct impact on engine performance, fuel dosage, and idle stability. Using a dedicated harness allows for maintaining the factory parameters of the injection system and reduces the risk of errors resulting from improper connections.

Construction and fit for BMW E90 / E92

The harness has been designed specifically for the engine bay geometry of E90 and E92 models with the M57N2 engine, ensuring that the cable routing is organized and the connectors align perfectly with the designated mounting points. Properly shaped branches and factory connectors facilitate installation and removal during service work, and also promote safe cable routing away from hot and moving parts. Such a fit reduces mechanical stress and minimizes the risk of insulation abrasion during operation.

Benefits of using an original harness

Using an original injector harness in the M57N2 engine ensures compatibility with the factory control system and engine performance parameters. This is particularly important in diesel engines, where signal quality and electrical connection stability affect fuel dosing precision, exhaust emissions, and injector durability. Choosing this component is beneficial both for repairs following wiring failures and for preventive replacement during major injection system service, when a consistent, factory-standard solution is required.

Component condition and service application

The offered harness is a salvaged part intended for reinstallation in BMW vehicles with the M57N2 engine that have experienced existing wiring damage or issues with injector communication. This type of component is often chosen by workshops specializing in BMW service as an economical, yet original-compliant alternative to new parts. With proper installation and inspection of the connector condition, the harness can effectively restore the correct operation of the injection system and facilitate further engine diagnostics.

Technical support and additional information

In case of injector operation issues in diesel engines, it is worth verifying the condition of the harness itself, connectors, and the control module, as electrical circuit interference can produce symptoms similar to mechanical injector damage. For users who want to better understand the symptoms and consequences of improper injection system operation, the following article will be helpful: Diesel injector faults – how to recognize them and the risks of neglecting them, which describes typical symptoms, possible causes, and diagnostic methods.

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 additional harnesses, signal cables, or module connectors, check the available parts in the BMW wires, harnesses, and connectors category.