BMW 1 3 E87 E90 E91 M47N2 Engine Injector Module Wiring Harness Cable 7804722

BMW 1 3 E87 E90 E91 M47N2 Engine Injector Module Wiring Harness Cable is an original electrical system component designed for precise control of injector operation in the M47N2 diesel engine. As part of the Wires, harnesses and connectors group, it ensures a stable connection between the control module and the injectors, which translates into proper engine operation and easier diagnostics. This used OEM BMW component is a sensible choice for professional repairs or restoring the factory installation configuration.

Specifications and technical data

• SKU: rhd-7804722
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7804722
• Substitutable numbers: 12517804722, 7804722, KZ
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the M47N2 engine system

This wiring harness is an electrical system component responsible for transmitting control signals between the control module and the injectors in the M47N2 engine used in BMW 1 Series E87 and 3 Series E90 / E91 models. The appropriate quality of wires and connectors is crucial for:

• stable fuel dose control in each cylinder,
• maintaining smooth engine operation,
• reducing electrical interference within the injection system,
• facilitating the diagnosis of injection-related faults.

Thanks to its factory fitment for a specific engine type, the harness allows for maintaining the original wire routing and correct positioning of connectors in the engine bay.

Construction, connectors and fitment

The harness belongs to the Wires, harnesses and connectors group, which means it has been designed to operate in the demanding environment of the engine bay. It includes wires with an appropriately selected cross-section and connectors adapted to work with the injectors and the control module in the M47N2 engine. The OEM design ensures:

• factory wire lengths matched to the injection system,
• connectors compatible with the original injectors and module,
• mounting points and harness routing as intended by the manufacturer.

Such fitment reduces the risk of stress on the connectors, accidental insulation abrasion, and assembly problems in the tight space of the engine bay.

Benefits of using an original BMW wiring harness

Using an original injector wiring harness in the M47N2 engine allows for maintaining the consistency of the entire injection system. Compared to universal solutions or modifications, the factory component offers:

• a secure fit for a specific BMW model without the need for installation modifications,
• preservation of the original wire routing geometry,
• easier disassembly and reassembly during future repairs,
• lower risk of electrical contact issues at the connectors.

For workshops specializing in BMW service and users who care about compliance with factory specifications, this is a practical solution when replacing a damaged or degraded harness.

Condition, verification and practical application

The item is offered as a used BMW part, which allows for economical repair while maintaining the original design. Before installation, a standard visual inspection of the insulation, connectors, and mounting points is recommended, as well as matching it to the specific M47N2 engine configuration in the given vehicle. A properly selected harness helps eliminate typical problems with injector misfiring, controller errors, or unstable engine operation.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as power cables, control module harnesses, or sensor connectors, check the available parts in the BMW wires, harnesses and connectors category.

Additional information and technical support

When selecting electrical system components for BMW diesel engines, it is worth considering the specifics of individual units and structural differences between generations. If you are interested in a broader comparison of popular BMW diesel engines in terms of performance, reliability, and aftermarket parts availability, the following article may be helpful: BMW N47 vs M57 / M57N / M57N2 – a ranking of legendary diesels. This will make it easier for you to plan the long-term operation and service strategy for your car.