BMW 1 3 Series E87 E90 Petrol N52 Wiring Loom Harness Engine Gearbox Automatic

BMW 1 3 Series E87 E90 Petrol N52 Wiring Loom Harness Engine Gearbox Automatic for petrol units with an automatic transmission is a factory-made electrical installation component, designed for the precise connection of sensors, engine accessories, and the automatic gearbox. By maintaining the original architecture of wires and connectors, it ensures stable communication between control units and drivetrain components, which translates into the proper operation of the powertrain. This solution is particularly useful for professional repairs or installation conversions in BMW 1 and 3 Series models.

Specifications and technical data

• SKU: rhd-7572404
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7572413
• Substitutable numbers: 12517572413, 7572413, 12517572404, 7572404, AS
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the vehicle

The offered BMW 1 3 Series E87 E90 Petrol N52 Wiring Loom Harness Engine Gearbox Automatic has been designed for petrol units where precise control of engine and transmission operation is crucial. This component is responsible for:

• transmitting signals between engine sensors and the control unit,
• electrical support for the automatic transmission,
• power supply and communication for accessories located in the engine bay,
• maintaining a consistent electrical architecture in accordance with BMW standards.

By maintaining the original wiring layout, the harness allows for the reconstruction of factory connection logic, which is essential during post-collision repairs or when replacing the engine or gearbox.

Construction and technical advantages

The harness belongs to the Wires, looms, and connectors group, meaning it includes a complete set of wires with properly selected connectors and mounting points. The design provides for:

• dedicated connectors for petrol engine accessories,
• outlets for the automatic transmission,
• factory mounting points in the engine bay and near the gearbox,
• wire routing consistent with the original path in the BMW E87 / E90.

Such a solution facilitates installation and reduces the risk of installation errors, while simultaneously supporting proper computer diagnostics, as all signals are routed according to the manufacturer's specifications.

Application in petrol units with automatic transmission

The harness has been prepared for use with petrol engines and automatic transmissions, which is significant both when replacing a damaged installation and during complex powertrain repairs. In practice, this means that it:

• supports specific control signals for the automatic transmission,
• is adapted to the operating parameters of petrol units,
• allows for maintaining consistency with factory control unit software.

Thanks to this, it constitutes a coherent element of the electrical system, minimizing the risk of communication problems between control modules and accessories.

Condition and benefits of using an original part

The offered harness is a used item, which, in the case of original BMW components, allows for maintaining high installation compatibility while optimizing repair costs. Choosing a factory harness from the same model family:

• facilitates plug-in installation without modifying the wiring,
• reduces the risk of incompatibility with existing control units,
• ensures predictable behavior of the electrical system after repair.

This solution is especially recommended for workshops specializing in the BMW brand and users who expect compliance with factory installation standards.

Support with selection and additional materials

When selecting a harness for a specific BMW 1 or 3 Series configuration, it is worth paying attention to the manufacturer's markings, fuel type, and transmission type to ensure full compatibility with the existing installation. In case of doubt, comparing the connector layout and wire routing with the removed harness may be helpful.

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 additional looms, signal wires, or service connectors, check the available parts in the BMW Wires, looms, and connectors category.

For a better understanding of the power supply system and diagnostics of components working with the engine's electrical installation, you can use the advice contained in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses practical aspects of operation and component selection.