BMW E90 E91 Petrol N52 Wiring Loom Harness Engine Automatic Gearbox

BMW E90 E91 Petrol N52 Wiring Loom Harness Engine Automatic Gearbox is an original wiring set designed for models with the N52 unit and an automatic transmission. The component belongs to the Wires, harnesses and connectors group, ensuring proper electrical connection between the engine, accessories, and transmission control. It is a practical solution for users looking for factory-spec wiring for professional repairs or installation conversions.

Specifications and technical data

• SKU: 7571952
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7571952
• Substitutable numbers: 12517563101, 7563101, 12517571952, 7571952, 12517545232, 7545232, 12517566979, 7566979
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Wiring Harnesses, Cables & Connectors

Purpose and compatibility

The presented BMW 3 Series E90/E91 engine wiring harness has been designed for N52 petrol units working with an automatic transmission. The harness design accounts for the specific layout of accessories in the engine bay, the placement of sensors, and control connectors, which allows for maintaining the factory routing logic of the wires.

The component is dedicated to BMW vehicles, ensuring compatibility with original controllers, modules, and connectors used in this generation of the 3 Series. This is particularly important when repairing installations after mechanical or thermal damage, as well as during engine replacement within the same family of units.

Construction and function in the drivetrain

The harness belongs to the Wires, harnesses and connectors category, responsible for distributing signals and power between key drivetrain components. It includes sections routed in the area of the cylinder head, engine block, accessories, and the interface with the automatic transmission control.

The placement of the connectors has been adapted to the N52 engine architecture, which facilitates the correct connection of sensors, ignition coils, mixture control elements, and components cooperating with the automatic transmission. This enables stable communication between the engine control unit and other vehicle modules.

Application in petrol vehicles with automatic transmission

The harness is intended for petrol-powered cars equipped with an automatic transmission. Such a configuration requires appropriately designed wiring that accounts for additional signals related to transmission operation, driving modes, and drivetrain safety features.

Thanks to being matched to the specific fuel type and transmission type, the harness allows for maintaining correct engine operating parameters, smooth gear shifting, and proper cooperation with safety and comfort systems.

Characteristics of the used component

The offered item is a used part, sourced from dismantling, which is a cost-effective solution for users looking for original wiring on a reasonable budget. This type of component allows for maintaining the factory specification of the electrical installation without the need to use replacements with uncertain connector geometry.

The harness will prove useful both for standard replacement of a damaged wire and for more extensive service work within the engine bay, where maintaining compliance with the manufacturer's original design is crucial.

Expanding the BMW wiring system

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 harnesses, wire sections, or service connectors, check the available parts in the BMW wires, harnesses and connectors category.

For users interested in comparing technical solutions used in different brands and engine versions, materials discussing the construction of power units and accompanying systems may be useful – for example, the article Audi RS vs other models – what is hidden under the hood and chassis? allows for a better understanding of the differences in manufacturers' approaches to designing the drive and accessories.