Engine Wiring BMW E60 E61 E63 N62 Injector Ignition Loom Harness Cable 7549857

Engine Wiring BMW E60 E61 E63 N62 Injector Ignition Loom Harness Cable is an original component from the Cables, harnesses and connectors group, designed for BMW N62 petrol engines. Engineered as factory-spec wiring, it ensures proper power supply and control for the injectors and ignition system, resulting in stable engine operation and correct communication with the vehicle's electronics.

Specifications and technical data

• SKU: rhd-7549857
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7549857
• Substitutable numbers: 7549857, 12517549857
• Fuel type: Petrol
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the engine system

This harness is dedicated to N62 petrol engines installed in BMW 5 Series E60/E61 and 6 Series E63 models. It is responsible for connecting fuel injectors and ignition coils to the main engine harness, enabling precise control of fuel dosage and spark generation. This allows the injection-ignition system to maintain proper synchronization, ensuring the engine runs smoothly across the entire RPM range.

The factory design of the harness ensures a perfect fit with original mounting points and cable routing in the engine bay, which reduces the risk of insulation abrasion, unwanted tension, and electrical interference. This is particularly important in V8 engines, where the component density is high and proper cable routing is essential for the reliability of the entire system.

Benefits of using an original harness

Using an original injector and ignition harness for the N62 engine allows you to maintain the operating parameters specified by the vehicle manufacturer. The correct wire gauge, proper selection of connectors, and shielding of control circuits minimize voltage drops and signal interference. In practice, this translates into:

• stable engine starting under various operating conditions,
• proper operation of injectors and ignition coils,
• reduced risk of engine control unit errors related to circuit interruptions,
• easier diagnostics in the event of potential installation faults.

For users planning to service the injection-ignition system in N62 petrol units, using a factory harness is a safe solution in terms of electrical and mechanical integrity, while also being cost-effective compared to makeshift repairs.

Condition, installation, and service aspects

The item is a salvaged part intended for reinstallation in compatible BMW models. A used harness allows for an economical repair of the engine installation, especially in cases of mechanical wire damage, melted insulation, or issues with injector and coil connectors. Thanks to the preservation of the original cable geometry, installation is straightforward, maintaining all factory mounting points.

Before installation, it is recommended to perform a standard inspection of the insulation and connector sockets, as well as cleaning the contacts to ensure the best possible electrical connection. A correctly installed harness supports smooth engine operation, reduces the risk of ignition misfires, and facilitates future maintenance, including computer diagnostics.

Technical support and additional materials

When planning major work on the power unit, it is worth familiarizing yourself with best practices for handling used engine components. The following guide may be helpful: Buying a used engine: 5 things you must check before installation, which discusses the key stages of verification and preparation of the engine for operation.

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, cable sections, or engine installation connectors, check out the available parts in the BMW cables, harnesses and connectors category.