BMW E39 E46 E60 E65 E83 330i 530i 730i 3.0i Petrol M54 Injector Fuel 1439800

BMW E39 E46 E60 E65 E83 330i 530i 730i 3.0i Petrol M54 Injector 1439800 is an original BMW petrol injector nozzle, designed for M54 3.0 litre engines. The component ensures precise fuel delivery, stable engine operation, and correct power characteristics across a wide range of loads.

Specifications and technical data

• SKU: 7546245
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7546245
• Substitutable numbers: 13537546245, 7546245, 13641439800, 1439800
• Fuel type: Petrol
• Category: Fuel Injectors

Purpose and Compatibility with M54 Engine

The presented injector nozzle has been designed to work with the M54 petrol engine used in BMW 3, 5, 7 Series and X3 models in their 3.0i versions. The OEM design guarantees proper fuel flow parameters, the correct spray pattern, and compatibility with the factory engine control unit.

The injector is a component of the petrol fuel system responsible for creating a homogeneous fuel-air mixture. This allows for maintaining:

• stable idle speed, without misfires,
• proper throttle response across the entire RPM range,
• controlled fuel consumption while maintaining factory performance.

Technical Characteristics of the Petrol Injector Nozzle

As a component of the Injector Nozzles category, this petrol injector operates in a high-pressure system where dose repeatability and the correct fuel spray pattern are crucial. The needle and nozzle design is adapted to the M54 engine's combustion chamber, allowing for the preservation of factory injection maps.

The injector works with petrol fuel, which means a different operating characteristic compared to solutions used in diesel engines. Appropriately selected coil electrical parameters and valve opening times enable precise dose control by the engine control unit, which translates to:

• maintaining correct mixture stoichiometry in closed-loop mode with the lambda sensor,
• efficient operation of the catalytic converter and exhaust gas purification system,
• reducing the risk of knocking under higher loads.

Benefits of Using an Original BMW Injector Nozzle

Using an original injector in an M54 engine allows for restoring the engine's factory operating parameters. Compared to low-quality aftermarket parts, the OEM component ensures:

• precise fit into the manifold and fuel rail,
• compatibility with factory control unit maps without the need for software modifications,
• repeatable fuel doses between individual cylinders, which reduces engine running differences.

This is particularly important in 3.0i units, where even fuel supply to all cylinders affects the smoothness of operation, flexibility, and durability of the engine mechanics.

Condition, Verification, and Service Application

The offered injector is a used component, making it an attractive service solution for users looking for OEM parts at a reasonable price. This type of component is often chosen for:

• diagnosing uneven engine operation and misfires on a specific cylinder,
• repairs to the petrol fuel system after detecting improper fuel atomization,
• gradual replacement of injectors in engines with higher mileage.

Before installation, a standard service procedure is recommended: leak testing, checking electrical parameters, and verifying operation on a diagnostic bench, in accordance with procedures used in workshops specializing in the BMW brand.

Technical Support and Related Materials

If you need more parts from the same group, check the available BMW injector nozzles to select complete sets for your engine. This allows for comprehensive fuel system servicing in one stage.

When diagnosing fuel system problems, it is worth expanding your knowledge of typical symptoms and testing procedures. A blog article describing injector faults in diesel engines, which discusses symptoms of wear and verification methods, may be helpful – you can find it here: diesel injector faults – symptoms, consequences, and diagnostics. Although it concerns diesel units, many diagnostic principles can be applied to analyzing the operation of petrol injectors.

Additionally, if you are interested in a broader perspective on the construction and operation of the fuel system, it is worth familiarizing yourself with the material: fuel system – injectors, pumps, and fuel tank: maintenance and repair, which describes component selection by OEM numbers, diagnostic basics, and principles of proper operation.