BMW E87 E90 N46 120i 320i 150HP Engine Unit ECU kit DME 7565300 CAS3 Key Manual

BMW E87 E90 N46 120i 320i 150HP Engine Unit ECU kit DME CAS3 Key Manual is a complete, used engine control kit designed for 150 HP N46 petrol units with a manual transmission. The offered module belongs to the Electronic control modules and controllers category, ensuring precise engine management and stable communication with the vehicle's electrical system. This is a solution for users who expect proven OEM electronics instead of unreliable replacements.

Specifications and technical data

• SKU: 7565300-6
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7565300
• Substitutable numbers: 7565300, 12147565300, 7565301, 12147565301, 7561891, 12147561891, 7550867, 12147550867, 7550857, 12147550857, 7568658, 12147568658, 7550869, 12147550869, 7568646, 12147568646, 4834203, 12144834203, 0261201160, 6943814, 61356943814, 6943797, 61356943797
• Fuel type: Petrol
• Gearbox type: Manual
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Purpose and function of the ECU DME kit

The presented ECU DME kit is designed to work with the N46 petrol engine in BMW 1 Series E87 and 3 Series E90 models in 120i and 320i versions with 150 HP. As an Engine Control Unit, it is responsible for controlling key engine operating parameters, such as fuel dosage, ignition timing, and auxiliary equipment operation, adjusting them to current driving conditions.

The module is configured for a manual transmission, which is crucial for proper interaction with the drivetrain and safety systems. This ensures correct communication with other controllers in the vehicle, and the response to changes in engine load and speed remains consistent with factory specifications.

Benefits of using an original BMW ECU

Choosing an original controller from the Electronic control modules and controllers category allows you to maintain the factory engine performance characteristics without the risk of incorrect calibration typical of random replacements. Using an ECU dedicated to the N46 petrol engine enables:

• maintaining stable idle speed and smooth acceleration,
• proper cooperation with sensors and actuators in the engine bay,
• correct support for OBD diagnostic functions,
• preservation of factory ignition and injection maps adjusted for the 150 HP unit.

For the user, this means predictable vehicle behavior, easier service diagnostics, and a reduction in the risk of problems with starting, jerking, or uneven engine operation.

Technical characteristics and compatibility

The offered ECU DME kit is intended for an engine powered by petrol, which is of key importance when selecting a controller – it differs in construction and software from solutions used in diesel units. Compatibility with a manual transmission ensures the proper operation of functions related to power transmission, such as gear shift response and cooperation with driver assistance systems.

As an OEM BMW component, the kit is prepared for integration with the vehicle's factory electrical system, which facilitates installation and reduces the need for wiring modifications. The presence of dedicated part numbers and interchangeable numbers (visible in the technical specification) allows for precise verification of compatibility by VIN or OEM numbers, which is particularly important when selecting used electronics.

Condition, application, and best installation practices

The product is used, which in the case of BMW engine controllers often represents a reasonable compromise between cost and functionality, provided it is correctly selected and installed. Before installation, it is recommended to verify compatibility with the specific vehicle equipment version and prepare for potential adaptation or programming procedures at a specialized service center.

To maximize the potential of the offered ECU DME kit, it is worth:

• checking compatibility according to the OEM and interchangeable numbers from the specification,
• planning the installation at a workshop with experience in BMW electronics,
• performing computer diagnostics after installation and clearing any errors stored in the controller's memory.

Such an approach minimizes the risk of operational problems and allows for restoring the proper operation of the engine unit after the failure of the previous module.

Expert support and selecting used electronics

If you want to better understand how to safely select used engine controllers, ECU modules, and sensors, how to check hardware and software compatibility, and what to pay attention to during installation, use our guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. This is a practical source of knowledge that will help reduce the risk of a bad purchase and facilitate cooperation with the workshop.

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 controllers, management modules, or other ECU units, check the available parts in the BMW Electronic control modules and controllers category.