BMW E87 E90 E91 118i 318i N46 129HP ECU Kit DME 7565300 + CAS3 + Key Manual

Visual condition of the part

The product shows signs of use visible in the photos.

BMW E87 E90 E91 118i 318i N46 129HP ECU Kit DME + CAS3 + Key Manual is an original electronic control module designed to manage the operation of the powertrain in BMW models with the N46 engine and manual transmission. This ECU controller is responsible for precise fuel metering, ignition control, and cooperation with other vehicle systems, ensuring stable and predictable engine performance. Thanks to its factory design, it is a solution well-suited to the electrical installation and control architecture of these models.

Specifications and technical data

• SKU: 7565300-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7565300
• Substitutable numbers: 12147565300, 7565300, 12147565301, 7565301, 0261201160, 61356943830, 6943830
• Gearbox type: Manual
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Purpose and function of the engine controller

The BMW engine computer for the N46 unit acts as the central brain of the powertrain, analyzing signals from sensors and, based on this, controlling the operation of injectors, ignition coils, and actuators. A properly selected ECU module allows for maintaining factory engine performance parameters, idle smoothness, and correct throttle response.

The version designed for vehicles with a manual transmission works with software adapted to the characteristics of the manual gearbox, which is important for torque control strategies, fuel cut-off functions, and cooperation with safety systems. Using the correct type of ECU reduces the risk of communication errors in the vehicle network and facilitates adaptation after installation.

ECU type and integration with vehicle electronics

The presented module belongs to the Electronic control modules and controllers category, and its type is Engine Control Unit, which is a specialized controller responsible solely for engine operation. The ECU design is prepared for operation in high-temperature and vibration environments typical of the engine bay, while simultaneously ensuring stable communication with other controllers in the vehicle.

Thanks to the use of appropriate part numbers and interchangeable numbers, the module can be selected based on both OEM markings and hardware-software configuration. In practice, this means the possibility of matching the controller to a specific equipment version and car model year, while maintaining compatibility with the wiring harness and other system components.

Benefits of using an original BMW controller

Choosing an original BMW engine computer for E87, E90, and E91 models with the N46 unit allows for maintaining the consistency of the entire powertrain control system. Key advantages of this solution include:

• factory fitment to the vehicle's electrical and communication architecture,
• preservation of factory engine control maps,
• proper cooperation with the manual transmission,
• possibility of diagnostics using standard BMW service tools.

The product in Used condition is an attractive cost-effective alternative to new controllers, while maintaining the original hardware specification. In many cases, this allows for effectively solving engine performance issues, communication errors, or electronic damage without the need to invest in a completely new module.

Selection, installation, and ECU programming

For the engine computer to work correctly, it is crucial to match it to a specific vehicle based on the part number, interchangeable numbers, and engine/transmission configuration. In practice, it is often required to perform programming, coding, or synchronization procedures with the immobilizer, which is why installation should be entrusted to a workshop with experience in BMW electronics.

Before purchasing, it is recommended to verify compatibility via VIN and consult with a mechanic or automotive electrician to ensure that the selected ECU module corresponds to the equipment version used in the car. A correctly selected and configured controller allows for restoring full powertrain functionality, reducing errors in the diagnostic memory, and stabilizing engine operating parameters across the entire RPM range.

More about used electronics and related components

If you want to better understand how to safely choose used engine controllers and other electronic modules, how to check compatibility via VIN and OEM numbers, and what to pay attention to during installation, check out the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

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 controllers, engine management modules, or related electronic systems, check the available parts in the BMW electronic control modules and controllers category.