BMW E87 E90 E91 120i 320i N46 150HP Engine ECU Kit DME 7565300 CAS3 Key Manual

BMW E87 E90 E91 120i 320i N46 150HP Engine ECU Kit DME CAS3 Key Manual is an original electronic control module designed for N46 petrol engines in 1 Series and 3 Series models with a manual transmission. This item from the Electronic control modules and controllers category is responsible for precise engine management, ensuring stable parameters and proper cooperation with other vehicle systems. This used controller is a solution that allows for a technically correct repair of the engine control system while maintaining factory operating logic.

Specifications and technical data

• SKU: 7565300-19
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7565300
• Substitutable numbers: 12147565301, 7565301, 12147565300, 7565300, 61356943834, 6943834, 0261201160
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the controller

The engine computer in the version dedicated to N46 units in BMW 1 Series and 3 Series models is responsible for coordinating the fuel injection system, ignition, and cooperation with the manual transmission. As a central control element, it collects signals from sensors, processes them according to maps saved by the manufacturer, and sends appropriate commands to the actuators. This makes it possible to maintain the correct engine performance characteristics, consistent with the assumptions of BMW engineers.

A properly selected controller for a specific drivetrain configuration is crucial for:

• stable operation of the petrol unit across the full load range,
• proper cooperation with the manual transmission,
• maintaining factory performance parameters and refinement,
• correct communication with other electronic modules in the vehicle.

Benefits of using an original BMW module

The original BMW engine computer ensures compatibility with the vehicle's electrical architecture and the software intended for a given model version. Using a module from the same family allows for configuration consistency, which facilitates adaptation and diagnostics using factory service tools. This solution is particularly beneficial for repairs where the priority is to restore factory operating parameters rather than modifying them.

For workshops and users, this means:

• easier identification and configuration during programming,
• preservation of safety and comfort system logic,
• the ability to use standard BMW service procedures,
• reduced risk of electrical compatibility issues.

Application in vehicles with a petrol engine and manual transmission

The presented controller is intended for configurations equipped with a petrol engine and a manual transmission. Such a combination requires appropriately prepared control maps and drivetrain cooperation logic. Using a module matched to this specification allows for maintaining proper throttle response, correct torque management, and predictable vehicle behavior under various operating conditions.

In practice, this translates into:

• consistent drivetrain operation across the entire rev range,
• correct engine response to gear changes,
• maintaining the driving characteristics typical of BMW models with the N46 unit.

Characteristics of the used product

As a used item, the engine computer is an economical alternative to a new module while maintaining the original design and purpose. This type of solution is often chosen for repairs of daily-driven vehicles, where reasonable cost is important while maintaining proper functionality. The used OEM controller allows for a technically correct rebuild of the control system without the need to resort to replacements of uncertain compatibility.

Before installation, it is recommended to perform standard workshop procedures, such as verifying compatibility with the vehicle and preparing for potential programming or adaptation in accordance with BMW procedures.

BMW electronic control modules and controllers – expansion and repairs

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

More about the role of original controllers and used parts

For premium brands such as BMW or Audi, maintaining the driving character and predictable operation of electronic systems largely depends on using the appropriate control modules. If you are interested in how original components affect vehicle behavior and why it is worth choosing proven parts, read the article Audi and pure emotion. How do used parts help maintain the brand's DNA?.

If you want to better understand the specifics of the second-hand parts market and dispel doubts regarding their use in repairs, the material Used car parts: Myths and facts you need to know, which discusses the most common concerns related to used components, may also be helpful.