BMW E91 325i N52 Engine Control Unit ECU 218HP Automatic 2.5 Petrol 7555361 KIT

BMW E91 325i N52 Engine Control Unit ECU 218HP Automatic 2.5 Petrol KIT is a specialized component from the Electronic control modules and controllers group, designed for petrol units paired with an automatic transmission. This used control set provides a precise solution for BMW owners who need a verified ECU module matched to a specific engine and drivetrain configuration.

Specifications and technical data

• SKU: 7555361-11
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7555361
• Substitutable numbers: 12147577970, 7577970, 12147555361, 7555361, 61356943771, 6943771, 5WK90078
• Fuel type: Petrol
• Gearbox type: Automatic
• Part type: Engine Control Unit (ECU)
• Category: ECUs & Computer Modules

Controller purpose and compatibility

The presented controller is dedicated to the N52 petrol engine with 218 HP in the BMW E91 325i model equipped with an automatic transmission. It is responsible for advanced management of the powertrain, including fuel injection control, ignition, and cooperation with the automatic gear shifting system, which is crucial for driving smoothness and engine performance stability. By using an original module from the same family of controllers, the software consistency and electrical architecture of the vehicle are maintained, which facilitates adaptation in the vehicle and subsequent diagnostics. Selecting a controller compatible with the specific engine and automatic transmission version minimizes the risk of communication issues within the CAN network and reduces the need for additional modifications.

Technical characteristics and role in the drivetrain

As an element from the Electronic control modules and controllers category, this ECU acts as the central unit managing the operation of the petrol engine. Based on signals from sensors and cooperating modules, the controller calculates optimal fuel doses, ignition timing, and parameters for cooperation with the automatic transmission, which translates into the refinement of the N52 unit and predictable throttle response. A properly selected engine controller in an automatic configuration supports:

• stable idle speed under various operating conditions,
• smooth gear shifting in the automatic transmission,
• proper cooperation with the vehicle's onboard systems,
• maintenance of factory performance parameters for the 2.5 petrol unit.

Benefits of using a used BMW controller

A used engine controller for the BMW E91 325i N52 is a solution that allows you to reduce repair costs while maintaining the original electronics architecture. In many cases, it is an effective alternative to new modules, especially when you want to maintain compatibility with the factory vehicle configuration. An original module from the same family of controllers increases the chance of seamless adaptation in the vehicle after proper programming and coding. If you are considering installing a used ECU, it is worth checking out practical tips regarding the selection and verification of such components – you will find them in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, which discusses key aspects of purchasing and installing used automotive electronics.

Professional use in service and repairs

This controller will work well both in professional workshops specializing in the BMW brand and for advanced users servicing their own cars. Thanks to its matching to the petrol engine and automatic transmission, it can be used for:

• replacing a damaged ECU after an electrical or software failure,
• restoring a functional engine control configuration after modifications,
• diagnosing engine operation problems by swapping in a different module. Consistency with the factory BMW control system facilitates integration with the existing installation and subsequent diagnostic work using specialized testers.

Expanding the control system in BMW

If you are planning a comprehensive repair or modernization of the engine area in your BMW and need other components from the same group, such as additional control modules, ECU units, or related auxiliary controllers, check out the available parts in the BMW electronic control modules and controllers category.