BMW 1 3 E87 E90 N45 116i 316i Petrol ECU Kit DME 7557809 + CAS 2 + Key Manual

BMW 1 3 E87 E90 N45 116i 316i Petrol ECU Kit DME + CAS 2 + Key Manual is a specialized engine control unit from the Electronic control modules and controllers category, designed for N45 petrol engines paired with a manual transmission. This solution allows for restoring the proper operation of the drivetrain while maintaining factory control logic and full integration with the BMW vehicle's electrical system.

Specifications and technical data

• SKU: 7557809-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7557809
• Substitutable numbers: 12147557809, 7557809, 12142461574, 2461574, 0261209085, 61356943791, 6943791, KZ
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the DME controller

The presented DME computer is the central element managing engine operation in BMW 1 Series E87 and 3 Series E90 models with the N45 engine in 116i and 316i versions. It is responsible for precise control of fuel injection, ignition, and communication with other electronic vehicle systems, ensuring stable engine performance under various load conditions. As an element integrated with the CAS system, the controller works with the start authorization system, which is crucial for vehicle security and proper communication with other onboard modules. This makes it possible to maintain the consistency of the car's electronic configuration after replacing a faulty engine computer.

Benefits of using an original BMW module

Choosing a controller from the Electronic control modules and controllers family dedicated to a specific engine and transmission configuration minimizes the risk of compatibility issues. Proper matching to the N45 petrol engine and manual transmission allows for maintaining factory operating parameters, which translates into predictable vehicle behavior and correct cooperation with service diagnostics. The offered item is a used part, which represents a reasonable compromise between repair costs and maintaining the original BMW electronic architecture. In many cases, using such a solution allows for significantly reducing the cost of restoring the drivetrain's efficiency while maintaining the high quality of workmanship characteristic of the brand.

Compatibility and selection by part numbers

The DME computer has an assigned OEM part number and a set of interchangeable numbers, which facilitates precise identification and selection of the correct module for a specific vehicle version. Before purchasing, it is worth comparing the markings with the currently installed controller or verifying them in the service documentation to ensure full compliance with the car's electrical installation and software. Thanks to the presence of various reference numbers, it is possible to use the module in several equipment variants within the same engine family, which increases the flexibility of part selection while maintaining the manufacturer's technical requirements.

Application in service practice

This DME computer model will work well both for standard replacement of a damaged controller and in situations where more advanced repair of the engine's electronic system is necessary. Combined with the appropriate programming and adaptation procedure, it allows for restoring proper communication with the CAS system and other onboard modules. Due to its design for a petrol engine paired with a manual transmission, the module is particularly useful in vehicles used intensively in urban traffic, where the engine control system is exposed to frequent changes in load and operating temperature.

More about used electronics and related parts

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as engine controllers, comfort modules, or transmission controllers, check the available parts in the BMW electronic control modules and controllers category. Before deciding to install a used controller, it is worth learning the best practices for selecting and operating such elements – you can find practical tips 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 safety, cost-effectiveness, and automotive electronics diagnostics.