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

BMW E87 E90 N45 116i 316i 116HP Petrol ECU Kit DME + CAS 2 + Key Manual is an original engine control module from the Electronic control modules and controllers category, designed for N45 petrol engines paired with a manual transmission. It enables precise engine management, ensuring stable driving characteristics and proper communication with other vehicle systems. This solution is dedicated to users who expect factory compatibility and predictable powertrain performance.

Specifications and technical data

• SKU: 7557809-5
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7557809
• Substitutable numbers: 12147557809, 7557809, 12142461574, 2461574, 0261209085, 6981416, 61356981416
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the DME controller

The presented DME computer is responsible for advanced control of the petrol engine in BMW 1 Series E87 and 3 Series E90 models in 116i and 316i versions with the N45 unit. The module oversees, among other things, fuel injection, ignition, and interaction with safety and comfort systems, which translates into predictable throttle response and consistent vehicle behavior under various operating conditions.

Thanks to its factory architecture, the controller is optimized for use with a manual transmission, allowing for smooth gear changes and stable engine operation under variable loads. Using an original module from the same family ensures consistency of software and control logic with the rest of the vehicle's systems.

Benefits of using an original BMW module

Using an original DME computer to replace a damaged or unstable controller allows for the restoration of proper powertrain operation without the need for electrical system modifications. This is particularly important in vehicles experiencing issues with starting, rough engine idling, communication errors with other modules, or incorrect gear shift response.

Key advantages of this solution include:

• factory compatibility with the N45 petrol unit,
• optimized for manual transmission operation,
• preservation of original engine control logic and vehicle system integration,
• suitability for professional diagnostic and programming processes.

The module is sourced from dismantling, allowing for cost-effective repairs while maintaining the manufacturer's original specifications. For many users, this is a reasonable compromise between cost and quality, especially for older generations of the 1 and 3 Series.

Application in petrol systems with manual transmission

The controller is designed for use with a petrol engine and a manual transmission, which is significant for both part selection and subsequent configuration. Proper matching of the module to the fuel type and transmission type minimizes the risk of communication errors, adaptation issues, and malfunctions related to engine load functions.

In practice, this means that after correct installation and programming, you can expect stable engine performance, predictable behavior during gear changes, and proper cooperation with other controllers in the vehicle. This is especially important in daily use, where parameter repeatability and the absence of random electronic faults are essential.

Professional installation and vehicle integration

To fully utilize the module's potential, installation by a specialized service center equipped with appropriate BMW diagnostic software is recommended. This allows for proper coding of the controller, adaptation to the specific vehicle configuration, and verification of communication integrity with other electronic network components.

A properly executed installation and programming process results in:

• stable engine starting and correct idle operation,
• consistent performance of safety and comfort functions dependent on the engine controller,
• easier diagnostics of potential future faults.

More about BMW electronic modules

If you want to better understand how to maintain your engine controller, comfort modules, or iDrive system in 3 and 5 Series models, and how to safely use parts from dismantling, it is worth consulting specialized materials. Practical tips on diagnostics, programming, and selecting used components can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models, which discusses, among other things, BMW engine controllers and FRM modules.

If you are planning a comprehensive repair or upgrade of your BMW's engine area and need other components from the same group, such as engine controllers, comfort modules, or engine management units, check out the available parts in the BMW electronic control modules and controllers category.