BMW E87 E90 N45 116i 316i 1.6 Petrol Engine ECU DME 7557809 Manual Transmission

BMW E87 E90 N45 116i 316i 1.6 Petrol Engine ECU DME Manual Transmission is a factory electronic control unit designed for 1.6 N45 petrol engines in 1 Series and 3 Series models. As part of the Electronic control modules and controllers category, it is responsible for precise engine management, ensuring stable power characteristics and proper interaction with auxiliary components. This is a solution for users looking for a proven ECU controller tailored to the specifics of a BMW drivetrain with a manual transmission.

Specifications and technical data

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

Purpose and function of the DME controller

The presented engine computer is designed to work with the 1.6 N45 petrol engine used in BMW E87 and E90 models in 116i and 316i versions. The DME controller monitors key engine operating parameters, such as fuel injection, ignition timing, and auxiliary component operation, which translates into smooth acceleration, predictable throttle response, and stable idling.

Thanks to its factory architecture, the module is optimized for use with a manual transmission, allowing for the maintenance of correct load maps and torque characteristics across the entire RPM range. Using an original controller to replace a faulty unit helps restore proper drivetrain operation without the need for installation modifications.

Benefits of using an original BMW ECU

Using an original DME module in BMW cars with an N45 engine provides a number of practical operational benefits:

• preservation of factory engine control strategies, tailored to the specific unit and body version,
• proper interaction with the vehicle's onboard systems, including the fuel system and safety systems,
• software consistency with the vehicle configuration, which facilitates diagnostics and potential updates,
• the ability to restore stable engine operation after a previous controller failure without interfering with the electrical wiring.

For users who value predictable car behavior and compliance with factory design assumptions, choosing such an ECU is a technically safe solution that is functionally consistent with the rest of the drivetrain.

Technical characteristics and compatibility

The engine control computer from this offer belongs to the Electronic control modules and controllers group, which means it is an integral part of the vehicle's electronic architecture. The module is designed to work with a petrol engine and a manual transmission, so it should be selected exclusively for vehicle configurations with the same drivetrain parameters.

Before purchasing, it is recommended to verify compatibility using the OEM number or interchangeable numbers and to compare hardware and software markings with the currently installed controller. Proper selection based on engine version, model year, and equipment minimizes the risk of data bus communication issues, auxiliary component errors, or the need for additional installation modifications.

Condition, installation, and practical aspects

The offered controller is a used item, which in practice means a favorable cost-to-functionality ratio while maintaining the factory BMW design. Before installation, procedures related to adaptation or programming for a specific vehicle must be taken into account, including potential coding, synchronization with the immobilizer, and checking for diagnostic errors.

Professional installation and configuration by a workshop equipped with appropriate service software allow for fully utilizing the module's potential, restoring proper drivetrain operation. For many users, this is an effective way to solve problems with starting, rough engine operation, or randomly appearing controller errors without the need to purchase a new unit.

Expanding knowledge and selecting BMW electronics

If you want to better understand how to safely choose used engine controllers and other electronic modules, including issues of selection by OEM numbers, hardware and software compatibility, and proper installation, check out our guide: Used automotive electronics – second-hand ECU modules and sensors. This is a practical addition to your knowledge when planning an engine computer replacement in a BMW.

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 DME controllers, ECU modules, or electronic controllers working with the engine, check out the available parts in the BMW electronic control modules and controllers category.