BMW E87 LCI E90 E91 N43 116i 316i 122HP Engine Unit ECU DME 7599881 Manual

BMW E87 LCI E90 E91 N43 116i 316i 122HP Engine Unit ECU DME is an original electronic control module designed for N43 petrol engines paired with a manual transmission. This ECU controller ensures precise engine management, enabling stable performance, correct throttle response, and proper integration with other vehicle systems. Thanks to its factory BMW design, it is a solution perfectly matched to the electrical installation and electronic architecture of these models.

Specifications and technical data

• SKU: 7599881-14
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7599881
• Substitutable numbers: 7599881, 12147599881, 7583225, 12147583225, 7507228, 12147507228, 7580279, 12147580279, 7593667, 12147593667, 7585654, 12147585654, 7575668, 12147575668, 7579144, 12147579144, 7585304, 12147585304, 7599882, 12147599882, 7573758, 12147573758, 7579142, 12147579142, 5WK93729, MSD812
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and compatibility

The presented engine controller is designed for BMW 1 Series E87 LCI and 3 Series E90/E91 vehicles with the 122 HP N43 engine in 116i and 316i versions. This is an ECU unit dedicated to vehicles with a manual transmission and petrol fuel system, which is crucial when selecting the appropriate module. Using the correct controller for the specific fuel type and transmission minimizes the risk of CAN bus communication errors, starting issues, and improper engine component operation.

Function in the engine control system

The engine control unit in this model is responsible for coordinating the fuel injection system, ignition, and a range of sensors and actuators working with the N43 unit. A correctly selected ECU module:

• manages fuel dosing and ignition timing based on load and operating conditions,
• communicates with body control modules and safety systems,
• supports OBD diagnostics, recording error codes and operating parameters,
• supports comfort and fuel economy functions intended for the specific engine variant.

This ensures the consistency of the entire powertrain's operation, and the vehicle responds predictably and in accordance with factory specifications.

Product characteristics and advantages

As an item from the Electronic control modules and controllers group, this engine computer is structurally matched to the electrical architecture of BMWs from the production period in question. Using an original controller ensures:

• proper hardware and software compatibility with the vehicle's installation,
• the possibility of correct coding and adaptation to a specific car,
• consistency with factory N43 engine maps for the 122 HP version,
• easier diagnostics and service compared to universal solutions.

The product comes from dismantling, which in practice means a favorable cost-to-functionality ratio while maintaining the original BMW specification. For many users, this is a reasonable choice when repairing engine electronics, especially when they want to maintain factory performance parameters.

Selection by numbers and technical support

When selecting an engine controller for a BMW E87 LCI, E90, or E91 with an N43 unit, it is worth paying attention to the compatibility of hardware and software markings, as well as matching the body style and equipment. In practice, the safest way is to select by OEM number or based on the vehicle's VIN, which helps reduce the risk of incompatibility. If in doubt, it is worth seeking the help of a specialist in BMW electronics who will verify the module's compatibility with the specific car configuration.

For those who want to better understand the principles of selecting used ECU modules, HW/SW compatibility issues, and typical installation and coding procedures, the following guide will be helpful: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. The article explains step-by-step what to look for when purchasing and installing such components.

Used ECU controller and repair cost-effectiveness

Using a second-hand engine control unit in a BMW with an N43 engine is often an economical solution, especially compared to purchasing a new module. With proper selection and professional installation, you can achieve stable powertrain performance at a relatively low cost for the entire operation. In many cases, this is a reasonable compromise between price and functionality, allowing the vehicle to be restored to working order without giving up original BMW electronics.

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