BMW 1 3 Series E81 E87 LCI 116i 1.6 N43 (122HP) ECU Kit DME CAS3 Key 7583225

BMW 1 3 Series E81 E87 LCI 116i 1.6 N43 (122HP) ECU Kit DME CAS3 Key is a complete electronic set from the Electronic Control Modules and Controllers category, designed for the N43 122HP petrol engine in selected 1 and 3 Series models. The kit includes the DME engine control unit, CAS3 module, and a matched key, which significantly facilitates professional replacement of the control system in a BMW vehicle.

Specifications and technical data

• SKU: 7583225-17
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7583225
• Substitutable numbers: 12147583225, 7583225, 61359226238, 9226238, 12147640015, 7640015, 12147621178, 7621178, 12147579142, 7579142, 12147585303, 7585303, 12147580279, 7580279, 12147575665, 7575665
• Category: ECUs & Computer Modules

Purpose and function of the ECU DME CAS3 kit

The presented kit is dedicated to BMW 1 Series E81/E87 LCI 116i models with the N43 1.6 122HP unit, as well as selected 3 Series versions that use the same engine type and electronic architecture. Combining the DME engine control unit with the CAS3 module and key ensures the consistency of the immobilizer system, which is crucial when replacing electronics in modern BMW vehicles. In practice, this means the possibility of performing a complete engine control system replacement along with part of the security system, without the need for time-consuming matching of individual components. For workshops specializing in the BMW brand, this solution reduces diagnostic and installation time and limits the risk of synchronization issues between the key, CAS, and DME.

Benefits of using a complete engine control unit kit

Using a ready-made ECU DME CAS3 kit with a key in a BMW with an N43 engine brings a number of practical benefits:

• consistency of the electronics responsible for starting and engine operation,
• maintaining compatibility between the control unit, CAS3 module, and the transponder in the key,
• reducing the need to program the entire system from scratch,
• facilitating diagnostics in case of previous problems with the immobilizer or data bus communication. For the end user, this means more stable engine operation and greater predictability of vehicle behavior after repair. For the service center – a more organized installation and configuration process, especially in cars after previous, unsuccessful attempts at electronic repair.

Product characteristics and BMW compatibility

The kit comes from the original BMW line, which translates into factory-fit compatibility with the electrical installation and the vehicle's communication architecture. As an item in the Electronic Control Modules and Controllers category, it has been designed to work in the demanding environment of the engine bay and interior, while maintaining appropriate communication parameters with other modules in the vehicle. The presence of the OEM part number and related interchangeable numbers (visible in the technical specification) allows for precise verification of compatibility with a specific car configuration. Before purchasing, it is worth comparing the markings with the vehicle data or consulting a diagnostician to ensure that the kit will be suitable for a given BMW 1 or 3 Series unit.

Condition, origin, and service application

The product is used, which in the case of BMW electronics often constitutes a rational service choice – especially when repairing cars that are several or a dozen years old. Modules of this type are frequently used by specialized workshops dealing with BMW electronics, both for repairs after an engine control unit failure and for problems with the immobilizer, CAS3 errors, or lack of communication with the key. In practice, the kit can be used as a base for:

• restoring a functional starting system after damage to the original DME,
• solving problems with the CAS3 module and key authorization,
• projects related to swapping electronics between compatible BMW units.

Technical support and additional information

If you are planning a comprehensive repair or upgrade of the engine electronics area in your BMW and need other components from the same group, such as controllers, comfort modules, or engine management systems, check the available parts in the BMW Electronic Control Modules and Controllers category. To deepen your knowledge about the operation of engine control units, comfort modules, and the iDrive system in vehicles of this brand, it is worth reading the article describing practical aspects of repairs using dismantled parts: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models. This is a good supplement to information for workshops and conscious users who want to better understand how electronics work in their BMW.