BMW E81 E87 LCI E90 N43 116i 316i 122HP ECU Kit DME 7621178 CAS3 Key Automatic

BMW E81 E87 LCI E90 N43 116i 316i 122HP ECU Kit DME CAS3 Key Automatic is a complete control kit designed for petrol BMW models with an automatic transmission, including the DME module, CAS3 module, and a matched key. The set belongs to the Electronic control modules and controllers group, which ensures consistent operation of the vehicle's powertrain and comfort systems. This solution is particularly useful when replacing a damaged engine control unit or resolving immobilizer issues.

Specifications and technical data

• SKU: 7621178-6
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7621178
• Substitutable numbers: 7621178, 12147621178, 7640015, 12147640015, 5WK94901, 61359226238, 9226238, 61359395657, 9395657, 61359287535 61359237047 61359217853 61359147226, 9287535 9237047 9217853 9147226
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Application of the ECU DME CAS3 kit with key

The presented kit is intended for BMW 1 Series and 3 Series vehicles with the 122 HP N43 petrol engine, paired with an automatic transmission. The combination of the DME controller, CAS3 module, and key allows for maintaining the integrity of the security system and engine control logic, which is crucial when replacing electronics in modern vehicles.

A complete set of this type helps reduce the risk of starting problems, immobilizer errors, or software incompatibility between individual modules. For workshops and users, this means a more predictable installation process and easier vehicle configuration after repair.

Benefits of using an original BMW controller kit

Original BMW electronic control modules and controllers are designed for precise cooperation with specific engine and transmission versions. Using a complete ECU DME kit with CAS3 and a key ensures:

• preservation of factory petrol engine control logic,
• consistency of the immobilizer system and key authorization,
• better compatibility with the vehicle's electrical system,
• reduction of the need for deep programming from scratch.

For vehicles with an automatic transmission, correct communication between the engine controller and other modules is particularly important, which translates into smooth gear shifting and stable powertrain operation.

Technical characteristics and compatibility

The kit has been designed to work with a petrol engine and an automatic transmission, making it a suitable choice for control system repairs in these configurations. The presence of the OEM part number and an extensive list of interchangeable numbers facilitates precise verification of compatibility with a specific vehicle.

Before purchasing, it is recommended to compare the markings with the vehicle data and consult a mechanic or automotive electrician to confirm the possibility of using the kit in a given BMW. Proper controller selection minimizes the risk of additional costs associated with adaptation or component replacement.

Product condition and installation aspects

The offered set comes from the category of used electronic components, which is a cost-effective solution while maintaining the manufacturer's original specifications. The ECU DME kit with the CAS3 module and key is particularly practical in situations where several elements of the security or engine control system have been damaged simultaneously.

Installation in a specialized service center with experience in working with BMW electronics is recommended, which will allow for proper connection, potential adaptation, and verification of the correct operation of all functions after installation.

Expert support and selection of used electronics

If you want to better understand how to safely select used engine controllers, CAS modules, and other electronic components, it is worth reading the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. You will find practical tips there regarding selection by OEM numbers, hardware and software compatibility, and examples of applications in real repairs.

Additionally, when planning to purchase other used components online, a step-by-step guide may be helpful: Safe purchase of used car parts online – a step-by-step guide, which discusses the strategy for verifying offers, the importance of part numbers, and best practices for workshops and individual users.

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