BMW 1 3 Series E87 E90 M47N2 118d 318d 122HP ECU KIT DDE + CAS2 + Key 7799854

The BMW E87 E90 M47N2 118d 318d 122HP Engine Control Unit Set DDE CAS2 Key is a complete, used electronic set designed for BMW powertrains with the M47N2 engine. In one package, you receive the DDE control unit, the CAS2 module, and a matched key, significantly simplifying professional replacement and restoring proper engine operation. This is a practical solution for workshops and users who want to resolve engine electronics issues in a controlled manner.

Specifications and technical data

• SKU: 7799854-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7799854
• Substitutable numbers: 13617808124 0281012880 61356981416, 7808124 0 281 012 880 6981416, 13617799854 13617798179 13617801710, 13617797216 13617803372 13617797496, 13617795844, 7799854, 7798179 7801710 7797216, 7803372 7797496 7795844
• Category: ECUs & Computer Modules

Purpose and Function of the Set

The presented DDE + CAS2 + Key set is dedicated to BMW 1 Series E87 and 3 Series E90 models with the 122 HP M47N2 engine. The set is responsible for managing the operation of the diesel engine, authorizing startup, and communicating with the immobilizer system, thus forming a cohesive package for use when replacing a damaged engine control unit or CAS module.

Combining the DDE control unit with the CAS2 module and a matched key avoids time-consuming element matching from scratch, which is particularly important for repairs requiring quick restoration of the vehicle to operational status.

Benefits of Using the Complete DDE CAS2 Key Set

Using a complete set offers a number of practical advantages, especially in the context of servicing modern BMW electronic systems:

• cohesion of elements responsible for engine startup and control,
• reduced risk of immobilizer synchronization problems,
• simplified workshop operations for diagnostics and installation,
• possibility of economical vehicle repair using used parts.

For many users and service centers, choosing such a solution is a sensible alternative to purchasing new components, especially for older BMW generations where both functionality and repair cost-effectiveness are important.

Product Characteristics and BMW Compatibility

The set belongs to the Electronic Control Modules and Units group, meaning it is an element that directly interacts with the vehicle's communication bus and other comfort and safety modules. As a genuine BMW part, it maintains the factory connection architecture, which promotes proper integration with the car's electrical system.

The used nature of the set allows for a favorable cost-effectiveness ratio while maintaining the original operating logic of the engine control system. This is particularly important for vehicles where reliability and predictable powertrain behavior are a priority.

Practical Application in Service

The complete DDE CAS2 set with key is suitable for both professional BMW-specialized services and independent workshops dealing with automotive electronics. It facilitates:

• repairs after engine control unit damage,
• resolving startup authorization issues,
• engine unit swaps within compatible models.

For those who want to expand their knowledge about the operation of control modules in BMW 3 and 5 Series and the use of salvaged parts, the article: How to Care for BMW Electronic Modules and Safely Use Used Parts will be helpful.

Why Choose an Original BMW Module

Choosing an original engine control unit set with CAS2 module and key primarily means maintaining compatibility with the vehicle's factory architecture. Proper integration with the electrical system, correct communication with other modules, and predictable system behavior are key arguments in favor of this solution.

If you are also interested in other control electronics components, you can explore our offer in the Electronic Control Modules and Units{data-blogs=category} section, where you will find a wide selection of components for various BMW models and other makes.