BMW 1 3 Series E87 E90 E91 118d 318d M47N2 Engine ECU Kit DDE CAS2 Key 7808124

BMW 1 3 Series E87 E90 E91 118d 318d M47N2 Engine ECU Kit DDE CAS2 Key is a complete engine control kit designed for selected BMW 1 and 3 Series models with the M47N2 unit. The set includes a DDE controller, a CAS2 module, and a key, allowing for a coherent, professional replacement of the powertrain control electronics. This solution is particularly useful in the event of a factory controller failure or when it is necessary to match a complete ECU–immobilizer–key package.

Specifications and technical data

• SKU: 7808124
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7808124
• Substitutable numbers: 13617808124, 7808124, 13617803372, 7803372, 13617801710, 7801710, 13617799854, 7799854, 13617798179, 7798179, 13617797496, 7797496, 13617797216, 7797216, 13617795844, 7795844, Control Unit, 0281013502, 0 281 013 502, 61356943759
• Category: Control Modules

Application of the ECU DDE CAS2 Key kit

The presented kit is intended for BMW 1 Series E87 118d and BMW 3 Series E90/E91 318d vehicles with the M47N2 engine. Combining the DDE engine controller with the CAS2 module and a matched key allows for maintaining the integrity of the security system and proper communication within the vehicle's bus. This minimizes the risk of starting problems, immobilizer errors, or software incompatibility.

Construction and function of the kit components

The ECU kit includes three key electronic control components:

• a DDE engine controller responsible for managing the operation of the M47N2 unit (fuel dosage, boost pressure, injection parameters),
• a CAS2 module acting as the central element of the vehicle access and starting system,
• a key matched to the CAS2 module and the controller, ensuring correct start authorization.

A set configured in this way allows for the consistent transfer of control logic and security from one vehicle to another, which is particularly important when replacing a damaged controller in modern electronic systems.

Benefits of using a complete engine controller kit

Choosing a complete ECU kit with a CAS2 module and key offers a number of practical advantages:

• system consistency – the controller, CAS2 module, and key come from a single set, which facilitates adaptation in the vehicle and limits the need for advanced programming,
• reduction of immobilizer problems – matched components reduce the risk of errors related to start authorization,
• possibility of effective vehicle repair after an engine electronics failure,
• preservation of the factory operating logic of the M47N2 unit, which promotes stable and predictable operation.

The product belongs to the Computers and controllers group, which means it is a critical element for the operation of the powertrain and electronic communication in the vehicle.

Product characteristics and fitment

The kit comes from the BMW range, which ensures structural compatibility with E87, E90, and E91 platforms and proper fitment to the electrical architecture of these models. As a used item, it is an economical solution for workshops and individual users who want to restore vehicle performance while maintaining high-quality original parts. Before installation, it is recommended to verify software compatibility and vehicle equipment configuration with the target controller.

BMW computers and controllers – engine system expansion and repair

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 DDE controllers, CAS modules, or other engine management units, check the available parts in the BMW computers and controllers category.

More about used electronics and parts

When selecting a used engine controller or a complete ECU kit, it is worth knowing the basic principles of selection and installation of such elements. Practical tips on when it pays to reach for used electronics, how to assess their suitability, and what to pay attention to during installation can be found in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

If you want to better understand the specifics of the second-hand parts market and dispel doubts regarding their quality and durability, the guide Used car parts: Myths and facts you need to know, which discusses the most common concerns related to the installation of used components, will also be helpful.