BMW E87 LCI E90 118i 318i N43 143HP ECU KIT DME 7599881 CAS3 + Key Automatic

BMW E87 LCI E90 Engine Control Unit + Key Automatic CAS3 7599881 is a set from the Electronic Control Units and Controllers category, designed for BMW vehicles equipped with an automatic transmission. The set includes the engine control unit with the key and the CAS3 module, facilitating the matching of the powertrain electronics and the start authorization system in one cohesive package.

Specifications and technical data

• SKU: 7599881-2
• 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, 12147599882, 12147573758, 7579142, 12147579142, 5WK93729, 61359226238, 9226238, 61303422724, 3422724
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and Function of the CAS3 Engine Control Unit Set

The offered control set is dedicated to BMW 1 Series E87 LCI and 3 Series E90 models with automatic transmission configurations. The combination of the engine control unit with the CAS3 module and key allows for consistent management of starting, immobilizer, and communication with other vehicle modules, which is particularly important when replacing powertrain electronics.

Within a single set, the user receives components responsible for:

• coordinating the operation of the powertrain unit with the automatic transmission,
• key authorization and immobilizer management,
• interaction with the vehicle's CAN network for engine control.

Benefits of Using the Complete CAS3 Module with Key

Using the complete set of engine control unit + CAS3 + key reduces the need for zero-based programming of the entire security system. In many cases, this simplifies the adaptation process in the vehicle, as the key electronic components are already factory-matched. For workshops and users, this means:

• reduced risk of conflicts between the engine control unit and the CAS3 module,
• a more predictable installation and configuration process,
• easier diagnostics for subsequent inspections.

An additional advantage is that the product comes from the BMW line, which helps maintain compatibility with the vehicle's factory electrical architecture.

Characteristics of Operation with Automatic Transmission

The control unit in this set is prepared for cooperation with an automatic transmission. This means that the control logic includes communication with the transmission module, including:

• transmitting information about engine load and torque,
• coordinating gear changes with the current operating parameters of the powertrain unit,
• managing driving modes intended for automatic transmissions (e.g., comfort or dynamic, depending on the vehicle configuration).

Thanks to this, the set provides a proper basis for restoring the correct operation of the powertrain system in BMW cars equipped with an automatic transmission.

Condition, Origin, and Practical Application

The components included in the set are from the original BMW line and are classified as used. This type of electronics, when correctly selected by OEM number and interchangeable numbers, allows for economical vehicle repair without the need to purchase new modules. In practice, this is often the preferred solution by professional workshops specializing in the BMW brand.

If you want to better understand how to safely select and install used control modules, it is worth reading the guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECU Modules and Sensors?. The article discusses, among other things, selection by OEM numbers, hardware and software compatibility issues, and practical application examples.

Selection of Other BMW Electronic Control Units

If you are expanding or further repairing the electronic system in your car, you may also need other components from the Electronic Control Units and Controllers category dedicated to this brand. To quickly find matching components, use our offer on BMW Electronic Control Units and Controllers, where products optimized for BMW vehicles, including the E87 and E90 series, are gathered.