BMW E81 E87 E90 LCI 120d 320d N47 ECU Kit DDE 8506374 CAS3 + Key Manual

BMW E81 E87 E90 LCI 120d 320d N47 ECU Control Unit Key Set CAS3 is a complete set from the Electronic Control Modules and Units category, designed for BMW vehicles with an N47 engine and manual transmission. The set includes the ECU engine control unit with the CAS3 module and key, facilitating the restoration of proper powertrain operation and vehicle authorization system. This solution ensures consistent compatibility of electronic components in Series 1 and 3 vehicles after the LCI (Life Cycle Impulse) update.

Specifications and technical data

• SKU: 8506374-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8506374
• Substitutable numbers: 13618512498, 8512498, 13617812538, 7812538, 13618506437, 8506437, 13618510591, 8510591, 13617823421, 7823421, 13618506374, 8506374, 13617823420, 7823420, 13618506438, 8506438, 0281016067, 0 281 016 067, 61359147226, 9147226
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Application of ECU Control Unit with CAS3 Set

The engine control unit set with CAS3 module and key is intended for BMW E81, E87, and E90 LCI models in the 120d and 320d versions with the N47 engine. Combining these components in one package simplifies the matching of drive electronics, immobilizer, and starting system, reducing the need for additional programming or replacement of individual modules.

This solution is particularly useful for:

• replacing a damaged engine control unit after an electrical or mechanical failure,
• communication issues between the ECU and the CAS3 module,
• inability to start the vehicle due to key authorization errors.

Benefits of Using an Original BMW Set

The complete ECU + CAS3 + key set is from the BMW brand, ensuring compatibility with the vehicle's factory electrical architecture. This means:

• correct cooperation with the vehicle's wiring and CAN network is maintained,
• the control unit supports the appropriate N47 engine operating maps for the given configuration,
• the CAS3 module interacts with the security system as intended by the manufacturer.

Such matching minimizes the risk of coding problems, communication errors, and improper functioning of comfort and starting features.

Compatibility with Manual Transmission

The presented set is designed for vehicles equipped with a manual transmission. This is important when selecting a control unit, as the software configuration and signal handling differ from automatic transmission versions. Proper matching to the transmission type:

• facilitates correct cooperation with clutch and speed sensors,
• ensures appropriate torque control strategies,
• minimizes the risk of errors related to drive configuration incompatibility.

Characteristics of the Used Set

The set is from a dismantled vehicle, allowing for an economical restoration of the vehicle's functionality while maintaining the original manufacturer's specifications. A used ECU set with CAS3 module and key is a good choice when repairing or refurbishing the existing control unit is cost-prohibitive or technically difficult.

For added certainty of compatibility, it is advisable to compare part numbers with the product's technical specifications and verify compatibility with the specific N47 engine version and car year.

BMW Electronic Control Modules and Units – Selection and Advice

If you are looking for other BMW Electronic Control Modules and Units, check out our dedicated category: BMW Electronic Control Modules and Units. There you will find a wide selection of onboard electronics components tailored for various series and generations of this brand.

When planning repairs to the engine electronics or security system, it is also worth familiarizing yourself with practical tips on choosing used parts and their impact on the character of a premium car. The article on our blog may be helpful: Audi and Pure Emotion – How Used Parts Help Maintain the Brand's DNA, which shows how appropriately selected original electronic modules allow for maintaining the vehicle's factory characteristics.