BMW E60 LCI E90 E91 335i 535i N54B30A ECU Kit DME CAS3 Key 7602118 Dual Clutch

BMW E60 LCI E90 E91 335i 535i N54B30A ECU Kit DME CAS3 Key Dual Clutch is a complete electronic set from the Electronic Control Modules and Controllers category, designed for advanced management of gasoline engine operation and integration with an automatic transmission. The set includes the DME engine control unit, the CAS3 module, and a key, which facilitates the matching of components in a single package and reduces the risk of immobilizer synchronization issues.

Specifications and technical data

• SKU: 7602118-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7602118
• Substitutable numbers: 12147616431, 12147602118, 5WK93738, 61359217853, 7616431, 7602118, 9217853
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the BMW E60 LCI E90 E91 335i 535i N54B30A ECU Kit DME CAS3 Key Dual Clutch

The presented set is dedicated to selected BMW 3 and 5 series models with the N54B30A unit, where precise gasoline engine control and correct cooperation with the automatic transmission are crucial. Combining the DME controller with the CAS3 module and a matched key ensures the consistency of the security system, which in practice facilitates the adaptation process in the vehicle and limits the need for deep software intervention.

A set configured in this way allows for maintaining the factory logic of the drivetrain, including support for functions related to starting, key authorization, and communication with other modules in the vehicle.

Benefits of using a complete BMW controller set

Using a complete DME + CAS3 + key package in BMW cars with the N54B30A engine and automatic transmission brings a number of practical benefits:

• consistency of elements in one set, which facilitates vehicle electronics configuration,
• maintaining compliance with BMW's electrical architecture and communication buses,
• reducing the risk of conflicts between the engine controller and the immobilizer module,
• the ability to restore full functionality of the drivetrain after a failure of the original controller.

For workshops specializing in the BMW brand, such a set is a convenient service solution, allowing for reduced diagnostic and assembly time and optimized repair costs compared to sourcing individual modules.

Characteristics of operation with a gasoline engine and automatic transmission

The system has been designed to work with a gasoline engine, which means appropriately selected control maps, ignition strategies, and air-fuel mixture management. Integration with the automatic transmission allows for smooth data exchange between the engine controller and the gear shifting system, which translates into stable drive operation, predictable throttle response, and correct handling of driving modes.

In practice, a properly selected ECU set for the N54B30A unit supports maintaining appropriate engine operating parameters while simultaneously cooperating with comfort and safety systems that communicate with the CAS3 module.

Application in BMW electronics diagnostics and repairs

This type of ECU set is particularly useful for:

• repairs after damage to the engine controller or CAS3 module,
• engine swaps within compatible BMW models,
• advanced diagnostics of starting and key authorization problems,
• restoring vehicle configuration after major electrical faults.

Because the key elements of the control system are included in one package, the logic of the factory electronics can be effectively recreated, which is important both for independent service centers and users who care about the technical consistency of the vehicle.

Condition, verification, and selection of used electronics

The elements included in the set come from the secondary market, which allows for significantly lowering repair costs compared to purchasing new modules. Before installation, it is recommended to perform professional diagnostics and verify compatibility with the specific vehicle configuration, including software version and additional equipment.

If you want to better understand when choosing used controllers and modules makes sense and how to safely select such components, check out our guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?

If you are planning a comprehensive repair or upgrade of the control electronics area in your BMW and need other elements from the same group, such as additional controllers, body modules, or engine management systems, check the available parts in the BMW Electronic Control Modules and Controllers category.