BMW Z4 Series E89 30i N52N 258HP N52B30A ECU Kit DME CAS3 Key 7594483 Automatic

BMW Z4 Series E89 30i N52N 258HP N52B30A ECU Kit DME CAS3 Key is a solution designed for workshops and users who need a consistent, factory-spec engine control and immobilizer package. The kit is matched to the N52B30A engine version and automatic transmission, which facilitates the restoration of full drivetrain functionality after an electronics failure or when replacing the power unit.

Specifications and technical data

• SKU: 7594483
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7594483
• Substitutable numbers: 12148613000 12147594483 5WK91136 61359147226, 8613000 7594483 9147226, 12147639564 12147624048 12147614359 12147605429, 7639564 7624048 7614359 7605429, 12147629052 12147609656 12147591709 12147583468, 7629052 7609656 7591709 7583468, 12147577996 12147587164, 75
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and compatibility

The presented control kit is dedicated to the BMW Z4 Series E89 30i with the N52N engine, in the 258 HP version, with the N52B30A unit. The integration of the DME module with the CAS3 module and the matched key allows for maintaining the consistency of the security and engine control system, which is particularly important when replacing electronics in modern BMW vehicles. A solution of this type is particularly useful for:

• replacing a damaged DME engine controller,
• problems with the CAS3 module and key authorization,
• engine swaps within the same generation of N52 units,
• restoring full functionality after electrical system damage.

Functionality of the BMW Z4 Series E89 30i N52N 258HP N52B30A ECU Kit DME CAS3 Key

The kit includes an electronic engine control module (DME), a CAS3 module responsible for start authorization, and a matched key. Thanks to this, the user receives a consistent package in which the elements are synchronized in terms of coding and security. Such a configuration significantly reduces the need for time-consuming programming from scratch and facilitates service work. In practice, this means:

• maintaining compatibility with the factory BMW immobilizer system,
• easier adaptation in a vehicle with an automatic transmission,
• the possibility of faster diagnostics and configuration compared to selecting individual modules.

Benefits of using an original BMW module

The original control module from the Electronic control modules and controllers group ensures the preservation of the factory operating parameters of the N52B30A engine, including the power and torque characteristics intended for the 30i 258 HP version. The used OEM element is already verified in real operating conditions, which for many workshops is a practical alternative to cheap replacements of uncertain origin. The main advantages of such a solution include:

• software consistency with the rest of the vehicle's systems,
• preservation of the original operating characteristics of the N52N unit,
• reduction of the risk of compatibility problems compared to non-original controllers.

Integration with automatic transmission

The presented kit is intended for vehicles with an automatic transmission, which is crucial for the correct cooperation of the engine controller with the modules responsible for gear shifting. Proper communication between the DME and the transmission control system affects the smoothness of gear changes, throttle response, and the overall refinement of the drivetrain. Thanks to this solution, the workshop can:

• minimize the risk of communication errors between the engine controller and the transmission,
• speed up the vehicle startup process after repair,
• maintain operating parameters consistent with factory BMW assumptions for the automatic version.

Condition and use in professional service

The item comes from the secondary market, which allows for an economical restoration of vehicle efficiency while maintaining the manufacturer's original specifications. Such kits are eagerly used by specialized BMW services that need a complete engine control and security package for quick repair implementation. If you are planning a comprehensive repair or upgrade of the engine electronics area in your BMW and need other elements from the same group, such as engine controllers, comfort modules, or transmission controllers, check the available parts in the BMW electronic control modules and controllers category.

More about the role of original modules in modern cars

In premium vehicles, such as BMW or Audi, the consistency of electronics has a direct impact on the car's character, the precision of throttle response, and the overall driving experience. If you are interested in how original modules and controllers affect the car's behavior and why it is worth choosing proven elements from the secondary market, read the article: Audi and emotions in their purest form. How do used parts help maintain the brand's DNA?. If you want to better plan your purchases of used components – from controllers to small mounting elements – the guide on completing parts in one place may also be helpful: Comprehensive supply: From the engine to the smallest clip – how to complete used car parts in one place?.