BMW 1 3 Series E87 LCI E90 120i 320i Petrol ECU Kit N43 DME 7579142 CAS3 Key

BMW Engine Control Unit Kit for N43 Petrol Engine is a set designed for BMW 1 Series E87 LCI and 3 Series E90 120i / 320i models. The kit includes the DME electronic control module, CAS3 module, and a key, ensuring a cohesive match of the vehicle's electronic components and facilitating the restoration of proper petrol engine operation.

Specifications and technical data

• SKU: 7579142-13
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7579142
• Substitutable numbers: 12147583225, 7583225, 121476211781214759988112147595179, 121475936661214750722712147579142, 7621178, 75998817595179759366675072277579142, 121475853031214758322512147580279, 75853037583225758027975756657573758, 5WK93709, 61359147220, 9147220, 51167130711, 7130711, 51167154478, 7154478
• Fuel type: Petrol
• Category: ECUs & Computer Modules

Application and Compatibility with N43 Engine

The presented kit belongs to the category of electronic control modules and units and is intended for BMW cars with N43 petrol engines in the 120i and 320i versions. The set is particularly useful when replacing a damaged control unit, experiencing communication issues on the vehicle bus, or needing to adapt the electronics after an engine replacement.

Combining the DME, CAS3 module, and key in one kit reduces the risk of software and immobilizer incompatibilities, which in practice shortens the vehicle's diagnostic and configuration time after installation.

Construction of the ECU DME + CAS3 + Key Set

The kit includes the DME engine control unit responsible for managing the petrol engine's operation, the CAS3 module handling start authorization, and a key matched to this set. This configuration maintains data consistency within the vehicle's security system and simplifies restoring proper starting after an electronic failure.

By preserving the original BMW architecture, the set allows for the retention of factory ignition control logic, fuel delivery, and integration with other vehicle systems, which is particularly important in modern petrol engines.

Benefits of Using an Original BMW Control Module

Choosing an original ECU DME set with CAS3 and key ensures:

• cohesion of electronics responsible for starting and controlling the petrol engine,
• retention of factory operating parameters for the N43 unit,
• reduction of issues with immobilizer coding and module synchronization,
• possibility of further diagnostics using standard BMW service tools.

For workshops specializing in the BMW brand, such a kit is a practical solution for engine electronics repairs, allowing for reduced service time and fewer potential points of failure.

Condition, Verification, and Service Purpose

The kit components are from dismantled vehicles and are intended for reinstallation in BMW 1 Series E87 LCI and 3 Series E90 models with the N43 petrol engine. Before installation, standard in-vehicle verification and potential software adaptation according to manufacturer procedures are recommended to ensure proper cooperation with other modules in the specific car instance.

Due to the nature of electronic systems, installation should be performed by a workshop experienced in working with BMW systems and having access to appropriate diagnostic software.

BMW Electronic Control Modules and Units – Offer

If you are looking for other BMW electronic control modules and units for service applications or vehicle electronics upgrades, check out our dedicated category: BMW electronic control modules and units. There you will find a wide selection of components tailored to various models and generations of this brand.

More on the Role of Original Modules in Preserving Brand Character

When working with the electronics of modern cars, it is crucial to use original modules that preserve factory settings and driving characteristics. In the context of another premium brand, but with a similar approach to precision, it is worth reading an article describing the impact of original components on maintaining the manufacturer's DNA: Audi and Pure Emotion – How Used Parts Help Maintain Brand DNA. Although it concerns Audi, the issues discussed there clearly demonstrate the importance of correctly selected electronic modules also in BMW.