BMW 1 3 Series E87 LCI E90 120i 320i Petrol ECU Kit N43 DME CAS3 Key 7595179

The complete DME engine control unit with CAS3 module and key for BMW 1 and 3 Series with N43 petrol engine is a practical solution for workshops and users who need a tested engine electronics set. The set comes from dismantling, allowing for an economical yet professional repair of the powertrain control system in BMW 120i and 320i models of the E87 LCI and E90 generation.

Specifications and technical data

• SKU: 7595179-12
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7595179
• Substitutable numbers: 12147583225, 7583225, 121476211781214759988112147595179, 121475936661214750722712147579142, 7621178, 75998817595179759366675072277579142, 121475853031214758322512147580279, 75853037583225758027975756657573758, 61359147226, 9147226, 5WK93727, 12147599881, 7599881, 12147595179, 7595179, 12147593666, 7593666
• Fuel type: Petrol

Purpose and Function of the ECU DME + CAS3 + Key Set

The presented set is dedicated to BMW vehicles with the N43 petrol engine, specifically for the 120i and 320i versions of the 1 Series E87 LCI and 3 Series E90. The set includes the DME engine control unit, the CAS3 module responsible for start authorization, and a matching key, which significantly simplifies restoring the full functionality of the electronic system after a failure or damage to the original components.

Combining these components in one set helps avoid issues with immobilizer matching, synchronizing the control unit and key, and reduces the time needed for vehicle configuration after repair.

Benefits of Using an Original BMW Set

Using original BMW components ensures:

• preservation of the factory operating logic of the DME engine control unit for the N43 unit,
• consistency between the CAS3 module and the control unit, which facilitates adaptation procedures,
• the ability to restore correct starting and stable operation of the petrol engine without the need for extensive wiring modifications.

For workshops specializing in the BMW brand, such a set is a convenient service solution, allowing for efficient diagnostics and quick replacement of damaged electronics in 1 and 3 Series vehicles.

Application in Repairs, Swaps, and Tuning

The DME + CAS3 + Key set can be used in standard repairs as well as in modernization projects where the engine control unit or the entire powertrain needs replacement. Because the components come from a single vehicle, they provide a good basis for further software configuration, ignition maps, or fuel maps in the N43 petrol engine.

If you are planning an extensive modification project or want to better understand how to effectively use used electronic components in performance projects, it is worth reading the article on the best used parts for tuning your car, which discusses a practical approach to selecting parts from dismantling.

Condition, Verification, and Technical Aspects

The set is a used item, which means that before installation, standard diagnostic verification in the target vehicle and checking compatibility with the specific equipment configuration are recommended. In workshop practice, the following are most commonly performed:

• checking the communication of the DME control unit with the vehicle's bus,
• verifying the correctness of start authorization by the CAS3 module,
• potential adaptation or programming for a specific VIN and car equipment.

For specialists in BMW electronics, information on the operation and repair of other modules, such as engine control units or comfort modules, may also be useful. In this context, the entry on the long-term operation of iDrive systems and electronic modules in BMW 3 and 5 Series using parts from dismantling, which shows good practices for working with second-hand electronics, will be helpful.

Summary of Application in BMW 1 and 3 Series

The BMW 1 3 Series E87 LCI E90 120i 320i Petrol ECU Kit N43 DME + CAS3 + Key is a complete, used engine electronics set designed for petrol models with the N43 unit. By combining the DME control unit, CAS3 module, and key in one package, it simplifies the process of repairing, replacing, or upgrading the engine control system, ensuring component consistency and a good basis for further configuration in specialized BMW service centers.