BMW Z4 E89 20i N20 184HP ECU Engine Unit Kit DME 7629006 CAS3 + Key Automatic

BMW Z4 E89 20i N20 184HP ECU Engine Unit Kit DME CAS3 + Key Automatic is an advanced set from the Electronic control modules and controllers category, designed for precise management of the powertrain. The kit includes an Engine Control Unit (ECU), a CAS3 module, and a matched key, which significantly facilitates professional replacement in vehicles with an automatic transmission and a petrol engine.

Specifications and technical data

• SKU: 7629006-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7629006
• Substitutable numbers: 12148603574, 8603574, 12147645762, 7645762, 12147626569, 7626569, 12147620943, 7620943, 12147629006, 7629006, 12147649431, 7649431, 12147629049, 7629049, 12147639375, 7639375, 0261S07451, 0 261 S07 451, 61359262361, 9262361
• Fuel type: Petrol
• Gearbox type: Automatic
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Purpose and function of the ECU kit

The presented set is configured for the BMW Z4 E89 model with an N20 engine producing 184 HP, running on petrol and paired with an automatic transmission. The ECU type: Engine Control Unit is responsible for controlling engine operating parameters, such as fuel dosage, ignition timing, or engine protection strategies, ensuring stable and predictable driving characteristics.

The inclusion of the CAS3 module and a matched key means a coherent set of components responsible for start authorization, which in practice simplifies the adaptation process in the vehicle and reduces the risk of conflicts with the immobilizer system.

Benefits of using the complete DME + CAS3 + key kit

Using a complete engine control kit in a BMW Z4 E89 brings a number of practical benefits for the workshop and the end user:

• consistency of components responsible for starting and engine control,
• reduced need for additional programming compared to replacing individual modules,
• maintaining proper cooperation with the automatic transmission,
• possibility of restoring correct engine operation after a failure of the original controller.

For vehicles with the N20 petrol engine, proper communication between the ECU, the CAS3 module, and other onboard systems is particularly important – such a kit helps maintain stable operating parameters and correct handling of comfort and safety functions related to starting the engine.

Technical characteristics for installation

As an item from the Electronic control modules and controllers category, the set has been designed to work within the BMW electronic architecture, taking into account the specifics of the N20 engine and the automatic transmission. The ECU type as an Engine Control Unit means that it is the central module managing the powertrain, communicating with sensors, actuators, and other controllers in the vehicle.

The used condition allows for economical repair while maintaining the original BMW control logic, which is particularly important for preserving the driving characteristics typical of this model. Before installation, standard workshop verification and matching the configuration to the specific vehicle according to the manufacturer's procedures is recommended.

Application in BMW diagnostics and repairs

The DME + CAS3 + key kit will prove useful both for typical replacement of a damaged controller and for more complex powertrain repairs where intervention in the start authorization system is necessary. The consistency of components in one set facilitates diagnostic work, shortens the time spent searching for the causes of starting problems, and minimizes the risk of incompatibility between modules.

In workshop practice, such a kit is particularly useful in situations where the original controller has suffered serious electrical or software damage, and restoring its configuration is difficult or unprofitable.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as additional controllers, management modules, or systems cooperating with the powertrain, check the available parts in the BMW Electronic control modules and controllers category.

More about the role of original modules in modern cars

Modern premium cars, such as BMW or Audi, rely heavily on precisely tuned electronic controllers for their characteristics. If you are interested in how properly selected used modules and equipment components help maintain the factory properties of a vehicle, it is worth reading the article on our blog: Audi and pure emotion – how used parts help maintain the brand's DNA.

Summary

BMW Z4 E89 20i N20 184HP ECU Engine Unit Kit DME CAS3 + Key Automatic is a practical, technically coherent engine control kit for the petrol version with an automatic transmission. It enables effective repair of the control system, maintenance of proper cooperation with the immobilizer system, and restoration of correct engine operation in accordance with BMW standards.