Audi A6 C7 2.0 TDI DDDA 190HP Engine ECU Kit BCM2R + Key 04L906021HA Automatic

Audi A6 C7 2.0 TDI DDDA 190HP Engine ECU Kit BCM2R + Key is a complete engine control set designed for diesel units with an automatic transmission. It includes an Engine Control Unit along with a BCM2R module and a matched key, which facilitates integration with the vehicle's electronics and allows for efficient powertrain repair.

Specifications and technical data

• SKU: 04L906021HA-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L906021HA
• Substitutable numbers: 04L906021HA, 04L 906 021 HA, 04L907309AA, 04L 907 309 AA, 0281033073, 0 281 033 073, 4H0907064HN, 4H0 907 064 HN
• Fuel type: Diesel
• Gearbox type: Automatic
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Application of the ECU kit in the Audi A6 C7 2.0 TDI

The presented engine control unit kit has been developed for diesel engines in the Audi A6 C7 generation, specifically the 2.0 TDI version with 190 HP and the DDDA engine code. Integration with the automatic transmission ensures proper cooperation with the factory vehicle software, which is crucial when replacing a damaged controller or the complete engine electronics.

Combining the ECU with the BCM2R module and the key allows for maintaining the consistency of the immobilizer and comfort systems, which limits the need for additional modifications to the electrical installation. As a result, this kit is particularly useful for repairs following a controller failure, CAN network communication issues, or when replacing the entire electronics set after a collision.

Construction and function of the engine control kit

The kit includes an Engine Control Unit, responsible for managing the operation of the diesel engine, fuel dosing, boost control, and cooperation with onboard systems. The BCM2R module handles communication with the key and other body electronics components, ensuring correct start authorization.

Such a combination of elements in one set simplifies the adaptation process in the vehicle, as the key, BCM2R, and ECU are factory-synchronized. For workshops specializing in Audi electronics, this means shorter diagnostic times, fewer potential software conflicts, and the ability to restore full powertrain functionality more quickly.

Benefits of using a used ECU kit

A used engine control kit for the Audi A6 C7 2.0 TDI is a solution that allows for significantly lower repair costs compared to purchasing new components. At the same time, the original electronics architecture is preserved, which promotes stable engine operation and proper cooperation with the automatic transmission.

The main advantages of this solution include:

• the ability to restore vehicle functionality after an ECU failure or immobilizer issues,
• preservation of the factory diesel engine control logic,
• easier integration with the existing electrical installation,
• cost-effectiveness when repairing older Audi A6 C7 models.

Audi electronic control modules and controllers – expansion and service

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as additional controllers, comfort modules, or engine management systems, check out the available parts in the Audi electronic control modules and controllers category.

When working with vehicle electronics, it is worth using the experience of other users and specialists. For example, in the case of premium brands such as BMW, similar issues regarding engine controllers and comfort modules have been discussed in an article dedicated to iDrive systems and FRM modules – you can find more practical tips in the material Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models.

Summary

Audi A6 C7 2.0 TDI DDDA 190HP Engine ECU Kit BCM2R + Key is a practical engine electronics set designed for diesel units working with an automatic transmission. Combining the engine controller, BCM2R module, and key in one set simplifies the repair process, shortens adaptation time, and allows for the effective restoration of full powertrain functionality in the Audi A6 C7.