BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 8507136 CAS3 + Key

BMW 330d N57 245 HP Engine Control Kit is a professional set including ECU DDE with CAS3 module and key, designed for BMW 3 Series E90, E91 LCI, and E92 models with diesel engines. The kit comes from a diesel-powered vehicle, making it a cohesive solution for Diesel units and facilitating the restoration of full powertrain functionality after an electronic failure.

Specifications and technical data

• SKU: 8507136-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8507136
• Substitutable numbers: 13618510221 8510221, 13618506086 13618506377 13617823973, 13617823513 13618506444 13618507136, 8506086 8506377 7823973, 7823513 8506444 8507136, 0281016285, 0 281 016 285, 61359147226, 9147226, KZ
• Fuel type: Diesel
• Category: ECUs & Computer Modules

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

The presented set is an item from the Electronic Control Modules and Controllers category, comprising the DDE engine computer along with the CAS3 module and a matching key. This complete package allows for the transfer of full engine control logic and start authorization to another vehicle, without the need for time-consuming programming from scratch.

For BMW N57 diesel engines with 245 HP, a correctly selected ECU set with an immobilizer is crucial for:

• stable engine operation across the full load range,
• proper injection and boost control,
• maintaining factory protection strategies for the Diesel unit,
• trouble-free starting due to the synchronization of DDE, CAS3, and the key.

Benefits of Using a Complete Used Set

Using a complete, used engine controller set with the CAS3 module and key is a practical solution for serious electronic failures or immobilizer damage. This type of set allows you to:

• reduce vehicle downtime thanks to the ready-made control configuration,
• minimize costs compared to purchasing new components,
• maintain communication consistency within the vehicle's bus system,
• facilitate workshop work during adaptation to a specific BMW unit.

An additional advantage is the ability to verify compatibility by part numbers and interchangeable numbers, which increases the chances of correct matching to a specific equipment and software version.

Selection by Numbers and Compatibility with Diesel Units

For BMW engine electronics, matching the DDE controller to the specific Diesel unit version and vehicle configuration is particularly important. This set offers:

• the possibility of precise selection by OEM part number,
• support for multiple interchangeable numbers within the same controller family,
• retention of operating parameters characteristic of the N57 245 HP engine.

This allows the workshop or user to consciously verify compatibility with their car, reducing the risk of problems with CAN network communication, starting errors, or incorrect operation of engine accessories.

Condition, Service Application, and Installation

The set comes from the aftermarket, making it an attractive service solution for vehicles where the engine controller or CAS3 module has been damaged. A used ECU DDE + CAS3 + key set is particularly useful in situations where:

• the original controller has suffered electronic damage,
• there have been problems with the immobilizer and key authorization,
• the entire control set needs replacement after flooding or a wiring short circuit.

Professional installation should include checking the electrical system, computer diagnostics after startup, and potential parameter adaptation to the specific vehicle unit.

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, engine management modules, or diagnostic support systems, check the available parts in the BMW Electronic Control Modules and Controllers category.

How to Safely Buy Used Engine Electronics

When purchasing a used ECU DDE set with CAS3 module and key, it is worth paying attention to compatibility by numbers, origin history, and proper functioning in the previous vehicle. Support from a specialized guide on electronics selection may also be helpful.

If you want to learn more about how to consciously choose used engine controllers and sensors, how to check hardware and software compatibility, and what to look for during installation, read the article: Used Automotive Electronics – How to Safely Select Second-Hand ECU Modules and Sensors.