BMW E90 E91 LCI E92 325d Diesel N57 204HP ECU Engine Kit DDE 8510221 CAS3 + Key

BMW E90 E91 LCI E92 ECU Controller Key Cas Set is a complete, used package of electronic components designed for BMW 3 Series models with a Diesel engine. The set includes the ECU engine controller and the CAS module with key, facilitating a professional replacement of the control system without the need for tedious matching of individual components. This is a practical solution for workshops and users looking for a proven, original control system.

Specifications and technical data

• SKU: 8510221-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8510221
• Substitutable numbers: 13618510221 8510221, 13618506086 13618506377 13617823973, 13617823513 13618506444 13618507136, 8506086 8506377 7823973, 7823513 8506444 8507136, 0281016838, 0 281 016 838, 61359226238, 9226238, KZ
• Fuel type: Diesel
• Category: ECUs & Computer Modules

Set Purpose and Function

The presented set from the Electronic Control Modules and Controllers category is designed to work with BMW diesel-powered units. The combination of the ECU controller with the CAS module and key allows for maintaining the consistency of the security system and engine control logic, which is particularly important in modern BMW designs.

In practice, this means that with proper configuration and adaptation in the vehicle, repair time can be significantly reduced compared to selecting and programming individual components. The set is particularly useful for:

• replacing a damaged engine controller in BMW 3 Series E90, E91 LCI, E92 models with a diesel engine,
• resolving vehicle starting problems resulting from inconsistencies between the ECU and the CAS module,
• professional electronics repairs in specialized BMW service centers.

Benefits of Using a Complete ECU + CAS + Key Set

Using a complete control set in the BMW 3 Series offers a range of practical service and user benefits:

• Immobilizer System Consistency – The ECU, CAS, and key come from a single system, simplifying vehicle security configuration.
• Reduced Risk of Communication Errors between electronic modules, which is common when mixing different controllers.
• Simplified Diagnostics Process – Easier tracing of faults related to starting and diesel engine operation.
• Possibility to use the set as a base for further programming for a specific car instance.

For workshops specializing in the BMW brand, such a set is a convenient solution that allows for optimizing work time and increasing the predictability of repair outcomes.

Technical Characteristics in the Context of Diesel Engines

The control system used in this set is prepared to work with BMW Diesel units, meaning it supports advanced injection strategies, boost control, and exhaust gas treatment systems typical for this engine family. The ECU controller manages, among other things, fuel delivery, rail pressure, auxiliary component operation, and communication with other vehicle modules, while the CAS is responsible for start authorization and key integration.

This combination is crucial for stable engine operation, correct functioning of comfort features, and maintaining factory anti-theft security. The correct selection of the set for a specific engine version and vehicle year should always be confirmed based on technical data and part numbers in the specifications.

Condition, Origin, and Application in Service Practice

The set is used, which in practice means it comes from a dismantled vehicle and has been verified for its suitability for further use. Such OEM parts are often chosen by workshops that prioritize original solutions while optimizing repair costs. Combined with appropriate diagnostics and programming, this allows for effective repair of the engine control system in the BMW 3 Series.

Before installation, it is recommended to:

• verify the set's compatibility with the specific vehicle version based on technical data,
• perform full computer diagnostics after installation,
• entrust adaptation and potential coding to a specialized service center.

Related Products and Technical Knowledge

If you are looking for other BMW Electronic Control Modules and Controllers, check out the BMW Electronic Control Modules and Controllers available in our store to select components tailored to your car's specific model and configuration.

More practical information on operating and repairing electronics in BMWs can be found in the article: Years of Driving Pleasure – How to Care for iDrive Systems and Electronic Modules in BMW 3 and 5 Series Models Using Used Parts?. This is a valuable source of knowledge for those who want to consciously use used electronic modules and controllers in their cars.

Summary

The BMW E90 E91 LCI E92 ECU Controller Key Cas Set is a practical solution for service centers and users looking for a complete diesel engine control system for the BMW 3 Series. The combination of the ECU controller, CAS module, and key in one set simplifies the repair process, enhances the consistency of the security system, and allows for professional restoration of the vehicle's full functionality while maintaining the operational characteristics typical of factory BMW solutions.