BMW E81 E87 E90 LCI 120d 320d N47 ECU Kit DDE 8510591 CAS3 + Key Automatic

The BMW E81 E87 E90 LCI 120d 320d N47 Control Unit Kit is a complete set from the electronic control modules and units category, designed for modern N47 diesel engines in 1 and 3 Series models. This kit provides a solid foundation for professional engine control system repairs in BMW vehicles equipped with automatic transmissions, enabling the restoration of proper drivetrain operation and related electronic system functions.

Specifications and technical data

• SKU: 8510591-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8510591
• Substitutable numbers: 13618512498, 8512498, 13617812538, 7812538, 13618506437, 8506437, 13618510591, 8510591, 13617823421, 7823421, 13618506374, 8506374, 13617823420, 7823420, 13618506438, 8506438, 0281016924, 0 281 016 924, 61359226238, 9226238
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Intended Use and Application in BMW Models

The presented control unit kit is dedicated to BMW 1 Series E81/E87 and 3 Series E90 LCI vehicles with N47 engines in the 120d and 320d variants. The module's design has been developed to meet the requirements of advanced diesel engines with sophisticated injection systems, ensuring proper engine operating parameter management, stable running characteristics, and adequate dynamics while maintaining exhaust emission control.

This solution is suitable for repairs following control unit failure as well as for situations requiring the replacement of the complete control kit in vehicles subjected to intensive use, such as fleets or cars with high mileage.

Technical Characteristics of the Control Unit Kit

The kit belongs to the electronic control modules and units category, meaning it is responsible for key engine management functions and interaction with other vehicle systems. The module is prepared for cooperation with an automatic transmission, which is crucial for proper communication with the gear shifting system, traction control system, and driving comfort functions.

In practice, this includes, among others:

• correct synchronization of engine torque with automatic transmission operation,
• consistent operation of safety and stability control systems,
• the ability to maintain factory drivetrain characteristics after proper matching and configuration.

Benefits of Using an Original BMW Control Unit

The control unit kit comes from the BMW line, which ensures factory-level compatibility with the vehicle's electrical system and communication network architecture. This means:

• compatibility with BMW diagnostic and service software is maintained,
• no modifications to wiring harnesses or connector adaptations are required,
• the risk of communication errors between modules is reduced compared to random aftermarket replacements.

For the user, this translates to a more predictable repair process, shorter vehicle downtime, and the ability to maintain a factory-like configuration. This is particularly important for modern diesel engines, where the engine control unit interacts with numerous other modules responsible for comfort, safety, and diagnostics.

Condition, Verification, and Preparation for Installation

The product is a used part, allowing for cost optimization while maintaining the original manufacturer's specifications. Before installation, the standard service procedure is recommended: checking the vehicle's electrical system, verifying stored errors in other modules, and planning the appropriate coding or adaptation procedure according to BMW guidelines.

Due to the complexity of the N47 engine control system, installation in a specialized workshop with appropriate diagnostic software and experience in working with BMW control modules is recommended.

More About BMW Electronic Control Modules

If you are looking for other BMW electronic control modules and units for your car, check out our dedicated category: BMW electronic control modules and units. You will find a wide selection of modules tailored to different series and generations of vehicles.

When planning repairs of electronic systems in the 3 or 5 Series, it is worth familiarizing yourself with practical tips for working with used modules. A detailed discussion of the topic 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?, which describes, among other things, the approach to engine control units and other key modules.

If you are considering the choice between a used part and an aftermarket replacement, the guide: 5 Reasons Why a Used OEM Part is a Better Choice Than an Aftermarket Replacement may also be helpful, as it simply explains when an original used part will be the most rational solution.