BMW E90 E91 LCI N47N 320ed 320d ed 163HP ECU KIT DDE 8510829 CAS3 + Keys Manual

BMW E90 E91 LCI N47N 320ed 320d ed 163HP ECU KIT DDE CAS3 + Keys Manual is a set from the Electronic control modules and controllers category, designed for the security and ignition system in facelifted BMW 3 Series models. The set includes the CAS control unit along with the key, which facilitates matching to the vehicle and reduces the risk of immobilizer-related issues.

Specifications and technical data

• SKU: 8510829-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8510829
• Substitutable numbers: 13618519671, 8519671, 13618518272, 8518272, 13618515081, 8515081, 13618512291, 8512291, 13618506566, 8506566, 13618510829, 8510829, 61359237047, 9237047, 0281017024, 0 281 017 024
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the CAS set with key

The presented set is a component of the electronic security system, responsible for key authorization, immobilizer operation, and communication with other controllers in the vehicle. In the event of a factory CAS module failure or engine starting problems, such a set allows for a technically consistent restoration of the system's functionality.

Combining the CAS unit with a matched key facilitates the work of an automotive electrician or technician – it minimizes the need for deep software intervention and shortens diagnostic time. This is a practical solution when replacing a damaged controller in vehicles with the N47N engine in the 320ed version.

Compatibility and role in the control system

The CAS set with key is intended for vehicles equipped with a manual transmission, which is important when selecting the appropriate controller for a specific vehicle configuration. The module works with other controllers in the vehicle, being responsible for, among other things:

• key recognition and ignition authorization,
• communication with the immobilizer,
• cooperation with other electronic control modules,
• handling comfort functions associated with the vehicle access and starting system.

Thanks to this set, it is possible to restore proper communication within the controller network, which has a direct impact on vehicle stability and operational safety.

Product characteristics and advantages of use

The item comes from the BMW range, which means maintaining the factory electronic architecture and compatibility with the original vehicle installation. Using an original module with a key allows you to:

• maintain the consistency of the security system with the rest of the car's electronics,
• reduce adaptation problems compared to universal solutions,
• maintain predictable vehicle behavior after repair.

The product is offered as used, which is a cost-effective solution for electronics repairs in older BMW 3 Series models, while maintaining the manufacturer's original specifications.

Professional installation and service aspects

Due to the connection with the immobilizer and other controllers, the installation of the CAS set with key should be performed by a specialist in automotive electronics. In practice, the following is often required:

• controller network diagnostics before installation,
• proper configuration or adaptation of the module to the specific vehicle,
• verification of the correct operation of all functions related to ignition and security.

This approach helps avoid secondary faults and ensures stable system operation after replacement.

Expanding the BMW control system

If you are planning a comprehensive repair or upgrade of the control electronics area in your BMW and need other components from the same group, such as comfort controllers, engine modules, or body units, check the available parts in the BMW electronic control modules and controllers category.

If you are interested in how original modules and electronic components influence the behavior of a premium brand and how used parts can help maintain the car's character, it is worth reading the article on our blog: Audi and emotions in their purest form – how used parts help maintain the brand's DNA.