BMW 1 3 Series E87 E90 E91 N46 118i 318i ECU Kit DME 7565300 CAS3 Key Manual

BMW 1 3 Series E87 E90 E91 N46 118i 318i ECU Kit DME CAS3 Key Manual is a complete electronic set from the Electronic control modules and ECUs category, designed for BMW 1 and 3 Series vehicles with the N46 engine and manual transmission. The set includes the DME engine control unit, the CAS3 module, and a matched key, which facilitates a consistent configuration of the powertrain and immobilizer system after replacement.

Specifications and technical data

• SKU: 7565300-7
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7565300
• Substitutable numbers: 12147565300, 7565300, 12147565301, 7565301, 61356943834, 6943834, 0261201160
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Application of the ECU DME CAS3 kit with key

The presented set is intended for BMW 1 Series E87 and 3 Series E90/E91 models with the N46 unit in 118i and 318i versions, equipped with a manual transmission. The combination of the DME controller, CAS3 module, and key allows for consistent operation of start functions, security features, and communication with other vehicle systems, which is particularly important when replacing a damaged controller or complete engine electronics.

Construction and function of the kit components

The set includes the DME engine controller responsible for managing the N46 unit, the CAS3 module acting as the central element of the access and start system, and a matched key that works with this module. This configuration facilitates integration with the vehicle's existing electrical installation, minimizing the risk of software conflicts between the engine controller and the immobilizer system.

Combining these components into one package is beneficial for both workshops and individual users, as it reduces the need to search for individual modules and perform subsequent matching. The set provides a coherent service solution for the powertrain and security system in BMW vehicles from the N46 family.

Benefits of using a complete ECU kit

Choosing a complete ECU DME kit with a CAS3 module and key ensures:

• consistency of the electronics responsible for engine control and starting,
• easier adaptation in a vehicle with a manual transmission,
• reduction of time required for diagnostics and programming,
• increased operational predictability of the system after installation.

For workshops specializing in the BMW brand, such a set is a practical solution for repairs after a controller failure, immobilizer problems, or when several electronic components need to be replaced simultaneously. The completeness of the package translates into a more predictable assembly and configuration process.

Product condition and service purpose

The elements included in the set come from the secondary market, which makes them an attractive cost alternative to new OEM components. This type of solution is often chosen for repairing vehicles used on a daily basis, where a reasonable balance between price and functionality is important. The set is particularly useful in situations where not only the engine controller is damaged, but also the CAS3 module, or there are issues with key authorization.

Selection and additional technical information

To correctly select this set for a specific BMW vehicle, it is worth paying attention to the compatibility of the body generation, N46 engine type, and manual transmission configuration. It is also helpful to compare the OEM part number and interchangeable numbers in the product's technical specification. In case of doubt, consultation with an automotive electrician or a diagnostician specializing in the BMW brand, who will assess the scope of necessary adaptation work, will be useful.

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

Substantive support and guides

When choosing a used ECU kit, it is worth familiarizing yourself with practical tips regarding automotive electronics. A helpful article describing when it is worth reaching for secondary market elements and how to assess their suitability for a specific car will be: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. You will find tips there regarding controller selection, condition assessment, and typical installation procedures.

Additional support when buying online can be a step-by-step guide discussing how to verify part compatibility, the importance of the OEM number, and the strategy for safely ordering components over the Internet: Safe purchase of used car parts online – a step-by-step guide. Thanks to this, you will more easily prepare for the purchase and installation of the ECU kit in your BMW.