BMW 1 3 Series E87 E90 116i 316i N45 Petrol ECU Kit DME 7557809 CAS2 + Key

BMW 1 3 Series E87 E90 116i 316i N45 Petrol ECU Kit DME CAS2 + Key is a practical solution for workshops and users looking for a proven set for BMW petrol vehicles. The kit belongs to the Electronic control modules and ECUs group, which ensures component consistency and facilitates the restoration of proper powertrain operation after a failure or engine replacement.

Specifications and technical data

• SKU: 7557809-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7557809
• Substitutable numbers: 12147568427, 7568427, 0261209085, 12147557809, 7557809, 61356943771, 6943771
• Fuel type: Petrol
• Category: ECUs & Computer Modules

Application and function of the ECU DME + CAS2 + Key kit

The presented kit includes the DME engine control unit, the CAS2 module, and a matched key, prepared for operation with the N45 unit in petrol-powered BMW 1 Series (E87) and 3 Series (E90) models. This kit allows for maintaining consistency between the engine electronics, the immobilizer system, and the starting system, which is crucial when replacing a damaged controller or performing engine swaps.

Since the components come from a single vehicle, the risk of synchronization issues, bus communication errors, and the need for time-consuming adaptation of multiple modules simultaneously is minimized.

Benefits of using a complete control kit

Choosing a complete ECU DME kit with a CAS2 module and key in the Electronic control modules and ECUs segment brings a number of practical assembly and service benefits:

• data consistency between the engine controller, comfort/immobilizer module, and key,
• reduced need for programming the entire security system from scratch,
• decreased risk of software conflicts and starting errors,
• easier diagnostics after installation – the modules are already matched to each other,
• possibility of effective vehicle repair after damage to the original ECU or CAS.

A kit configured in this way is particularly useful in situations where the original controller has been severely damaged, flooded, or has suffered memory issues, as well as when replacing an engine within the same family of units.

Technical characteristics and compatibility

The kit is intended for BMW vehicles with an N45 petrol engine, which is important when selecting the appropriate software to control the powertrain. Using a dedicated kit for a petrol engine ensures correct ignition control, fuel metering, and cooperation with sensors and equipment characteristic of this design.

Before purchasing, it is recommended to verify compatibility by OEM number or interchangeable numbers and to compare the vehicle configuration (year, trim level, engine type) with technical data. This helps reduce the risk of hardware or software incompatibility and shortens the time required for adaptation in the vehicle.

Condition, origin, and use in service practice

The offered kit comes from a BMW vehicle and is classified as a used part, making it an attractive cost-effective alternative to new controllers available at authorized dealerships. In workshop practice, such a solution allows for the economical repair of vehicles where the cost of a new ECU DME including programming would be disproportionately high relative to the car's value.

The ECU DME + CAS2 + Key kit will prove useful both in professional services specializing in the BMW brand and in independent workshops dealing with automotive electronics, diagnostics, and engine control system repairs.

Selection of used electronics and technical support

When choosing a used control kit, it is worth paying attention to hardware compatibility, software versions, and correct matching to the specific vehicle configuration. A detailed discussion of the principles of selection, compatibility verification, and practical aspects of installation can be found in the Global Parts guide: Used automotive electronics – how to safely select second-hand ECU modules and sensors. This is a helpful source of knowledge for mechanics and users who want to consciously use used electronic modules.

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