BMW E82 125i Petrol N52N ECU Engine Control ECU Kit 7602220 5WK91142 Key CAS3

BMW E82 125i Petrol N52N ECU Engine Control ECU Kit is a set consisting of an ECU module, a CAS3 module, and a key, designed for petrol engines. This solution allows for a consistent replacement of control electronics in the drivetrain area, ensuring component compatibility and stable system operation. With this kit, you can perform a professional engine electronics repair without the need to source individual modules separately.

Specifications and technical data

• SKU: 7602220-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7602220
• Substitutable numbers: 12147602220, 7602220, 5WK91142, 61359217853, 9217853
• Fuel type: Petrol
• Category: ECUs & Computer Modules

Purpose and function of the ECU with CAS3 kit

The offered set is an item from the Electronic control modules and controllers category, designed to work with the N52N petrol engine in the BMW 1 Series E82 125i model. The kit includes an ECU engine controller, a CAS3 module responsible for ignition authorization, and a matched key, which allows for maintaining the consistency of the immobilizer system and powertrain control.

A kit configured in this way allows for the restoration of the original powertrain operating logic, facilitates diagnostics, and reduces the risk of communication issues between individual modules in the vehicle.

Benefits of using a complete control kit

Using a complete ECU + CAS3 + key kit in a BMW E82 125i with a petrol engine offers a number of practical advantages:

• consistency of the electronics responsible for ignition and engine control,
• minimized risk of software conflicts between modules,
• easier adaptation in the vehicle compared to selecting individual components,
• possibility to restore proper system operation after an original controller failure.

For workshops and users, this means a more predictable repair process and greater control over the final result. The complete control kit is particularly beneficial for more serious engine electronics faults, where replacing the ECU alone may prove insufficient.

Technical characteristics and compatibility

The presented kit is intended for an engine powered by petrol, which is crucial when selecting a controller for a specific powertrain. The set should always be matched to the specific vehicle configuration, taking into account the engine version and vehicle equipment.

The components included in the kit have an assigned OEM part number and associated interchangeable numbers, which facilitates verification of compatibility with a specific BMW unit. Before purchasing, it is worth comparing the markings with the vehicle data or seeking professional assistance to ensure full hardware and software compatibility.

Condition, origin, and service application

The offered set comes from the original BMW production line and is a used product, which allows for an economical vehicle repair while maintaining performance characteristics close to factory standards. This type of solution is particularly attractive for older models, where the cost of new electronic components is disproportionately high relative to the car's value.

The ECU kit with CAS3 and key will work well both in professional services specializing in the BMW brand and in independent workshops that carry out advanced engine electronics repairs. A used control module is a reasonable compromise between cost and functionality, provided it is correctly selected and installed.

Substantive support and additional resources

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

When selecting a used engine controller, CAS3 module, and key, understanding hardware and software compatibility is key. A detailed discussion of these issues, along with practical tips on selection by OEM number, HW/SW compatibility, and the installation process, can be found in the article: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Summary

BMW E82 125i ECU kit with CAS3 module and key is a practical solution for users and workshops that want to restore the efficiency of the engine control system in the N52N petrol unit. The complete electronics configuration facilitates the repair process, reduces the risk of immobilizer and inter-module communication issues, and allows for maintaining operating characteristics consistent with the manufacturer's specifications. This is a conscious choice for those looking for a technically correct, yet economical way to solve engine electronics problems in the BMW 1 Series E82.