BMW E81 E87 LCI E90 N43 118i 318i Petrol ECU Kit DME 7595179 CAS3 + Key

BMW E81 E87 LCI E90 N43 118i 318i Petrol ECU Kit DME CAS3 + Key is a complete set of electronic components designed for the engine management system and start authorization system in selected BMW 1 and 3 Series models. The kit includes the DME controller, CAS3 module, and key, which facilitates fitting to a car with a manual transmission and allows for consistent management of the powertrain electronics. This is a solution for users who want to restore the proper operation of the N43 unit and the vehicle's starting system while maintaining factory operating logic.

Specifications and technical data

• SKU: 7595179-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7595179
• Substitutable numbers: 12147595179, 7595179, 12147599881, 7599881, 12147640015, 7640015, 12147621178, 7621178, 5WK93727, 61359147226, 9147226, KZ, 12147593666, 7593666
• Fuel type: Petrol
• Category: ECUs & Computer Modules

Purpose and function of the kit

The presented control kit is dedicated to BMW 1 Series E81/E87 LCI and 3 Series E90 models with the N43 petrol engine in 118i and 318i versions, equipped with a manual transmission. Combining the DME controller with the CAS3 module and a matched key ensures consistent management of the immobilizer, ignition, and engine operating parameters. This makes it possible to restore proper communication between the engine electronics and the vehicle's security system.

Electronic control modules and controllers – role in the powertrain

The product belongs to the Electronic control modules and controllers category, meaning it is responsible for processing sensor signals, controlling fuel injection, ignition, and interacting with other vehicle systems. In the case of the N43 petrol unit, a properly functioning DME controller is crucial for:

• stable operation at idle and under load,
• control of fuel dosage and ignition timing,
• cooperation with OBD diagnostic systems,
• integration with the CAS3 module responsible for key authorization. Combining these elements into one kit reduces the risk of incompatibility between individual modules and facilitates the adaptation process in the vehicle.

Benefits of using the complete DME + CAS3 + key kit

Using a complete control kit brings a number of practical benefits for the user and the workshop:

• Electronic consistency – the engine controller, CAS3 module, and key are linked, which simplifies the configuration of the security system.
• Reduction of immobilizer problems – the risk of errors related to key recognition and start authorization is reduced.
• Support for the petrol engine – the kit is prepared to work with a petrol fuel supply system, which allows for maintaining the correct engine operating maps.
• Possibility to restore factory operating parameters – a properly selected control module helps to recreate the driving characteristics intended by the manufacturer.

Condition, fitment, and assembly aspects

The component comes from the BMW group and is intended for vehicles of this brand, which helps maintain compliance with the factory electrical installation and the vehicle's communication network architecture. As a used part, it is a cost-effective solution for drivers and workshops that want to restore the efficiency of the control system without having to invest in a new set of electronics. Installation should be carried out by a specialized service, taking into account the procedures for programming and adaptation to a specific vehicle.

Expansion of the control system in BMW

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 control modules, auxiliary controllers, or related electronic units, check the available parts in the BMW electronic control modules and controllers category.

How to safely select a used controller for your car

When selecting used control modules, it is crucial to pay attention to compatibility with the specific engine version, fuel type, and vehicle electronics architecture. It is worth using OEM markings and interchangeable numbers to confirm compatibility with your vehicle. Additional tips on the professional selection of used electronic components can be found in the guide on how to professionally select used car parts, saving time and nerves. For those interested in maintaining the character of premium brands and the conscious use of original components, an interesting addition to your knowledge may be the article on how used parts help maintain the Audi brand DNA, which shows the importance of properly selected modules and equipment elements in other high-end cars as well.