BMW E87 LCI E90 118i 318i Petrol ECU Engine Control Kit N43 DME 7579142 CAS3 Key

BMW E87 LCI E90 118i 318i Petrol ECU Engine Control Kit N43 DME CAS3 Key is a specialized component from the Electronic control modules and ECUs category, designed for BMW petrol systems with a manual transmission. The kit includes the CAS module along with the key, which facilitates matching to the vehicle's installation and allows for efficient operation of comfort functions and start authorization.

Specifications and technical data

• SKU: 7579142-7
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7579142
• Substitutable numbers: 12147599881, 7599881, 12147579142, 7579142, 12147640015, 7640015, 12147621178, 7621178, 5WK93709, 61359147220, 9147220
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the CAS module

The CAS module in BMW 1 Series E87 LCI and 3 Series E90 models with the N43 engine is responsible for managing ignition authorization, key handling, and integration with other electronic modules. Combined with the included key, it forms a coherent set that can be used when replacing a damaged module or during advanced service work in the vehicle's electronics area.

This solution is dedicated to petrol units and works with a manual transmission, which is important when selecting the appropriate controller for a specific drivetrain configuration.

Benefits of using the complete CAS + key kit

Combining the CAS module with the assigned key provides a number of practical advantages in the service process:

• easier matching to the vehicle's installation thanks to the consistency of electronic components,
• possibility of using the kit for repairs of the starting system and security systems,
• reduced risk of communication problems between modules compared to replacing individual components.

For workshops specializing in the BMW brand and for advanced users, this is a functional base for further configuration and programming according to the requirements of a specific car.

Application in petrol vehicles with manual transmission

The presented CAS module is intended for petrol-powered vehicles equipped with a manual transmission. This configuration is important for integration with other control modules, particularly in the area of:

• handling signals related to clutch position and starting,
• communication with modules responsible for the operation of the petrol engine,
• coordination of comfort and security functions within the BMW electronic architecture.

Thanks to this, the module can be used as a replacement part in vehicles with similar specifications, provided that appropriate diagnostic and programming procedures are followed.

Product characteristics and use in service practice

The product comes from the BMW range and belongs to the Electronic control modules and ECUs group, which means it is designed to work with the factory electrical architecture of the vehicle. The used nature of the item makes it a cost-effective solution while allowing for the preservation of the original logic of electronic systems.

In service practice, the CAS kit with key can be used, among other things, for:

• repairs after damage to the module responsible for starting,
• problems with key recognition or ignition authorization,
• upgrades of the electronic installation within the security system.

Knowledge support and selection of appropriate modules

When working with BMW electronics – including CAS modules, FRM, or engine ECUs – it is crucial to correctly match parts and have knowledge of programming procedures. To better understand the specifics of these systems and safely use dismantled parts, it is worth checking out the guide: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using dismantled parts?.

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