BMW E87 LCI E90 118i 318i N43 143HP ECU Kit DME 7579142 CAS3 Keys Manual

BMW E87 LCI E90 118i 318i N43 143HP ECU Kit DME CAS3 Keys Manual is a complete set from the Electronic Control Modules and Controllers category, designed for N43 petrol engines with 143 HP and a manual transmission. It includes the DME engine control unit, the CAS3 module, and matched keys, which significantly simplifies the process of replacing control electronics in BMW 1 Series E87 LCI and 3 Series E90 vehicles.

Specifications and technical data

• SKU: 7579142-19
• 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 of the BMW ECU DME CAS3 kit

The presented kit is dedicated to BMW vehicles with the 143 HP N43 petrol engine, paired with a manual transmission. Using a complete ECU DME + CAS3 + keys package allows for maintaining the integrity of the immobilizer system, engine management, and vehicle security, which is particularly important when replacing used electronics.

This type of solution is chosen both in the event of a factory controller failure and during advanced powertrain repairs, where it is necessary to match the entire control set to a specific engine and transmission configuration.

Construction and components of the ECU kit

The kit includes key components responsible for managing the powertrain operation and start authorization:

• DME engine control unit responsible for precise management of the N43 unit,
• CAS3 module acting as the central element of the immobilizer and key authorization system,
• matched keys compatible with the CAS3 module and the DME controller.

This combination of elements minimizes the risk of communication issues between modules and reduces the need for complex programming from scratch, which is a major advantage in workshops specializing in BMW electronics.

Benefits of using a complete DME + CAS3 + keys kit

Using a complete control kit in BMW E87 LCI and E90 cars with the N43 engine brings a number of practical benefits:

• Security system integrity – the DME, CAS3, and keys come from a single set, which facilitates integration with the vehicle's existing installation.
• Reduced installation time – the workshop does not need to select individual modules and match them via software from scratch.
• Higher operational predictability – the complete solution reduces the risk of conflicts between the engine controller and the immobilizer module.
• Possibility of professional adaptation – the kit works well in the hands of specialists dealing with coding and adaptation of BMW electronics.

For users looking for an effective repair of the engine control system in petrol BMW models with a manual transmission, such a kit is a technically sound and functional option.

Characteristics of the used product

The offered set comes from the secondary market, which allows for a favorable cost-to-functionality ratio while maintaining the original BMW specification. A used ECU DME kit with the CAS3 module and keys is particularly attractive in situations where repairing the factory controller is unprofitable or impossible.

Before installation, it is recommended to entrust the assembly and any necessary coding to a service center with experience in working with BMW electronics, which will ensure proper integration with the vehicle's installation and correct operation of all systems related to the engine control unit.

Selection by OEM numbers and technical support

In the case of BMW control electronics, correct selection based on OEM and interchangeable numbers, as well as hardware and software compatibility, is of key importance. To better understand the principles of selecting used controllers, modules, and sensors, it is worth reading the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. The article discusses, among other things, selection by VIN/OEM, HW/SW compatibility issues, and practical installation examples.

Related BMW Electronic Control Modules and Controllers

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as controllers, comfort modules, or additional ECU units, check the available parts in the BMW Electronic Control Modules and Controllers category.