BMW 3 Series E90 320si 173HP DME 7560955 Petrol N45 ECU Kit CAS2 + Key Manual

BMW 3 Series E90 320si 173HP DME Petrol N45 ECU Kit CAS2 + Key Manual is a complete N45 petrol engine control kit designed for manual transmission versions. The kit includes the DME controller along with the CAS2 module and a matched key, which facilitates professional engine electronics replacement without the need for time-consuming programming from scratch. It is a practical solution for workshops and users who need a consistent, factory-spec control package.

Specifications and technical data

• SKU: 7560955-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7560955
• Substitutable numbers: 12147560956, 7560956, 12147560955, 7560955, 0261201108, 0 261 201 108, 61356943791, 6943791
• Fuel type: Petrol
• Gearbox type: Manual
• Category: Control Modules

Application and function of the ECU kit with CAS2

The presented kit from the Computers and Controllers category is designed to support the N45 petrol unit in the BMW 3 Series E90 320si model with 173 HP, paired with a manual transmission. The combination of the DME controller with the CAS2 module and key ensures consistent management of engine operation, the immobilizer, and start authorization, which is crucial for the stability and safety of the drivetrain.

By maintaining compatibility between the engine controller and the CAS2 module, the kit allows for the restoration of the original system operating logic, minimizing the risk of software conflicts and vehicle starting issues after replacing the electronics.

Benefits of using a complete DME + CAS2 + key kit

Choosing a complete controller kit with a CAS2 module and key brings a number of practical benefits in daily service work and advanced repairs:

• consistency of components responsible for starting and vehicle security,
• reduction in the scope of coding and adaptation compared to replacing individual modules,
• easier diagnostics in case of previous problems with the immobilizer or communication between modules,
• the ability to restore proper engine operation after the original controller is damaged.

For workshops specializing in the BMW brand, such a kit provides a convenient base for further configuration, and for the end user, it means a more predictable repair process.

Technical characteristics regarding the engine and transmission

The kit is intended for a petrol engine, which means that the injection maps, ignition timing, and operating strategies are adapted to the specifics of the N45 unit. The DME controller works with equipment typical for this design, ensuring proper control of the mixture, ignition, and auxiliary engine systems.

Adaptation for a manual transmission is important for torque control logic, gear shift cut-off functions, and cooperation with onboard systems. As a result, the control system is matched to the driving characteristics of the manual version, which translates into predictable vehicle behavior after installing the kit.

Condition, origin, and installation aspects

The components included in the kit are sourced from dismantling and have a used status, which is important when planning a repair budget and selecting spare parts. For many E90 series vehicles, especially in specialized workshops, used control electronics represent a rational alternative to new components, allowing the vehicle to be kept in full working order at controlled costs.

Before installation, a standard diagnostic procedure and verification of the vehicle's equipment compatibility with the kit configuration are recommended. Professional installation and any necessary software matching should be performed by a service center with experience in working with BMW electronics, which limits the risk of communication errors between modules.

Selection and compatibility based on part numbers

Due to the specifics of BMW electronics, when selecting this kit, it is crucial to compare the OEM part number and available interchangeable numbers with the vehicle data. In the product description and the specification section, you will find information that allows you to verify compatibility with a specific BMW 3 Series E90 320si configuration.

To avoid mistakes, it is worth using the VIN and the vehicle's service documentation. In case of doubt, a good solution is to consult with a workshop specializing in the BMW brand or the store's technical department, which will facilitate the selection of the correct controller and CAS2 kit.

If you are planning a comprehensive repair or upgrade of the engine electronics area in your BMW and need other components from the same group, such as engine controllers, CAS modules, or other control units, check the available parts in the BMW Computers and Controllers category.

If you are considering using a used engine controller kit, CAS2 module, and key and want to better understand when such a solution is technically justified, the article Second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors? will be helpful, where you will find practical tips on selecting and operating used automotive electronics.