BMW E90 E91 E92 E93 LCI 330i N53 272HP ECU DME Kit CAS3 Key 7612455 Manual

BMW E90 E91 E92 E93 LCI 330i N53 272HP ECU DME Kit CAS3 Key is a complete, used control unit set designed for the 272 HP N53 engine in LCI versions of the 3 Series. This professional Engine Control Unit is matched to a petrol engine paired with a manual transmission, ensuring proper management of the powertrain's operation. Thanks to its factory architecture, the controller allows for the preservation of original engine performance parameters and stable communication with the vehicle's electrical system.

Specifications and technical data

• SKU: 7612455-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7612455
• Substitutable numbers: 12147612455, 7612455, DME MSD81, 5WK93750, 61359237047, 9237047
• Fuel type: Petrol
• Gearbox type: Manual
• ECU type: Engine Control Unit
• Category: Control Modules

Purpose and compatibility

The presented engine computer set is dedicated to BMW 3 Series models of the E90, E91, E92, and E93 generations after the facelift (LCI) in the 330i version with the N53 engine. The controller's design is prepared for use with a petrol powertrain and a manual transmission, which is crucial for the correct selection of the component for a specific vehicle configuration. Using the appropriate ECU in this powertrain ensures the maintenance of correct injection maps, ignition timing, and engine component operation logic.

Function and role of the engine computer

As an Engine Control Unit, the set is responsible for comprehensive control of the N53 unit – from fuel dosage and ignition timing to monitoring the operation of sensors and actuators. A correctly selected controller:

• coordinates the cooperation between the petrol engine and the manual transmission,
• ensures stable operating parameters across the full load range,
• supports the maintenance of factory performance and engine refinement,
• enables proper diagnostics via factory communication protocols. For workshops and users, this means the ability to restore the efficiency of the engine control system while maintaining compliance with the vehicle's original configuration.

Application in service and diagnostics

This engine computer set from the Computers and Controllers category is particularly useful for repairs related to factory ECU damage, communication problems within the vehicle network, or errors in controlling the N53 unit. Replacing it with a properly selected used controller allows for reduced service costs while maintaining high functionality and compatibility with the car's electrical installation. In workshop practice, such a set is often used as a solution for failures that cannot be resolved through programming or electronics repair alone.

Characteristics of the used ECU set

The offered product is a used component, which, in the case of BMW electronics, allows for the economical restoration of vehicle efficiency while maintaining the original specification. The set has assigned part numbers and interchangeable numbers, which facilitates clear identification and selection for a specific engine and equipment variant. For correct installation and configuration, it is recommended to work with a service center experienced in programming BMW controllers to ensure proper matching with the immobilizer and other modules in the vehicle. 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, engine management modules, or powertrain control systems, check the available parts in the BMW Computers and Controllers category.

Support in choosing a used controller

When purchasing a used ECU, it is crucial to pay attention to the compatibility of numbers, fuel type, transmission type, and the type of controller used. Proper selection helps avoid problems with starting the engine, errors in communication with other modules, and the need for costly installation modifications. To better understand when choosing a used engine computer is justified and how to safely carry out such a replacement, it is worth reading the guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors? Additional tips regarding the safe purchase of used electronic components, including engine controllers, can also be found in a practical online guide: Safe purchase of used car parts online – a step-by-step guide, which discusses, among other things, selection by OEM numbers and verification of the seller and the condition of the part.