BMW E87 E90 E91 118i 318i N46 ECU Kit DME 7565300 CAS3 + Key Manual

BMW E87 E90 E91 118i 318i N46 ECU Kit DME CAS3 + Key Manual is a factory electronic engine control unit designed for BMW 3 Series E90 models with the N46 engine and manual transmission. This component belongs to the Electronic control modules and controllers category, responsible for precise management of engine operation, fuel delivery, and ignition. A used controller of this type allows for a technically correct repair of the engine management system while maintaining BMW's factory performance characteristics.

Specifications and technical data

• SKU: 7565300-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7565300
• Substitutable numbers: 12147565301, 7565301, 12147565300, 7565300, 0261201160, 61356943830, 6943830
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the DME controller

The engine computer in the BMW E87 E90 E91 118i 318i N46 acts as the central control unit for all key engine operating parameters. Based on sensor signals, the controller calculates, among other things, injection timing, ignition advance angle, and mixture corrections to ensure the engine runs stably across the entire rev range. This preserves the smooth power delivery and predictable throttle response characteristic of BMW. The controller is structurally matched to the N46 engine paired with a manual transmission, which is essential for proper communication with other vehicle modules and for torque management logic during gear changes.

Benefits of using an original BMW module

Using an original engine computer from the Electronic control modules and controllers category allows for maintaining consistency in software and electrical architecture in the BMW E87 E90 E91. In practice, this means:

• factory fitment for the electrical installation and engine wiring harnesses,
• proper cooperation with other controllers in the vehicle,
• stable operation of OBD diagnostic systems,
• possibility of further maintenance in accordance with BMW procedures. A used DME controller is a good solution for repairs where the priority is to maintain original engine control logic while optimizing costs. A properly selected module helps restore correct starting, smooth idle, and predictable vehicle behavior under load.

Selection and installation of the engine computer

When selecting a controller for the BMW E87 E90 E91 118i 318i N46, it is crucial to match it to the specific engine version and manual transmission configuration. In practice, this means paying attention to compatibility with the existing installation, engine accessory type, and the architecture of other modules in the vehicle. The product has an assigned OEM part number and interchangeable numbers, which facilitates compatibility verification in service catalogs and parts selection systems. On the installation side, the controller requires standard workshop procedures, such as proper connector connection, wiring harness condition check, and – depending on the procedure – appropriate programming or adaptation in the vehicle. Correct installation allows for the restoration of full engine control system functionality without interfering with the mechanical aspects of the engine.

Condition and use in repairs

The offered engine computer is a used component, which in the case of electronic controllers often represents a rational choice for maintenance repairs. Modules of this type, sourced from dismantling, are frequently used in situations such as damage from power surges, water ingress, or installation errors, where repairing the existing controller is uneconomical or technically difficult. Using an original BMW controller allows for maintaining the consistency of engine operating parameters with the manufacturer's factory specifications, which is important both from the point of view of engine durability and driving comfort. This solution is particularly valued among users who want to maintain the driving characteristics typical of the 3 Series.

More about BMW electronic modules and related parts

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 engine controllers, comfort modules, or lighting controllers, check the available parts in the BMW electronic control modules and controllers category. If you want to better understand how to care for electronic systems in BMW 3 and 5 Series and how to effectively use engine controllers from dismantling, check out the article: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models. To compare the approach of other premium manufacturers to original electronic parts, you can also read the text: Audi and pure emotion. How do used parts help maintain the brand's DNA?.