BMW 1 3 Series E87 E90 E91 120i 320i N46 ECU Kit DME CAS2 Key 7545042 Automatic

BMW 1 3 Series E87 E90 E91 120i 320i N46 ECU Kit DME CAS2 Key is a solution designed for workshops and users who want to efficiently restore the full functionality of engine control electronics. The kit belongs to the Computers and Controllers group and is matched to BMW 120i and 320i models, which facilitates the selection of appropriate components for drivetrain repairs.

Specifications and technical data

• SKU: 7545042-6
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7545042
• Substitutable numbers: 12147552177 12147552176 12147550535, 12147550534 12147545043 12147545042, 12147531846, 7552177 7552176 7550535 7550534 754504 75450423, 7531846, 12147557291, 7557291, 61356943759, 6943759, 0261208540, 0 261 208 540
• Gearbox type: Automatic
• Category: Control Modules

Purpose and compatibility

The presented control kit is dedicated to the BMW 1 Series E87 and 3 Series E90/E91 with the N46 engine in 120i and 320i versions equipped with an automatic transmission. Using a complete ECU DME package, CAS2 module, and key allows for maintaining the consistency of the vehicle's electronics, which is crucial when replacing the controller in modern gasoline units.

This type of solution is particularly useful in situations where the original controller has been damaged, communication problems occur in the data bus, or difficulties with start authorization arise. The kit is configured for an automatic transmission, allowing it to work better with shift logic and security systems in these drivetrain versions.

Construction of the BMW 1 3 Series E87 E90 E91 120i 320i N46 ECU Kit DME CAS2 Key

The offered solution includes the DME engine controller, the CAS2 module responsible for start authorization, and a key matched to this set. Such a configuration minimizes the risk of synchronization problems between the controller, immobilizer, and start system, which in practice shortens the time of diagnostics and installation.

Thanks to the use of original BMW components, the factory communication architecture in the vehicle is maintained, and the N46 engine control system can operate within the parameters specified by the manufacturer. This is especially important for vehicles equipped with an automatic transmission, where the engine controller works with many comfort and safety modules.

Application in diagnostics and repairs

The BMW 1 3 Series E87 E90 E91 120i 320i N46 ECU Kit DME CAS2 Key works well both for standard replacement of a damaged controller and in more advanced service projects, such as:

• restoring the efficiency of the starting system after an electronics failure,
• solving communication problems between the engine controller and the CAS2 module,
• restoring the proper operation of the N46 engine after installation damage or flooding of the controller,
• replacing a faulty kit in vehicles with an automatic transmission.

For workshops specializing in the BMW brand, such a set is a practical service tool, allowing for faster confirmation of the diagnosis and reducing costs associated with programming from scratch.

Benefits of choosing an original used kit

Choosing a used, original control kit for a BMW allows you to combine reasonable repair costs with maintaining high-quality components. BMW Computers and Controllers from dismantling often come from vehicles in good technical condition, which makes them an attractive alternative to new parts, especially for older generations of E87, E90, and E91 models.

If you want to better understand when it is worth choosing used automotive electronics and how to safely select an engine controller, comfort module, or sensors, check out the guide: Second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. You will find practical tips there that will help you make an informed choice of parts.

Additionally, you can familiarize yourself with the analysis of trends in the premium car parts market in the article why used original components for BMW are becoming an increasingly popular choice, which will allow you to better assess the profitability of such an investment in the long term.

Expanding repairs in the area of BMW electronics

If you are planning a comprehensive repair or modernization of the control electronics area in your BMW and need other elements from the same group, such as additional control modules, engine controllers, or engine management systems, check the available parts in the category BMW Computers and Controllers.