Mercedes W169 W245 A200 B200 CDI OM640.941 140HP Engine ECU Kit A6401501091 Key

Mercedes W169 W245 A200 B200 CDI OM640.941 140HP Engine ECU Kit is a complete engine control unit set with a key, designed for A-Class and B-Class models equipped with the OM640.941 diesel engine. The set belongs to the Electronic control modules and controllers category, which ensures component compatibility and facilitates integration with the vehicle's factory electrical system. This is a practical solution for workshops and users looking for a proven, used ECU set for professional powertrain repair.

Specifications and technical data

• SKU: A6401501091-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6401501091
• Substitutable numbers: A6401501091, A 640 150 10 91, 0281013557, 0 281 013 557, A1695451708, A 169 545 17 08, KZ
• Category: ECUs & Computer Modules

Purpose and function of the ECU kit

The presented engine control unit set with a key is dedicated to Mercedes A-Class W169 and B-Class W245 vehicles in A200 CDI and B200 CDI versions with 140 HP. Using a single, matched set of electronic components allows for maintaining compliance with the factory security system and the operating logic of the OM640.941 engine unit. As a result, the injection system, boost control, and other engine functions can operate in a predictable and stable manner.

Benefits of using a complete kit

Using a complete ECU kit with a key instead of a single controller significantly simplifies the service process. In practice, this means:

• minimizing the need for programming and adaptation in the vehicle,
• consistency of electronic components within a single system,
• easier diagnostics during subsequent inspections,
• reducing the risk of conflicts between the engine controller and the immobilizer.

For workshops specializing in the Mercedes brand, such a set is a convenient, technically organized solution that allows for shorter repair times and maintains a predictable vehicle startup process after controller replacement.

Application in service practice

The complete ECU kit with a key is particularly useful in situations where the original controller has been damaged, there are communication problems in the vehicle network, or failed programming attempts have occurred. Replacing it with a matched set from the same model group allows for restoring proper engine operation without the need for deep software interference. This solution is frequently chosen by independent service centers that prioritize repeatable, proven repair procedures.

Characteristics of the used product

The offered set comes from the Electronic control modules and controllers category and is a used item, which allows for combining reasonable costs with maintaining the original manufacturer's specifications. Such OEM components are valued for their factory fitment to the electrical system and predictable behavior during long-term operation. For many users and workshops, this is a rational choice when repairing older A-Class and B-Class models.

Expanding the control system in a Mercedes

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as additional controllers, engine management modules, or related electronic systems, check out the available parts in the Mercedes electronic control modules and controllers category.

Technical support and parts selection

When working with advanced vehicle electronics, it is worth using reliable sources of knowledge. To compare manufacturer approaches and the cost-effectiveness of using dismantled components, you can refer to the article New or used? A comparison of costs and quality of car parts, which helps in consciously choosing a service strategy based on budget and expected durability.

Additionally, if you are interested in the broader context of control module operation in modern cars and want to better understand issues related to diagnostics and controller replacement, it is worth reading the blog post Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using dismantled parts?, which discusses practical aspects of working with vehicle electronics using another brand as an example, while remaining in a similar technical area.