Tuning the fendt 939

2023 Fendt 900 Vario

939 Vario – 9.0L – MAN Engine


Bosch EDC17CV42 ECU

The Challenge

ECU tuning isn’t exclusive to older models; even the latest ones can benefit from adjustments. In this blog post, we explore how tuning the Fendt 939 can enhance your agricultural operations. ECU tuning involves modifying settings in the ECU to boost power and torque, optimizing the tractor’s performance.

The 2023 Fendt 939, part of the 900 Vario series, comes equipped with modern technology. Investing in newer models with advanced features is costly, making it crucial to maximize their potential. Alt Tune focuses on optimizing the 9.0L MAN engine under the Fendt 939’s hood, enhancing your investment without the need for aftermarket parts. ECU tuning also allows us to optimize the emission system for increased reliability and reduced issues.

The Solution

Tuning an ECU for optimal performance while maintaining safety is a complex task. It requires expertise in both ECU systems and the specific tractor, considering the owner’s requirements and working environment. Alt Tune custom-tunes each machine to ensure the best results. With our custom tune, your Fendt 939 will experience a boost in horsepower and torque, improving ground speed and towing capacity for enhanced productivity. Optimizing the engine also leads to better fuel consumption, saving you money on fuel costs. For a secure tuning process, we use Alientech KESS3 to flash the tune.

Emission systems are notorious for causing time-consuming and costly issues, which is undesirable for a new tractor. We have therefore created an emission system solution. This solution is working through adjustments to the ECU settings. This solution enhances the reliability of your Fendt 939, protecting you from unnecessary mechanical expenses.

Increased Power


Power Increase


Torque Increase

Further Benefits Of ECU Tuning The Fendt 939

Increased Power and Torque

With more power and torque, a tuned tractor can handle heavier loads and perform tasks more efficiently. It allows the tractor to pull or push larger implements, haul heavier loads, and complete tasks faster, resulting in increased productivity.

Years of Development

We have been tuning Fendt 900 Vario 9.0L MAN engine for years, and understand how they work as well as the limitation on factory hardware.


Easy and fast programming

Easy, fast and non-evasive via programming the factory-fitted diagnostic port.

So, if you’re looking to take your Fendt tractor to the next level, don’t hesitate to reach out to us! Our dedicated team is ready to unleash the full potential of your vehicle and make your driving dreams a reality!


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