The rise of connected trucks is not only changing how vehicles operate, but also how you buy them. In the past, your focus was mainly on mileage, maintenance, and technical condition. Today, software, data, and cybersecurity play an increasingly important role, especially when buying used trucks. With the introduction of UNECE R155 and R156, this has become a reality. These regulations require manufacturers to structurally manage cybersecurity and software updates. This has a direct impact on you as a fleet buyer. In this buyer’s guide, we clearly explain what UNECE R155 and UNECE R156 mean in practice. No complex technical story, but practical insights that help you make better decisions when purchasing trucks.
Cybersecurity may sound like something for the IT department. Still, it is highly relevant for buyers of trucks. The reason is simple: the value and usability of a truck are no longer defined by hardware alone.
Software and data are becoming more important. With the introduction of UNECE R155 and UNECE R156, cybersecurity and update management are no longer optional, but a structural part of every truck. This means that as a buyer, you do not only assess what a truck can do today, but also whether it will remain safe, up to date, and fully functional in the future. A vehicle that no longer receives updates or has limited access to systems and data can lose value faster. It may also bring operational risks or even become unusable in certain markets.
At the same time, dependence on manufacturers and their systems plays a key role. Think of telematics, software updates, and access to vehicle data. If you do not consider this during purchase, you risk running into limitations that only become visible later. That is why it is essential to include these regulations in your buying process and look beyond the technical condition of the truck.
UNECE R155 and UNECE R156 are European regulations addressing the digitalisation of vehicles, but they focus on different areas.
R155 is about cybersecurity. It defines how manufacturers protect vehicles against cyber threats throughout the entire lifecycle.
R156 focuses on software updates. It covers how updates are carried out safely, in a controlled way, and with clear traceability.
CSMS and SUMS mainly show how well a manufacturer has organised its processes.
A Cyber Security Management System (CSMS) means a manufacturer actively monitors risks, analyses threats, and takes action to protect trucks. It goes beyond technology. It is a continuous process of detection, prevention, and response.
A Software Update Management System (SUMS) means software updates are performed in a structured and controlled way. This includes clear update procedures, validation of updates, and insight into which software version is running on a truck.
For you as a buyer, this translates into practical questions: does the vehicle still receive updates, how are they carried out, and is it clear what has been changed?
Without a solid CSMS and SUMS, you risk buying a truck that becomes outdated or vulnerable.
There are still many misunderstandings about these regulations. UNECE R155 and R156 do not mean that every vehicle is automatically fully secure or will always receive updates. The rules require manufacturers to organise processes, but they do not guarantee unlimited support.
It also does not mean that you, as the owner, have no responsibilities. In some cases, you are responsible for installing or approving updates. Missing updates can affect functionality or even warranty.
Finally, not all vehicles offer the same level of access to data and systems. Manufacturers still define how their ecosystems are structured.
When buying used trucks, the focus shifts from just physical condition to the full digital history of the vehicle.
Where you previously focused on maintenance records and wear, it is now just as important to understand software updates, cybersecurity status, and access to systems and data.
With UNECE R155 and R156, it is not only about whether a truck is well maintained, but also whether it has been properly updated, whether all updates have been completed, and whether it is still within the manufacturer’s support cycle.
This is especially important for used trucks. You depend on how the previous owner handled updates and systems. Missing updates, limited telematics access, or unclear data ownership can lead to operational limitations later on. Think of extra costs or even loss of value.
As a buyer, you are not only evaluating the past of a truck, but also its future readiness.
With connected trucks, it is important to look beyond the technical condition. This checklist helps you ask the right questions and avoid surprises later.
Always ask how the update policy is organised and how long support is guaranteed.
For example:
Connected vehicles continuously generate data. The key question is who has access and under which conditions.
Important questions:
Insight into the digital history of a truck is becoming increasingly important.
Ask:
Not every risk is visible when buying a used truck. Especially in software, updates, and data, issues can remain hidden until you start using the vehicle.
Watch for these signals:
Rule of thumb: if you do not have a clear and complete view of software, updates, and data, you are effectively buying part of the truck blindly.
Looking for a truck that is not only technically reliable, but also digitally future-proof? At BAS World, you will find a wide range of used trucks, presented in a clear and transparent way so you know exactly what to expect. Discover our current stock of used trucks or contact one of our experts for personal advice.
