Why CarPro-Tec Deliberately Avoids CAN-Bus Integration

Imagine you've just bought a new car and want to protect it in the best possible way. Many people immediately think of modern CAN bus alarm systems. These systems sound great on paper: they are directly connected to the vehicle's electronics and are supposed to be particularly secure. But in practice, things often look different. High costs, complicated installation, and technical problems make them far from the best option. That is precisely why CarPro-Tec relies on a solution without CAN bus. In this article, you will find out the advantages and disadvantages of both approaches and which option best suits your needs.

Key Insights

• CAN bus alarm systems are often expensive, complex, and require installation at a certified workshop. Furthermore, they are not completely secure and have vulnerabilities that can be exploited by hackers.
• Technical issues such as software conflicts and unexpected repair costs are widespread.
• Once installed, these systems are often difficult to remove or adjust. When changing vehicles, transferring the system can be problematic.
• Leading manufacturers are unable to integrate certain vehicles (such as the current Ford Transit) or require months of advance notice for such requests.
• Without CAN bus integration, CarPro-Tec avoids many of the typical pitfalls. The true plug-and-play solution from CarPro-Tec is adaptable, easy to install, and flexible.

What is a CAN bus alarm system and why does it seem reasonable?

A CAN bus alarm system is a security system that is directly integrated into a vehicle's CAN bus network. The CAN bus is a communication system that connects the various control units of a car. The idea behind a CAN bus alarm system is to provide better protection for the vehicle through direct access to this network. At least in theory.

Theoretical Advantages vs. Practical Disadvantages

At first glance, a CAN bus alarm system seems to offer many advantages . Theoretically, it can seamlessly communicate with the vehicle's existing systems and provide comprehensive monitoring, provided it is installed and configured correctly.

• Seamless Integration: The alarm system communicates directly with the vehicle's electronics, monitoring all relevant systems without gaps. This allows it to accurately read data such as door status, ignition, window position, and trunk monitoring, enabling comprehensive and precise surveillance.
• Advanced Features: CAN bus alarm systems access the vehicle's electronics directly and read precise data such as door status, ignition position, window, and trunk positioning. This deep integration enables comprehensive monitoring that goes far beyond classic sensors.
• Immobilizer: Many modern CAN bus alarm systems offer the ability to remotely disable the vehicle – for example, by blocking the ignition or fuel system. This is a significant advantage, as a thief will not be able to start or drive the car once it has been disabled.
• Discrete Installation: Integration into the existing vehicle architecture makes the system inconspicuous and harder for thieves to detect, as it is installed under the interior paneling.

However, there are also significant practical disadvantages, and this is where theory meets lived reality. Here are just a few examples, which we will examine in more detail:

• Installation is complicated and requires expert knowledge, which drives up costs. You cannot avoid a specialized, certified workshop and will likely need to visit it more than once.
• These systems are often prone to malfunctions, which can lead to expensive repairs. There is also the risk of software conflicts that can cause malfunctions in the vehicle.
• In warranty cases vehicle manufacturers sometimes argue that the CAN bus has been “tampered with” – and suddenly your warranty claims are void. Therefore, it is crucial to ensure that your workshop has the necessary certification from the vehicle manufacturer. You will have to research this yourself as a non-expert.
• Legal restrictions on remote shutdown: Some features, such as remotely shutting down the vehicle, are heavily regulated within the EU.

Shutting down the vehicle while driving can be dangerous and pose a traffic hazard. That’s why most systems are programmed to disable the vehicle only when stationary or with the engine off. So, if the thief simply drives straight to their “trusted workshop”, it won’t help you.

Not convinced? You can view the official and legally binding version of UN Regulation No. 162 in the “Official Journal of the European Union” here: UN/ECE Status Document TRANS/WP.29/343.

High Costs & Installation Effort

Why the high effort for hardware and professional installation?

A CAN bus alarm system is not just a device you buy and install. For effective vehicle security in a camper, it requires professional installation, which can often only be done in specialized workshops. This not only incurs labor costs but also potential customization and calibration expenses. These additional costs can quickly exceed the original hardware costs. This is particularly frustrating if you want to start your Easter vacation on time or spontaneously at the beginning of the season. Not to mention the effort of securing a workshop appointment in the first place.

Why are CAN bus alarm systems so expensive?

Installing a CAN bus system can be very costly. The hardware costs are already high because these systems must be specifically developed for communication with vehicle electronics. In addition, there are extra costs for individual software adjustments to ensure compatibility with your vehicle's specific protocols. If you choose this solution, you will often have to invest several thousand euros and a lot of time before you can even get started!

Not convinced? You don’t have to take our word for it. Check out this example on YouTube, and you’ll quickly see the calculation (as this is in German, you can auto-translate the subtitles via YouTube):

The total costs may vary depending on your individual needs. Here is a detailed overview from the video example, based on current market prices:

Vehicle Type	Estimated Costs
Standard Camper	€2,750 – €3,100
Fully Integrated Camper	€2,800 – €3,500

Basic Installation:

The system costs approximately €2,300 including VAT in this video example, covering both materials and installation.

Additional Features:

1. GPS SIM Card
   €100.00 – €120.00 for two years, depending on the provider. In this example, there are no monthly fees.
2. Ultrasonic Sensor
   €150.00 for the sensor, which is installed inside the vehicle to detect movement.
3. Additional DMS Sensors:
   €100.00 for each additional sensor. The system in the example includes five sensors as standard, but depending on the vehicle type, additional sensors are often necessary.

As you can see, with a few extra features, costs add up faster than expected – and then there might be hidden costs that only become apparent later. Let’s get into that next.

Technical Issues & Hidden Risks

A CAN bus system must be correctly integrated into the existing vehicle network. The integration is complex and carries hidden risks. Since there are many different vehicle models and brands, each with different installation requirements, even a small mistake can have significant effects on functionality and safety. Many users report problems that only appear after installation, such as inexplicable warning lights or system failures. Imagine activating the alarm system, and suddenly your radio no longer responds. Since the CAN bus is the central nervous system of your vehicle, even small errors can impact numerous other systems. And you cannot simply go to the nearest workshop spontaneously; you have to return to the certified specialist.

Some manufacturers struggle to integrate vehicles like the Ford Transit – or it takes forever. A pity, since this transporter model is very popular among campers due to its easy conversion. The risk of requiring subsequent adjustments or repairs is relatively high.

Typical problems that can occur:

• Software conflicts leading to malfunctions
• False alarms caused by incorrect sensor reactions due to improper installation
• Complete system failures requiring reinstallation

The range of errors is relatively large, from malfunctions such as unresponsive devices to complete system failures, which can be costly to fix. In worse cases, the entire vehicle ecosystem can be crippled, or constant false alarms triggered. This is particularly frustrating when you are trying to prepare for a relaxing vacation.

These hidden costs are rarely communicated in advance, so a CAN bus alarm system can quickly turn into a bottomless pit. You invest a lot of money in installation, only to later realize that maintenance costs exceed your budget.

What many do not know: In warranty cases, vehicle manufacturers may claim that work was done on the CAN bus system – and suddenly, your warranty claims are void.

"Especially with popular camper base vehicles like the Ford Transit, a common problem becomes apparent: Many manufacturers take forever to make their systems compatible – or fail to do so at all. As a result, campers often face long waiting times or subsequent modifications. With CarPro-Tec, this problem is completely eliminated: Our solution is immediately ready for use, without complicated integration or workshop visits."

Is a CAN bus alarm system actually hacker-proof?

The answer is complex and depends on the specific implementation and security measures taken. Fact is: Even a CAN bus alarm system is not completely secure and has vulnerabilities that hackers can exploit. It was originally developed for internal vehicle communication, without a major focus on cybersecurity. Many buyers assume that a CAN bus alarm system makes their vehicle more secure. But paradoxically, it can actually make it easier for hackers. If an attacker gains access to a single cable, they can manipulate the system – turning the CAN bus into a weakness rather than a shield.

With the increasing connectivity of modern vehicles (e.g., Wi-Fi, Bluetooth, telematics services), new attack surfaces are emerging. Many providers claim otherwise – of course, they want to sell – but guaranteed protection against access does not exist.

How does a hacker get into a CAN bus system?

1. Physical access (OBD-II port): The most direct access is through the OBD-II interface, located in most vehicles in the driver's footwell. With a laptop or a specialized OBD diagnostic device, hackers can inject commands into the CAN bus system.
2. Insecure wireless interfaces: Modern vehicles are often equipped with Bluetooth, Wi-Fi, or mobile telematics systems. Vulnerabilities in these systems can allow hackers to gain remote access and infiltrate the CAN bus network.
3. Manipulated third-party devices: Accessories such as dashcams, infotainment systems, or even retrofitted alarm systems connected to the CAN bus can be security gaps. If these devices are insufficiently secured, they can quickly serve as entry points.

The attacker does not even have to be a professional; many of the necessary tools can now be easily ordered from China, doing the work for them.

Lack of Flexibility – Once Installed, Always Bound

Another issue is the lack of flexibility of these systems. Once installed, they are difficult to remove or transfer to another vehicle. While transferring a CAN bus alarm system to a new vehicle is technically possible, it is often complicated and challenging.

For customers, this essentially means that when changing vehicles, they often have to buy a new system or first go through the labor-intensive process of disassembling the old vehicle. Naturally, they have to return – you guessed it – to the certified specialist workshop. Additionally, it is unclear whether the alarm system retains its warranty when removed and reinstalled in a new vehicle. Financially, it will likely not be worthwhile, and buying a new system will be easier. And so, the adventure of retrofitting an alarm system for my camper begins all over again.

The Alternative: CarPro-Tec

In contrast, CarPro-Tec offers a simpler solution: a car alarm system without CAN bus integration that can be effortlessly transferred from one vehicle to another – perfect for the flexible theft protection of motorhomes and campers. This not only saves time and money but also 100% guarantees the warranty of your vehicle in all cases.

CarPro-Tec is not just an alarm system but a comprehensive, pre-configured security system that adapts flexibly to your needs. You simply place it in your vehicle, log in to the Fusion App with your smartphone, and receive instant notifications in case of an alarm – without complex wiring, without software integration, and, most importantly, without hidden costs or SIM card subscriptions. With additional upgrade options such as gas, heat, smoke, and water detectors, CarPro-Tec provides complete and reliable protection for your vehicle. You can expand it with additional features at any time without needing to visit a workshop again.

"With CarPro-Tec, you can secure your vehicle quickly, cost-effectively, and easily, without worrying about hidden costs or technical complications. If you need help, our support team is always available for free assistance."

Conclusion: Why CarPro-Tec is the Better Choice

While CAN bus alarm systems may seem convincing at first glance due to their direct integration into vehicle electronics, several weaknesses become apparent in practice. High costs, complex installations, and the risk of software conflicts or hacker attacks make these systems an uncertain investment. Additionally, potential warranty issues and a lack of flexibility when changing vehicles pose challenges. Retrofitting upgrades is also difficult in practice. The decision to forgo CAN bus integration may initially seem unusual or like a cost-saving measure – but when you weigh the pros and cons, it quickly becomes clear why CarPro-Tec is the better choice:

• No workshop required – saves time, money, and hassle.
• Easy installation with true plug & play technology that requires no technical expertise.
• 4G/LTE connectivity ensures secure, free app notifications including GPS location sent directly to your smartphone.
• Integrated backup power supply via the built-in battery – ensuring protection even in case of power failure.

CarPro-Tec is flexible, easily transferable, and protects your vehicle without the typical pitfalls of CAN bus systems. For those who value ease of use and reliable security, CarPro-Tec is the ideal solution. This means more time for what really matters – your adventure on the road, without worries about your vehicle’s security!

Frequently Asked Questions (FAQs)

What is a CAN bus alarm system and how does it work?

A CAN bus alarm system is directly connected to the vehicle’s electrical network. The Controller Area Network (CAN bus) links the car’s electronic control units. The alarm system uses this network to monitor the vehicle and trigger an alarm in case of unauthorized access.

How secure is a CAN bus alarm system really?

The short answer: Not as secure as many think. The CAN bus was originally designed for internal vehicle communication – without today’s cybersecurity focus. While many providers market CAN bus alarm systems as the ultimate security solution, the devil is in the details: these systems have vulnerabilities that savvy hackers can exploit.

What costs are associated with installing a CAN bus system?

The costs include expensive hardware and almost always the fees for installation by a technician certified by the vehicle manufacturer. Expect to spend several thousand euros.

Why does CarPro-Tec avoid CAN bus integration?

CarPro-Tec relies on a true plug & play system that requires no complicated installation and avoids software conflicts or workshop costs. The installation is extremely easy, and you can take the system with you anytime.

Does CarPro-Tec work with CAN bus?

CarPro-Tec operates independently of the CAN bus and can simply be placed in the vehicle for security. Retrofitting CAN bus integration is deliberately not possible.

Is CarPro-Tec suitable for all vehicle types?

Yes, CarPro-Tec is versatile and can be used in all vehicle types, including standard cars, motorhomes, and transporters. You can even use it to secure your basement, tool shed, or garage when it’s not in your vehicle.

Why are CAN bus alarm systems difficult to transfer?

If you have installed a CAN bus alarm system in your vehicle and then change vehicles, you face a challenge. Transferring a CAN bus system to a new vehicle is technically possible. However:

• High costs: Removing and reinstalling requires a specialized workshop, adding extra expenses.
• Technical complexity: Each vehicle model has its own CAN bus architecture, meaning the system may not integrate seamlessly into the new vehicle.
• Time-consuming: The process of removal and reinstallation can take time and often requires multiple workshop visits.

What risks exist with using a CAN bus alarm system?

In some cases, disruptions in the CAN bus network can cause critical vehicle functions to fail. In the worst case, the system may completely disable your vehicle – possibly leaving you stranded. Unexpected false alarms or system failures can also reduce convenience and reliability.

Why is CarPro-Tec a good alternative to CAN bus systems?

CarPro-Tec offers a simple, reliable, and flexible security solution without the typical CAN bus problems.

How is CarPro-Tec powered?

CarPro-Tec can be powered via a 5V or 12V power source in the vehicle. Additionally, it has a built-in battery that ensures continued protection even in case of a power failure.

Can I connect CarPro-Tec to any USB-C port?

Yes, CarPro-Tec can be connected to any standard USB-C port that provides at least 5V output voltage. For reliable power during travel, we recommend using vehicle adapters that support 12V as well.