Have you heard the news? Our engineers have worked hard to unlock SFD support in the Carista OBD2 app, thanks to our official partnership with Volkswagen Group (VAG). Exclusively with our EVO Bluetooth Scanner, we now offer SFD protection unlock for specific 2020+ VW Group vehicles, including VW, Audi, SEAT, and Skoda. In this blog post, we will delve into what SFD is and why it's used.
What is SFD?
SFD, (Schutz Fahrzeug Diagnose) or Vehicle Diagnostics Protection, is a security protocol developed by Volkswagen Group. It aims to enhance the security of vehicle data during diagnostics. This new procedure was implemented to replace the outdated method of using a 5-digit login code to access vehicle diagnostics, which no longer meets modern security standards. This sophisticated system ensures that only approved and authenticated diagnostic tools can communicate with the vehicle's electronic control units (ECUs).
Why Does VW Group Use SFD?
The SFD procedure started with the launch of the MQB Evo platform in 2020. This platform includes the Golf 8, Audi A3 Mk4, SEAT León Mk4, Škoda Octavia Mk4, Volkswagen Caddy Mk4, and other models. It is focused on the following:
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Prevent Unauthorized Modifications: With the increasing connectivity of modern vehicles, protecting sensitive information and preventing unauthorized access has become a top priority for automakers.
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Protect Intellectual Property: The software and algorithms used in ECUs are proprietary. By securing these components, VW Group protects its intellectual property from being copied or reverse-engineered.
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Ensure Compliance with Regulations: Many regions have strict regulations regarding vehicle emissions and safety. SFD helps ensure that vehicles remain compliant with these standards throughout their lifespan.
Why Do You Need a Carista EVO OBD2 Scanner?
SFD protection can be unlocked only with an authorized third-party diagnostic tool, which can be achieved only with our advanced EVO scanner. Wondering what makes the Carista EVO scanner better than the Carista OBD diagnostic tool? Have a look at the key differences:
1. Vehicle Protocols Supported:
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Carista OBD: Supports the HS-CAN protocol, which is standard in many modern vehicles.
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Carista EVO: Expands on this with support for HS-CAN, MS-CAN, and SW-CAN (GMLAN) protocols, making it compatible with a wider range of vehicles and providing more comprehensive diagnostics.
2. Special Features:
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Carista OBD: Advanced diagnostics and customization functions
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Carista EVO: Includes the ability to unlock VW Group's SFD protection, offering deeper access and control over certain VW vehicles.
3. Connectivity:
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Carista OBD: Uses Bluetooth 5.0 for wireless connectivity, ensuring a stable connection for diagnostics.
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Carista EVO: Upgrades to Bluetooth 5.1, providing faster data transfer speeds and a more reliable connection.
4. Processing Power:
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Carista OBD: Equipped with an 8-bit processor, sufficient for basic diagnostic tasks.
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Carista EVO: Features a 32-bit ARM processor, delivering significantly more processing power for faster and more efficient diagnostics.
5. Power Management:
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Carista OBD: Does NOT include a power-saving mode.
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Carista EVO: Comes with a battery-saver sleep mode, conserving battery life when the device is not in use.
6. ELM Standards:
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Carista OBD: Follows the ELM327 v1.4b standard, ensuring broad compatibility with various OBD-II apps.
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Carista EVO: Adheres to the newer ELM327 v2.2 and ELM329 standards, offering enhanced performance and compatibility.

How To Unlock SFD with Carista?
*Customizations with SFD protection can only be modified if you have the Carista EVO Scanner. If you don't have the EVO Scanner, you can only change non-SFD-protected settings. Due to security reasons and partnership regulations, you need to perform a couple of steps and set up two-factor authentication to unlock SFD settings.
What Do You Need?
- Carista EVO OBD2 Scanner: Our cutting-edge premium OBD2 EVO scanner unlocks SFD-settings for your car.
- Carista App: Ensure you have the latest version of the Carista app installed on your mobile device from the App Store or Google Play.
- 2FA Authentication App: You must download a 2FA authentication app, such as Google Authenticator, Authy, Microsoft Authenticator, etc.
Please take a look at our dedicated tutorial on How to unlock SFD?
Conclusion
The Carista EVO Scanner is a game-changer for anyone looking to unlock the full potential of their VW Group vehicle. With exclusive SFD protection support, faster processing, and a broader range of protocol compatibility, the Carista EVO sets a new standard in automotive diagnostic tools. It is easy to use and offers great functionality, making it a must-have tool for your toolkit.
*Disclaimer: The information provided in this article is intended for educational and informational purposes only and should not be considered as professional advice. While we strive to provide accurate and up-to-date content regarding OBD2 tools, diagnostics, and related automotive issues, the specifics of each vehicle may vary.
*Always consult your vehicle’s manufacturer guidelines and consider seeking professional assistance when dealing with complex or critical diagnostic issues.




