Many early Volkswagen Group electric vehicles (EVs) have a significant oversight: they lack a battery preconditioning feature. This affects models like the ID.3, ID.4, ID. Buzz, Skoda Enyaq, and Cupra Born, which don’t utilize the hardware already in place for this function.
When temperatures drop, charging these cars quickly can become a real hassle. The high-voltage battery needs to be at the right temperature for optimal charging. Without the preconditioning, drivers have to wait much longer for their batteries to charge.
Notably, newer models introduced after 2024 have software updates that allow owners to preheat their batteries with just a tap on the screen. But what about the earlier models? There’s a DIY solution created by security engineer Fredrik Gustafsson.
He devised a small circuit board that connects to the car’s battery management system. It’s not too complicated to assemble. For those interested, detailed instructions can be found on his GitHub page. The whole setup costs about $40 to $50, but it requires programming the board and connecting it to the battery management harness behind the glovebox.
However, this isn’t without its quirks. The circuit board needs power from a USB source to activate the battery heater, which feels a bit outdated. Plus, there’s no way to monitor the system’s performance, such as battery temperature or heater status.
Experts like Gustafsson caution that tampering with the battery management system can void warranties. Yet, he assures users that the car has failsafes in place to prevent damage. When the battery reaches the ideal temperature, the heater turns off automatically.
Interestingly, user reactions have been mixed. Some EV owners are enthusiastic about this DIY fix, while others express concerns over the risks involved. Social media discussions reveal that many early EV adopters share tips and experiences, sparking a community around finding solutions for these issues.
Gustafsson is already working on a refined version of this system, incorporating a smartphone app for better control and monitoring. However, he’s still figuring out a reliable way to distribute the parts for the second version, which remains custom-made.
In a world moving toward rapid EV adoption, understanding these quirks is essential for early adopters. As technology evolves, manufacturers need to address these issues to enhance user experience fully. Meanwhile, Gustafsson’s DIY solution offers a stopgap for drivers in need.
For more information, you can also check out discussions on the VWIDTalk forum.
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Volkswagen,Aftermarket \/ Tuning

