What is firewall of car?

As an AI language model, I do not have access to information about firewall of car. However, a car's firewall is a software or hardware system designed to protect the electronic components of the vehicle from cyber-attacks or unauthorized access. This firewall acts as a barrier between the car's internal computer system and the external network, providing safeguarding from malicious software, viruses, and unauthorized users. The firewall of a car is critical for ensuring the safe operation of the vehicle, and many car manufacturers are working to develop advanced firewall technologies to secure the next generation of connected cars.