* If you're thinking of the latest "Transformers" film, "Rise of the Beasts" (2023), the most prominent new red Autobot is Mirage, a Porsche 911 who is also a master of illusions and disguises.
* If you're thinking about a red Autobot who's *relatively* new to the live-action franchise, it might be Arcee. She's a motorcycle Autobot who debuted in "Transformers: Revenge of the Fallen" (2009). While not strictly "new" compared to the original film's Autobots, she's been a more recurring character since then.
To give you a more definitive answer, I need more context. Could you tell me:
* What Transformers movie are you thinking of?
* What kind of red Autobot are you looking for? (A car, a truck, a motorcycle, etc.)
* Do you remember any specific details about them? (Like their name, their role in the movie, etc.)
This will help me pinpoint the red Autobot you're asking about.