The original Transformers cartoons had Bumblebee as a VW Beetle. The Michael Bay movies partnered with GM to be a marketing platform for Chevy (and specifically the Camaro), but they did stay true to his colors. Several of the characters were "modernized" for the movies (Starscream, Ratchet, Jazz, Barricade, Hound, and obviously Optimus Prime)
The first Transformers had both a 1987 Camaro as well as a 2007 concept car designed to be the reveal of the Camaro's return to production after being discontinued in 2002. Had both Shia Lebouf and Megan Fox.
Both Lebouf and Fox were in Transformers 2 (Revenge of the Fallen) as well. - This is the version of Bumblebee that my Camaro most closely resembles. Was based on the 2010 production car and was also supposed to be the reveal of the Z28, but that didn't happen as planned (long story but basically GM didn't own the "Z-28" badging at the time).
They got rid of Fox and switched to the British blond in the 3rd (Dark of the Moon) because Fox and Michael Bay couldn't get along. - The stripes on Bee were changed from the traditional Rally stripes and they added a high-wing spoiler, but was basically a 2012 production car with some cosmetic upgrades.
The 4th one (Age of Extinction) is where the whole human cast is replaced with Mark Wahlberg and his constantly crying teenage daughter. Had both a 1970 resto-mod Camaro and a semi-concept version of the 6th Gen Camaro.
I have only seen the 5th one (The Last Knight) once. Only returning human was Mark Wahlberg. It was hands down the worst of the series and Michael Bay got fired from the franchise (at least as director). Bumblebee was a production 6th Gen Camaro with a body kit. The part that bugged me the most was how Michael Bay made the main transformers characters disposable and only focused on 3-4 main ones. This isn't a George RR Martin series...
Then the newest BumbleBee movie has a combo of both his OG VW Beetle versions as well as his futuristic animated series car. It's a prequel to the original Transformers movie and includes a lot of the back story that was glossed over in the 2007 film.
We watched the Bumblebee movie after New Years. Thought it was a good movie. I'd put it in line with the first one. Decent story, a lot of nostalgia (especially if you watched the cartoons in the 80's), and I enjoyed the fact that they brought back the "double changers" (Transformers who had 2 different vehicle modes).