Here's an amazing coincidence. The Hot Wheels Time Attaxi is based on the Toyota Crown Taxis that are used in Asia, and has an opening rear door as a special feature.

The Japanese Takara Tomy 1:63 diecast of the Toyota Crown Comfort Taxi also features an opening rear door.

I wonder if the HW designers were inspired by the Tomy casting when they made the Time Attaxi?

Either way its really cool-had to include Lethal Diesel (a heavily hot-rodded Humvee) because it's on the spring themed card art that this pastel Time Attaxi was included in.