I was driving a HOTDOG_D4. I jumped over a ramp and I fell next to a barricade. My car started burning at damage level %17 but cops fired my car after this and my car's damage level increased to %41. I save this image at damage level %41. I'm still at shock!
Vehicles can be 99% damaged with no fire if water puts out the fire. I'm not sure how to set them on fire at a low percent damage but it should be possible if you damage it in the right location and the right damage type.