[thombat]

Generally having fewer than four wheels reduces stability while not offering compensating substantial advantages (https://en.wikipedia.org/wiki/Three-wheeler#Configurations). And more than four disjoint wheels means adding further axles and coping with the problem that on a bumpy road a wheel pair may entirely lose contact with the road.

As for headlights, a single central one would still be notably face-like given widely spaced turning indicators. And having two headlights gives redundancy: "one-eyed monsters" at night are preferable to cars lacking any lights.