A video shared on social media showed Phoenix sitting in a toy car while the vehicles drove past and the drivers waved at the birthday boy.
Phoenix's parents told Reuters their son loves Jeeps and that lots of people in their neighbourhood drive the distinctive sports utility vehicles.
"I looked to our neighbourhood Facebook page to ask if any Jeep owners could alert me to area Jeep meetups so I could bring my son around the time of his birthday", the boy's mother said.
"One neighbour, who we had never even met, immediately made an event page and organised a Jeep parade to come by our house on his birthday. Lots of Jeeps showed up. Some even made signs and brought him small toy Jeeps as gifts," she added.