My son has a car loan through a finance company that he has fallen behind in repaying and due to sporadic employment doesn't look like he will be able to repay. What are his options?

First port of call would be the lender as most will have a provision for hardship. Ask what the "payout figure" is as it may be worthwhile considering what the car is worth v what he owes in order to consider a sale and downsize.

https://s3-ap-southeast-2.amazonaws.com/sai-answer/answers/58bcf93f36a21.m4a