Car in parking space

Is the garage his own personal space, or is it common area?

If it's his garage, the most you can probably do is go after him for damaging adjacent space that he doesn't own personally. Or if your CC&Rs prohibit keeping hazardous materials inside homes, you may have some leverage.

If the garage is common area, then the association can make reasonable rules about what's allowed, and many CC&Rs state that inoperable vehicles may not be parked on common area. If your community is a tow-away zone and you have the proper signage posted, you may be able to tow the car. (The association has to be careful with towing - they can't just decide to do it one day.)

The real problem is getting the owner's attention. Monetary penalties are probably worthless since he's not paying assessments, and fines also have to be allowed by your CC&Rs and a fining schedule published ahead of time. Fines *may* be worth doing if your state and CC&Rs treat fines as assessments, allow you to lien the property for non-payment of fines, and to foreclose for non-payment.

If the car is parked in the common area, then the association has the right to have it cited and then towed. If is their property and the garage is enclosed with a garage door, then no, it does not have the right.

An HOA in California cannot lien a property for unpaid fines or violations. It can record a lien on unpaid assessments, as long as proper California procedure is followed.