Held five times a year, the days are designed to reduce the number of number plates stolen by securing them with one-way screws.
After the success of previous days, Neighbourhood Watch co-ordinator Len Wills hopes this time will be better again.
"We swapped screws on more than 100 cars last time," Len said.
"I've purchased about 3000 screws so we're hoping we'll help a lot more people."
Although the team has been in action for a few years now, the thefts haven't let up.
"People are getting tools and other things stolen, plates are just the half of it," he said.
"All the burnt out cars that have appeared in the paper recently seem to have all their plates stolen, so the problem isn't going away.
"We're encouraging people to lock it or loose it."
The Safe Plate Day will be held in the Echuca Bunnings car park from 9am until 2pm, but times may vary.
"We always start a bit earlier and we're happy to stay around later if we can make sure we help as many people as possible," Len said.
The Echuca West Neighbourhood Watch is always welcoming new volunteers. If you’re interested, contact Mr Wills on 5480 1083.