State Sen. Jeffrey Klein is leading state and city officials in calling for a crackdown on illegal car sales in New York City.

Klein's office says undercover investigators were able to record multiple instances of the crime on Bronx streets.

Klein says the practice of selling stolen or damaged vehicles on public streets is called "curbstoning." Vehicle identification numbers used to track the cars and trucks are often untraceable and could have been defaced or faked.

"We don't even know if someone who thinks they're getting a steal is actually getting a stolen car," Klein says.

The fine for curbstoning is currently $1,000, according to Klein's office.

A bill to increase it to $4,000 is awaiting approval from Gov. Andrew Cuomo.