For the first time in his 37 years working at New Jersey car dealerships, Larry Kull had to rent extra space to store unsold new Honda vehicles -- one of the latest signs that the record U.S. auto market is cooling.

Across dealer lots in America, inventory is piling up as automakers produce more cars than are being bought. Dealers had about 85 days worth of cars and trucks on hand at the beginning of February -- about 22 days more than at the beginning of 2017 and eight days more than a year earlier, according to Automotive News Data Center.

“The sales are good, I just have more product on the ground than I’ve had before,” said Kull, who has about 60 days of passenger cars including Civic compacts and Accord sedans stocked at an office parking lot down the road from his Honda store in Marlton, N.J.. He prefers to have just 45 days worth of cars on hand.