They are among several featured deals posted on manufacturers' websites in advance of the holiday.
Buyers can snap up a 2016 Jetta with zero-percent financing for 60 months, plus up to $1,500 cash back during Volkswagen's Model Year End Event.
The 2016 Optima is available with zero-percent financing for 66 months, plus $1,000 bonus cash or $2,000 cash back as part of Kia's Top Quality Sales Event.
The Jeep Labor Day Sales Event includes the 2016 Jeep Grand Cherokee, which is available with zero-percent financing for 60 months and $500 bonus cash.
Most deals end on September 6.
"It wasn't exactly a blockbuster month in August, so that puts extra pressure on the industry to step up its game in September, especially this coming Labor Day weekend," said Jessica Caldwell, Edmunds.com director of industry analysis. "We're at a critical time where dealers need to clear out 2016 inventory to make room for 2017s, and that's good news for shoppers who will see some great deals on outgoing models in the coming weeks."
Edmunds says: Dealers need to make room for 2017 models, so this weekend is a great time for car shopping.