Sales dropped 5 percent year over year in April, ending a streak of strong sales that propelled Q1 2018 to an all-time high.
March sales came in at 1.65 million units, the highest sales total in over a year.
February sales fell by 2.4% from a year ago, an anticipated drop as the market cools from record sales levels posted the last few years.
10.4 million used vehicles were sold in Q2 2018, a 2.5 percent increase over Q2 2017.
Edmunds takes a midyear look at the major factors influencing the industry in 2018.
A total of 10.6 million used vehicles were sold in Q1 2018, a 1.5 percent increase from Q1 2017.