Certified pre-owned sales climbed 7 percent last month and three brands reported best-ever sales, according to Autodata Corp.
The firm, which released industry-wide CPO numbers Friday morning, said in its report there were 237,445 certified sales in May, beating the 221,936 sales a year ago by 7 percent.
Through five months of the year, there have been 1.12 million CPO sales, up 1.6 percent year-over-year.
Cadillac, Mitsubishi and Subaru each posted their best-ever month for certified sales, according to Autodata.
Cadillac sold 4,205 CPO vehicles for a 48.6-percent year-over-year gain, Mitsubishi moved 144 certified units (up 132.3 percent) and Subaru had 6,450 CPO sales (up 22.9 percent).
Domestic brands combined to sell 83,272 certified vehicles for the month (up 10.4 percent). Through May, they have sold 383,688 units, which is down 3.1 percent from the prior-year period.
Asian brands were up 4.3 percent in May with 113,455 CPO sales, and they have sold 546,477 certified vehicles through five months (up 3.7 percent).
European brands sold 40,718 CPO units for the month (up 7.7 percent).
They have sold 189,207 year-to-date (up 6 percent).