Notching an all-time high in March, the certified pre-owned market has just completed its best quarter ever, according to Autodata Corp.

Releasing monthly and quarterly CPO results Wednesday afternoon, Autodata said there were 206,409 certified sales in March, which was an 8.6-percent year-over-year increase.

This capped a record quarter, as 551,707 certified cars were sold (up 10.9 percent year-over-year), according to Autodata.

Domestic brands sold 71,103 certified vehicles in March (up 12.4 percent) and 196,074 in Q1 (up 18.1 percent). Asian brands moved 99,363 CPO vehicles for the month (up 4.8 percent) and 261,718 units for the quarter (up 6.6 percent).

European brands sold 35,943 CPO cars in March (up 12 percent) and 93,915 for Q1 (up 9.1 percent).