With one import notching its seventh straight best-ever month, European and Asian-brand certified pre-owned programs both increased total CPO sales by double-digit percentages in September.

According to Autodata Corp., there were 88,033 CPO vehicles sold by Asian brands last month, a 12.8-percent increase from September 2013.  Their year-to-date sales stand at 823,789, a 4.4-percent gain.

Meanwhile, European brands sold 32,782 certified vehicles in September, a 29.6-percent hike from a year ago. Through three quarters, they have sold 308,199 CPO vehicles (up 16.6 percent).

One of the import brands, Kia, had its best certified month ever, selling 4,854 units. This was a 66.4-percent year-over-year increase and pushed its yearly sum to 35, 973 CPO sales (up 43.3 percent). Kia has now posted a best-ever sales tally in each of the last seven months, the company said.

Another record-breaker was Hyundai. The program had its best September on record, with 7,657 CPO sales (up 29.2 percent). Through nine months, it has moved 71,253 certified vehicles for a 24.2-percent gain.