Kia Motors hit a new record of 5,176 sales in May - a market share of 3.19% - taking sales for the year-to-date in the UK to 27,507 and a market share of 3.17%.
At a global level Kia saw a 15% growth year-on-year with total sales for the month up to 240,000 and total sales so far in 2012 reaching 1,106,041 units.
This continued sales success comes as Kia replaces it all-European Cee'd model - the new car went on UK sale on June 1 and the May record was reached despite the previous version of the five-door hatchback being in run-out.
Kia UK's May sales were up more than 33% compared to last year's month total of 3,873 and up by almost 24% in year-to-date terms from 22,184 at the end of May 2011.
Kia's global sales for the year were up by almost 12% compared to 2011 thanks to sales increases in all major regions including the domestic Korean market - up by 7%, Europe - by 28%, China - by 2% and North America by 9%.
Michael Cole, managing director of Kia Motors (UK), said: "To post a new record May as we were getting ready to replace Cee'd with the all-new model was particularly pleasing and it shows that our dealers are continuing to pull lots of new customers into the brand.
"I am very hopeful that with the launch of the new Cee'd this performance will continue so that we can reach our sales goal for this year of up to 65,000 vehicles.”