Group sales increased by 12 percent last month to 185,728 vehicles, bringing the cumulative tally so far this year to 425,528 vehicles for an overall gain of 11.2 percent.
BMW said March sales eclipsed the previous monthly record from last June, thanks to strong showings for its 1 Series volume model and a good start for the revamped 3 Series.
These outstanding results are due to our attractive, young model range and our strategy of healthy, balanced growth across the globe, said BMW sales chief Ian Robertson in a statement.
We aim to continue the momentum with additional new models this year, such as the luxurious BMW 6 Series Gran Coupé and a model revision of the flagship BMW 7 Series, he added.
BMW reaffirmed its plans to grow faster than the market and achieve new record sales for its BMW, Mini and Rolls-Royce brands.
China overtook the United States as the group's largest single market in the first quarter, cementing its place as the biggest driver of growth for the premium car industry.
Last week, BMW's Robertson told reporters at the New York auto show that the company enjoyed all time high sales in the first quarter with over 400,000 vehicles delivered to customers.
The BMW brand held off rival Audi in their neck-on-neck race for the top spot in the industry. On Tuesday it said it sold 346,100 Audis in the first quarter, only about 10,000 fewer than the BMW brand.
(Reporting by Christiaan Hetzner. editing by William Hardy)