Among those it singled out were Volkswagen’s luxury division Audi and BMW.
BMW’s office in China declined to comment on any possible NDRC investigation. Audi’s office in the country did not respond to a request for comment on such a probe.
Foreign carmakers and their local partners control around three-quarters of the overall Chinese market. Imports are generally luxury vehicles, accounting for 5.7% of total car sales last year.
China has become a key market for luxury carmakers, with 2.7 million expected to be sold each year by 2020, overtaking the United States as the world’s leader in the segment.
Luo said his association had sought data from dealers as well as carmakers, but he declined to comment further on how CADA was getting its information.