TOKYO (AP) — Toyota Chairman Akio Toyoda apologized Monday for massive cheating on certification tests for seven vehicle models as the automaker suspended production of three of them.

The wide-ranging faulty testing at Japan’s top automaker involved the use of inadequate or outdated data in collision tests, and incorrect testing of airbag inflation and rear-seat damage in crashes. Engine power tests also were found to have been falsified.

Toyota Motor Corp., based in Toyota city, central Japan, suspended production in Japan of the Corolla Fielder, Corolla Axio and Yaris Cross. The faulty tests were also found on discontinued models.

The company said the wrongdoing does not affect the safety of the vehicles already on roads, which include the Corolla subcompact and Lexus luxury vehicles.

“We sincerely apologize,” Toyoda said, bowing deeply at a news conference in Tokyo.