Honda Motor expects to recall more than 1m more vehicles to check for potentially defective air bags, a media report said.

This would further expanding a massive, multi-company air bag recall, Reuters said.

A source cited by the news agency said the Honda recall should be announced by the end of June. It involves faulty air bag inflators supplied by Takata and would follow a similar move Toyota announced earlier.

The source told Reuters Honda, while waiting for further information from Takata on its inflator problems, is also investigating on its own how many vehicles it may need to call back and where they are. The number of vehicles it could recall is likely to exceed the 1.135m vehicles Honda called back globally last year, the source said.

Asked whether Honda would expand airbag-related recalls from last year, spokeswoman Akemi Ando told the news agency: "We are conducting investigations quickly and if we decide that there are vehicles that should be called back, we will swiftly file for a recall."

Toyota last week recalled 1.62m previously recalled vehicles outside of Japan as well as 650,000 more in Japan not previously recalled. The additional vehicles brought to more than 7m the total number of cars equipped with Takata air bags to be called back worldwide over the last five years, Reuters noted.

Reuters added that the National Highway Traffic Safety Administration, last week said it had opened a probe into an estimated 1,092,000 vehicles made by Toyota, Honda, Nissan, Mazda and Chrysler Group after receiving six reports of air bags not deploying properly in the humid climates of Florida and Puerto Rico.