In an effort to boost sales, Toyota Motor Co. has begun pitching two years of free maintenance with the purchase of its Toyota and Scion cars, making them the first mass-market auto brands to offer such a service.

The offer is the latest in a campaign by the world’s largest automaker to reassure buyers that its cars are desirable amid massive recalls that have slowed sales.

The perk includes normal factory-scheduled maintenance, such as oil changes, as well as 24-hour roadside assistance for two years or 25,000 miles, whichever comes first.