Subaru is recalling 100,127 cars in the United States for secondary air-injection pumps that can catch fire, according to filings with the National Highway Traffic Safety Administration.

Just a couple of weeks ago, Subaru recalled an array of Legacy ... The problem comes down to the secondary air injection pump, whose relay could fail. That could result in the pump operating ...

The engine valve springs in these ... continuously operate and overheat. Subaru will notify owners, and dealers will replace the secondary air injection pump relay, free of charge.