General Motors was the first OEM to install Mircroheat's HotShot heated windshield wiper fluid system into its cars. That was in 2006. But the hot, wet good times didn't last long, with underhood fires causing GM to recall almost a million vehicles in 2008 due to problems it claimed were caused by the HotShot. For its part, HotShot didn't accept the blame, claiming GM's electrical system was at fault.
Heated windshield washer system: Good. Heated windshield washer system that gets so hot it could potentially cause a fire: Recall. General Motors has announced that it is recalling some 1.5 million vehicles built between 2006 and 2009 for just such a problem. A similar measure was taken in 2008, but apparently the fix performed for that recall hasn't eradicated the issue entirely.