I have a 2011 Subaru Forester and while changing the spark plugs I found that some of my ignition coils had failed. I was in desperate need of new ones, and every auto repair shop was charging over $100 a spool. When I found them on Amazon I was skeptical that they would work because of such a low price, but I went ahead and took a chance. It's been a week now and my car runs great, idling and accelerating much smoother! Definitely seems to work well and would recommend!