Car started to hesitate and it didn't seem to be getting gas, especially up hills. I wasn't sure it would make it and was going about 10 mph. Took it in and they couldn't find anything. Kept happening till it died on a hill. Had it towed and they couldn't find anything. Stopped at my local repair center and asked them and they said it sounded like possibly bad coils and/or spark plugs. Took it to the dealer again and asked them to check that. They did find 5 bad ones and replaced. Started happening again last year and was going to take it in for service but my son-in-law said he would look at it. Found they replaced the 5 coils and sparks with cheaper versions and not the ones called for in the owner's manual. He got the authorized parts and replaced them for me.