Hey all, new to the forum. Looking for information on a 2005 Limited 210-hp, 3.7-liter V-6. This car has 36,000 miles on it, one owner dealer maintained. Got a check engine light indicating no ignition on cylinder #3. Dealer changed plugs and coil, thinking it was an ignition problem. 3 months later same check engine light code. Dealer says low compression in cylinder #3 and thinks it's a cracked head. This is my mother in-laws car, like new, never been overheated. Very low miles, she's elderly. What does everyone think? Seems unusual to me. Is this a common failure? Any info would be greatly appreciated. Thanks in advance.