Three problems related to loud engine noise have been reported for the 2012 Ford Focus. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Ford Focus based on all problems reported for the 2012 Focus.
I have had the car back to the dealer twice for it studdering and not shifting right. It has still shuddered once in a while while going forward coasting and turning but not as bad as when I took it in. I love my Focus but am so upset that it now has a major transmission problem that may not be covered under my extended warranty. I don't have that kind of money and I take good care of my car, getting oil changes ect when due. Ganley Ford in barberton now has it and is taking it apart to see what the issue is. Should not happen on a car this new. It started making a loud noise when pushing on the gas and driving at about 40-50mph. The noise was loud like a race car, vibration noise. I took it in to Ford the following day and was told it was not safe to drive. I mostly drive on street, not on the highway. It was in drive going forward that the noise issue occured, getting louder the warmer the car was.
On 10/15/15 my car stalled and completely pulled back , died down to almost a halt then kicked into gear again , like a pull and let go motion. Out of nowhere, this gave me a scare since I was driving and could have been rear ended because of this complete stall in the middle of the road on n. E. 163rd street north miami beach towards biscayne blvd. Engine light went on and a screen message showed up asking me to service transmission now! I have had to park car until I figure what to do? this car has turned out to be a problem for me, first with the back driver side door latch where door just flew open while driving, (that's a different claim I have placed with NHTSA). I can't afford to keep fixing these problems appearing to this Ford Focus. Radio also went dead with a super loud disrupting pop sound and loud static electrical noises which could not be controlled by lowering volume or turning off radio , this loud pop sound startled me also while driving on turnpike from davie towards north miami beach. Would like to get Ford motor to recognize that my Ford Focus 2012 is a lemon, if not the right term then it's a product of shoddy parts used to construct this car.
Purchased new and within 40,000 miles the clutch has failed two times and the transmission module has failed once and has had to be reprogrammed twice. The suspension makes loud noises on the front end whenever you hit any bump. I feel unsafe driving this car because it can lose the ability to accelerate at any time without warning.