I recently 6 weeks ago bought a used certified 2016 Toyota Corolla with 43,000 miles. I have been going back and forth with Toyota since the day after I bought it about the many mechanical issues that pose a major safety risk. The car shudders/vibrates when accelerating, knocks when backing up. And when making turns the car shifts hard side to side with a shudder and wobble in floor board of car. It feels as if you dont have control of the vehicle when driving. It has lots of loose play in the front end and steering really the whole car. It also has a problem going up hill and jumping on fwy a major problem accelerating. They keep telling me car is working per design but this is a lie. I have taken it to 2 other mechanics who told me this car has major issues safety ones to take it back. Toyota fixed the control arms stating that might be what it is but the same problems remain. I am afraid to drive this vehicle and they refuse to figure out the problems and fix them. 2 days after buying it I told them take the car back it has too many mechanical issues they refused. I dont know what to do I cannot continue driving this car like this and in the rain it could barely handle also. The car has a feeling of loss of control like the whole frame of car is loose. I need help and dont know what else to do Ive taken the car back to them about 15 times. They continue to lie and say nothing is wrong even though when I test drove it with the head mechanic. He admitted the car has major issues but told me he did not want to get involved and I would have to take it up with management. I traded in my 2011 suv that was in good working order to buy this smaller car so my daughter could also learn to drive. They should have never sold this vehicle with this many mechanical safety issues please help.