I bought a brand new Chevolet Impala 2017 from JK Chevrolet with 3 miles on the odometer. I recently had problems with the catalytic converter. When I got my car back, I could still smell the fumes inside my car from the exhaust. I could barely breath. The next day I brought my car back. I was taken aback by this experience. A customer should never smell fumes inside the car from the exhaust manifold and converter. I was not pleased at all.