i got a 2014 gt cs with stainless power exhaust, had the car for about a year then it started off ruff idle then it would turn off when am coming to a stop. the car is manual and i do the standard procedures when stopping by pushing the clutch in and stopping. recently the check engine light started coming on for the upstream 02 sensor on the passenger side and i replaced it but as soon as i drive the car from the shop the next day i start smelling rotten eggs and the check engine light...

2014 mustang gt/cs 02 sensors keep failing