My car is having an idle issue, it's idling randomly at lights and stalling .

No codes or check engine light, car runs fun just the random idle issue, sometimes it corrects it's , or if I rev engine during the scenario it will correct itself if I don't rev engine it will stall. Happens 3 or so times a day. Hope this helps, thank you for reply .

Hey there, thank you.. When BMW had car the failed oxygen sensor code was 200. Mixture too lean bank2. So they replaced oxygen sensors before cat. Could the sensors after the cat be the issue ?

Your getting code for misfire in 2? If u replaced the plugs and coils than check the intake boot. https://www.google.com/search?q=opiate+drug+test+under+300+is+ositive&rlz=1CDGOYI_enUS688US688&oq=opiate+drug+test+under+300+is+ositive&aqs=chrome..69i57.15474j0j4&hl=en-US&sourceid=chrome-mobile&ie=UTF-8 If there is a rip in the boot it throws o2 sensor codes. I bet u have a rip in the boot like it the picture. If that doesn't work buy a cat cleaner and clean out the cat itself. If the cleaner works for a few months but code comes back u need new cat. Dirty/bad cats causes this code. Previous owner perhaps didn't change oil as much as he should of. Could possibly be other sensor. Im shocked they didn't replace both at same time. It's a mistake not to do that most times. Could definitely be that. Also change mechanics. Don't use a stealer-ship rip off. Charge u double plus they should have replaced both sensors unless ones brand new.

Thanks for the info, the intake boot and plugs have been replaced . Only thing that has not had attention would be coils and sensor. I'll take your advise on cat cleaner, any suggestion on best one to use?

No clue. Never used before. I just replaced my cat cuz I knew it was bad