Interesting.
There was a TSB that came out for the 2018 S550 EB’s where the catalytic converters were to be replaced for those vehicles located at a certain altitude. Not sure why it’s specific like that - but I’ll have to locate it again if anyone is interested.
For those who had the stock cats replaced - do you know if the found problem was related to:
1) catalytic converter honeycomb cracked and loose within the shell
2) catalytic converter failure due to melting of the honeycomb
3) catalytic converter failure due to honeycomb pores being plugged
If you (or anyone else) has the TSB number, please post. I ran my VIN through the Ford Owners site and nothing came up.There is a TSB for the GT350 as well. I had a check engine light too. Dealer replaced them with no issues I think I had around 8000 miles on it..