I purchase my 2018 Hybrid C-Max in 2019. I took it in because it had a strange noise I didn't recognize. I made an appointment to take it in and they were backed up in service so I made an appointment and they estimate having it for a week and 1 and 1/2 weeks to repair. My dealer did offer me a car to use while the repairs are being made. Great that it was under warranty. i thought that the transmission problems had been resolved after earlier model failures.
I'm concerned about the hybrid battery now as the replacement for these is also around $4,000. I didn't consider this when I purchased it. I do like the car very much though but concerned about the future maintenance costs.