WHO MAINTAINED IT is maybe the more important question. How old is the aircraft, how much use has it seen and what is the competency of the maintenance crew? From what I see the last 737 was made in December 2019.
“From what I see the last 737 was made in December 2019.”
Depends which model. Right now, the Max series are in current and scheduled production. The NG series have been phased out of production except for military versions.