The Porsche mechanic advised that the air flow meter (AFM) needs replacing. on 1998 Porsche Boxster

I unplugged the AFM and took the car for a drive but there was no change in symptoms, which are: frequent stalling on cold mornings, stumble, hesitates, occasional backfie. The car has done 50,000 miles.

I have been quoted $1700.00 for this new AFM. I would like to get another opinion before I commit to this repair.

Thanks in advance.

Asked by for the 1998 Porsche Boxster