The dealer probably was referring to the MAP (Manifold Absolute Pressure) sensor, not the MAF (Mass Airflow Sensor).

BTW, I replaced that rear, upstream O2 sensor this summer on the wife's 98 'tour. Took less than an hour and the sensor cost was about 70 bucks from AutoZone (Bosch sensor). Removal of the coil pack was definitely needed.

Steve

98 Contour SE Sport 2.5 Duratec ATX The wifey's car 89 Taurus SHO - 246K miles 94 SHO ATX - 190K 1997 F-150 5.4L ATX - The Workhorse 150K. ANY THREAD WITH "OMG" or "WTF" ETC IN THE TITLE WILL BE IGNORED!