WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
SPECIAL TOOL CHART
Exhaust Back Pressure Gauge 309-D002 (D95L-6000-A) or equivalent
Socket, Exhaust Gas Oxygen Sensor 303-476 (T94P-9472-A)