Special Tools Required
Disconnect the secondary HO2S connector (A).

Raise the vehicle on a lift.
Remove the supporters (A), then remove the secondary HO2S (B).

Install the parts in the reverse order of removal.
Regulator Valve Body Disassembly, Inspection, and Reassembly (A/T)
Clean all parts thoroughly in solvent, and dry them with compressed air.
Blow out all passages except the air check valve filter.
Inspect the regulator valve body for scoring and ...
DOT Tire Quality Grading (U.S. Vehicles)
The tires on your vehicle meet all U.S. Federal Safety Requirements. All
tires are
also graded for treadwear, traction, and temperature performance according
to Department of Transportation (DOT) ...