Depressurize fuel system. Disconnect battery's negative terminal. V6 MODELS, Remove engine cover, air filter housing,
Fuel Rail, injectors, and fuel pressure regulator. Discard old regulator O-ring, replace with new, oil-coated one. Reinstall in reverse order, ensuring correct torque on regulator bolts. FOUR-CYLINDER MODELS, Remove intake air connector, disconnect vacuum hose, fuel return line, electrical connectors from
Throttle Body and EGR purge valve. Remove regulator securing bolts, discard old O-ring, replace with new, oil-coated one. Reinstall in reverse order, ensuring correct torque on regulator bolts.