Disconnect the negative battery cable
Relieve the fuel system pressure
Remove the engine cover and any intake parts blocking access
Disconnect the electrical connectors from the injectors
Disconnect the fuel rail supply line
Remove any bolts or brackets securing the fuel rail
Carefully lift the fuel rail with the injectors attached
Remove the old injectors from the fuel rail
Replace the injector O-rings and seals
Lubricate the new O-rings with clean engine oil or fuel
Install the new injectors into the fuel rail
Reinstall the fuel rail and seat the injectors properly
Reinstall and tighten the mounting bolts to specification
Reconnect the fuel line and electrical connectors
Reinstall any removed intake parts and engine covers
Reconnect the negative battery cable
Turn the ignition on and check for fuel leaks
Start the engine and verify smooth operation
Scan for diagnostic trouble codes if needed