Lexus RX300 1999-2003 Diagnostic in Advance Auto Parts show P0021 Camshaft Position Timing Sensor need to me replaced.
P0304 CYLINDER 4, 5 AND 6
Symptoms: While driving in about 60 mph feels like transmission does not switch correctly it idle a little then shift like a punch. Never happens before.
If idling on tachometer show less then 1000 rpm and not stable car shaking, rpm move up and down.