The engine constantly rattled/shudders violently upon initial start for about 20-30 seconds, and check engine light is on. Driving, acceleration, and fuel economy has decreased/worsened. A mechanic in santa monica stated that the obd readings show random engine's cylinders misfires; and a three-day physical observation after the intake manifold removal shows: Unexplained coolant oil contamination issues, oil mixed with coolant at expansion tank, raw fuel on cylinders, fuel blow by, and repeated spark plugs burning after each replacement. And due to the high cost of forecasted repairs and parts replacement, the technicians recommended replacing the whole engine unit. We're extremely disappointed, Lexus!

- Los Angeles, CA, USA

Starting cold. Foot on brake. Push start button. Dash stuff lights up but car does not start. Take foot off brake and depress gas pedal. Car starts. It will stall if left to run with foot off gas pedal.easy to restart by depressing gas pedal and no foot on brake. Does this consistently. Took car to dealer and they changed the oil because they could not duplicate the problem.

- Taylors, SC, USA