There are 2 stored owner reports matching the engine leading-label group for the 2011 Lexus IS in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)FUEL IS NOT DELIVERED TO FIRING CHAMBER DUE TO FAILURE OF FUEL PRESSURE SENSOR. THIS WILL CAUSE ENGINE TO SHUT OFF WHEN ON THE ROAD. NO OBD-II CODE IS PRESENT SINCE THE FAILURE OF THE FUEL PRESSURE SENSOR WILL PUT THE CAR IN PROTECTED MODE, NO CODE CAN BE READ. WHEN ENGINE IS SHUT OFF, IT WILL HAVE NO POWER TO STEERING OR BRAKE SYSTEM, PUT DRIVER IN A VERY DANGEROUS SITUATION. I WAS LUCKY ENOUGH TO FIND OUT AFTER ARRIVING HOME. THE PROBLEM APPEARED THE NEXT MORNING.
Valley Plate Leak. The Valley Plate Leaks are notorious on this vehicle. There have been several forums about it.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.