There are 1 stored owner reports matching the fuel system leading-label group for the 2009 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 1 of 1 matching reports.
Open the full vehicle complaint log (all categories)AT APPROXIMATELY 85K TOTAL MILES, IS250 AUTOMATIC BEGAN DROPPING FROM 5-6K RPM TO 2-3K RPM WHENEVER CHANGING ROAD GRADE TO AN INCLINE OR DECLINE, USUALLY ABOVE 50 MPH, DROPPING TO 35 MPH ON THE HIGHWAY. TO MAINTAIN PROPER SPEED, I WOULD HAVE TO DOWNSHIFT FROM D TO S AND FLOOR THE ACCELERATOR. TRACTION CONTROL, PARKING BRAKE, AND ABS LIGHTS WOULD SOMETIMES COINCIDE WITH THIS PROBLEM. THIS CONTINUED UNTIL I SOLD THE IS250 AT 88K MILES.
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.