NHTSA Owner Complaint Log
This page lists owner-reported complaints filed with NHTSA for the 2021 Lexus IS. Complaints are unverified consumer reports submitted to NHTSA and do not by themselves prove a defect or defect rate.
I was in a vehicle accident on March 30. A accident that could have been avoided if the horn on the IS350 2021 was louder. The vehicle that collided into my vehicle was a Dodge Ram that was hauling a travel trailer which was what hit me. I tried honking various times to let the driver know that I was present and that they were merging onto my lane and I believe due to the weak sound of the horns installed in these vehicles the driver of the other car did not hear my warnings and collided into me.
The sunroof exploded while driving on a freeway. No rocks were involved, very loud explosion. Sun shade was closed, which prevented glass from getting inside car.
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.