There are 2 stored owner reports matching the engine leading-label group for the 2004 Lexus GX 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)TL* THE CONTACT OWNS A 2004 LEXUS GX470. THE CONTACT HEARD A LOUD NOISE COMING FROM THE VEHICLE. THE DEALER ADVISED THE CONTACT THAT THERE WERE NO RECALLS AND OFFERED NO FURTHER ASSISTANCE. THE MANUFACTURER HAD NOT BEEN NOTIFIED. THE VEHICLE WAS TAKEN TO A PRIVATE MECHANIC WHO INFORMED THE CONTACT THAT THE HEAT SHIELD HAD DETACHED FROM THE VEHICLE BECAUSE THE BOLTS WERE WORN. NO REPAIRS WERE PERFORMED. THE CURRENT AND FAILURE MILEAGES WERE 120,000. A LOCAL REPAIR SHOP INFORMED THE CONSUMER, THE HEAT SHIELD LOCATED ABOVE THE MUFFLER HAD FALLEN OFF AND WAS TRAPPED BETWEEN THE MUFFLER AND THE FLOOR PAN OF THE VEHICLE. THE VIBRATION NOISE HEARD WAS THE HEAT SHIELD RATTLING ON THE MUFFLER ITSELF. UPDATED 06/05/12
WHILE ACCELERATING THE VEHICLE EMITTED A SULFUR/ROTTEN EGG SMELL. *NM THE PROBLEM WAS DUE TO THE CATALYTIC CONVERTER. *SC *JB
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: Aug 30, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.