There are 2 owner-reported engine complaints for the 2004 Lexus GXin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
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.
Data synced from NHTSA on Apr 25, 2026