There are 1 stored owner reports matching the engine leading-label group for the 2012 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 1 of 1 matching reports.
Open the full vehicle complaint log (all categories)DURING INSPECTION, TECHNICIAN NOTED COOLANT RESERVOIR VERY LOW. TECHNICIAN TRACED COOLANT LEAK TO VALLEY SEAL. RECOMMEND TO REPLACE NOTICED BEFORE PERFORMING COOLANT REPLACEMENT FOUND THE RESERVOIR WAS NEAR EMPTY INDICATING A LEAK IN THE SYSTEM. INSPECTED RADIATOR ASSEMBLY AND FOUND NO OBVIOUS LEAKS. INSPECTED COOLANT VALLEY FROM UNDER THE CAR AND FOUND LARGE AMOUNTS OF DRY COOLANT AROUND THE TRANSMISSION BELL HOUSING. THIS CONFIRMS THE COOLANT VALLEY IS INDEED LEAKING AND WILL NEED TO BE RESEALED. RESEAL COOLANT VALLEY AND REPLACE SEALS/GASKETS NECESSARY. Driver comment: This is a known issue with Toyota/Lexus V8 engines. Toyota/Lexus needs to take ownership (recall) and fix the worn out seals without charge.
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.