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What 11 owners told NHTSA about the 2012 Lexus GX 460
These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.
1 of 11 complaints match · Engine · clear filters
Oct 27, 2023Engine
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.
NHTSA ODI 11552300
Working with the data? Download all 11 complaints as CSV · fetched from NHTSA July 14, 2026
How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your
pre-purchase inspection list. Back to the
full 2012 Lexus GX 460 verdict →