There are 3 owner-reported electrical system complaints for the 2003 Lexus LXin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
I TOOK THE CAR TO LEXUS OF GLENDALE FOR ROUTINE SERVICE, WHICH WAS COMPLETED, AND THREE DAYS LATER, AS I WAS DRIVING ON 5 FREEWAY FROM COALINGA TO LOS ANGELES, ALL OF A SUDDEN, I HEARD A GRINDING NOISE FROM THE ENGINE, AND THE CAR STALLED, I WAS ABLE TO PULL OVER TA DS A NEARBY SERVICE STATION (CHEVRON) IN VALENCIA. I NOTED A CHECK ENGINE LIGHT, AND THE VEHICLE BECAME UNDRIVEABLE. THE VEHICLE WAS TOWED TO LEXUS OF GLENDALE, WHO DISCOVERED THAT ONE OF THE SPARK PLUGS HAD COME LOOSE AND LODGED IN THE ENGINE SHALT, THUS BREAKING ONE OF THE PISTON RODS, WITH A RESULTANT ENGINE KNOCK. I WAS INFORMED BY THE DEALER THAT I HAVE TO REPLACE THE ENGINE, AND THAT COST ME OVER $8,000. LEXUS OF GLENDALE WAS NOT ABLE TO TELL ME WHY THE SPARK PLUG CAME LOOSE IN THE FIRST PLACE, SINCE I HAVE OWNED THIS CARE FOR OVER 10 YEARS, WILL GOOD MAINTENANCE RECORD, AND NO ACCIDENTS
THE SPEEDOMETER IS UNREADABLE BETWEEN 10-60 MPH. THERE IS NO ILLUMINATION, THEREFORE YOU HAVE NO IDEA OF THE SPEED OF THE VEHICLE. I NOTIFIED THE DEALER, AND WAS TOLD THIS IS NOT COMMON. THEN I NOTIFIED LEXUS COMPANY, AND THEY SAID "CONTACT THE DEALER". THIS IS A SAFETY CONCERN--MY WIFE IS AFRAID TO DRIVE, FOR FEAR OF SPEEDING OR OTHER SPEED PROBLEMS, AS WITH OTHER LEXUS VEHICLES. WE HAVE HAD THIS VEHICLE LEXUS CERTIFIED DEALER MAINTAINED SINCE WE BOUGHT THE VEHICLE, AND THINK THIS A DANGEROUS SITUATION. THANK YOU, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
IT IS A KNOWN PROBLEM THAT ALOT OF THESE MADE ARE MISSING THE RELAYS FOR THE FOGLIGHTS AND REAR HEAT, AND PARKING BRAKES FREEZE UP.
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 May 4, 2026