NHTSA lists 2 safety recalls and 19 owner complaints for the 1996 Lexus LS400. Most complaints involve electrical system (3) and engine and engine cooling (2). The EPA rates it 19 mpg combined.
CERTAIN CK MOTORSPORTS COMBINATION HEADLIGHTS, CLEAR CORNER, BUMPER, AND SIDE MARKER LIGHTS SOLD AS REPLACEMENT LAMPS FOR USE ON THE PASSENGER VEHICLES LISTED ABOVE. SOME COMBINATION LAMPS THAT ARE NOT EQUIPPED WITH AMBER SIDE REFLECTORS FAIL TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT.
VEHICLE DESCRIPTION: PASSENGER VEHICLES. DUE TO IMPROPER ASSEMBLY OF THE TERMINAL FOR THE STARTER MOTOR MAGNETIC SWITCH, AN ELECTRICAL SHORT CIRCUIT CAN OCCUR IF ELECTRICALLY-CONDUCTIVE LIQUID, SUCH AS ROAD SPLASH WITH DEICING SALT, ENTERS THIS AREA.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
“TL* THE CONTACT OWNS A 1996 LEXUS LS400. THE CONTACT STATED THAT THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. THE FAILURE MILEAGE WAS 116,000. UPDATED 02/23/16*LJ UPDATED 05/04/18*JB *TR”
“PER LEXUS TECHNICAL SERVICE BULLETIN EG002-97, WHICH DOESN'T APPEAR ON THE NHTSA WEBSITE BUT WHICH CAN BE FOUND ONLINE BY CLICKING ON THE LINK FROM POST #77 AT THIS WEB PAGE: HTTP://US.LEXUSOWNERSCLUB.COM/FORUMS/TOPIC/15699-9596-LS400-LOW-IDLE-ENGINE-DIES-AND-JERKING-THRE/PAGE-6 MY '96 LS400 HAS THE SAME ENGINE-STALL-AT-IDLE-AFTER-CONTINUOUS-LONG-DRIVE PROBLEM AS EVERY OTHER EARLY PRODUCTION CAR MADE WITH VINS BEFORE [XXX]. GO ON THE HIGHWAY, DRIVE 50 MILES, EXIT, THE CAR IDLE SPEED DROPS TO WHERE THE CAR STALLS OUT. PUT IT INTO NEUTRAL, TURN THE KEY, IT STARTS RIGHT BACK UP, NO MORE PROBLEM. OR, DRIVE ON THE HIGHWAY, DRIVE 50 MILES, ENCOUNTER STOP-AND-GO TRAFFIC, THE IDLE SPEED DROPS TO WHERE THE CAR STALLS OUT. PUT IT INTO NEUTRAL, TURN THE KEY, IT STARTS RIGHT BACK UP, NO MORE PROBLEM. I GOT TAPPED BY THE CAR BEHIND ME WHEN AT 1 MPH I WAS COMING TO A RED LIGHT EXITING THE FREEWAY AND THE CAR DIED, THE LIGHT TURNED GREEN AND IT TOOK ME A FRANTIC MOMENT TO TRY PUTTING THE CAR INTO NEUTRAL AND RESTARTING IT WHILE STOPPED IN THE MIDDLE OF TRAFFIC. THIS IS A CLEAR SAFETY ISSUE THAT LEXUS CLEARLY KNOWS ABOUT (SEE EG002-97) BUT WHICH THE NHTSA HAS DONE NOTHING…”
“DRIVING VEHICLE DOWN FREEWAY STARTED SMELLING GASOLINE ODOR. DROVE STRAIGHT TO NEAREST TOYOTA DEALER. TO MAKE A LONG STORY SHORT, THE SEAMS OF THE FUEL TANK HAD SPLIT OPEN. SINCE THE FUEL TANK IS LOCATED IN THE TRUNK THE FUEL DRAINED INTO THE CABIN OF THE VEHICLE AND ALSO WAS SPILLING OUT ON THE DRIVE OF THE DEALERSHIP WHEN I ARRIVED. TEJAS TOYOTA IN HUMBLE, TX. THE DEALER PERSONNEL IMMEDIATELY TOOK THE VEHICLE TO A REMOTE LOCATION ON THEIR LOT DUE TO THE GREAT POSSIBILITY OF AN EXPLOSION. I CONTACTED LEXUS TO NOTIFY OF THE SITUATION, RECEIVED AN INCIDENT NUMBER. CAR WAS REPAIRED, WHEN COMPLETE I NOTIFIED LEXUS, THEY SEEMED NOT TO CARE MUCH, OFFERED TO MAKE ME AN APPOINTMENT AT A LEXUS DEALERSHIP TO VERIFY THE TOYOTA DEALER HAD INSTALLED THE NEW PARTS CORRECTLY FOR A CHARGE. THAT IS AFTER PAYING OVER $2,300.00 FOR A NEW FUEL TANK. THEY CLOSED THE INCIDENT REPORT MUCH TO MY DISMAY. THE MONEY IS NOT THE ISSUE BUT MY CONCERN THAT THIS MIGHT BE AN AGE ISSUE THAT COULD AFFECT OTHERS. I HAD PUT OUT A CIGARETTE JUST BEFORE A FULL TANK OF FUEL EMPTIED INTO THE VEHICLE. OH AND YES I HAD FILLED THE TANK JUST BEFORE THE INCIDENT. I DO POSSESS THIS ORIGINAL DEFECTIVE TANK.…”
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| LS 400 Auto 4-spd, 8 cyl, 4.0 L · Rear-Wheel Drive | 17 | 24 | 19 | $4,200 | 468 |
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
2 safety recalls as of Oct 28, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
Owners filed 19 complaints with NHTSA. The most-cited components are electrical system (3), engine and engine cooling (2), fuel system, gasoline (2). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 1996 Lexus LS400 at 19 mpg combined, depending on engine and drivetrain (1 version rated).