NHTSA lists 1 safety recall and 22 owner complaints for the 1999 Lexus LS400. Most complaints involve vehicle speed control (12) and electrical system (4). The EPA rates it 19 mpg combined.
CERTAIN PRO-A MOTORS CORNER LAMPS, TURN SIGNALS, AND HEADLIGHTS SOLD AS REPLACEMENT LAMPS FOR USE ON CERTAIN 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.
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 1999 LEXUS LS400. THE CONTACT STATED THAT WHILE DRIVING 15 MPH, HE APPLIED THE BRAKE DUE TO TRAFFIC. HOWEVER, THE VEHICLE ACCELERATED INDEPENDENTLY AND CRASHED INTO THE REAR OF ANOTHER VEHICLE. THE CRASH CAUSED DAMAGE TO BOTH VEHICLES AS WELL AS AN INJURED KNEE OF THE DRIVER OF THE VEHICLE THAT WAS STRUCK. THE FAILURE HAD RECURRED NUMEROUS TIMES. THE DEALER WAS NOTIFIED AND HE WAS INFORMED THE THROTTLE BODY WOULD PROBABLY NEED TO BE REPLACED. ALSO, HE WAS INFORMED THAT DUE TO THE TYPE OF FAILURE HE WOULD HAVE TO CONTACT THE MANUFACTURER. THE MANUFACTURER WAS NOTIFIED AND INFORMED THE CONTACT THAT THE LEGAL DEPARTMENT WOULD HAVE TO BE NOTIFIED BUT OFFERED NO OTHER ASSISTANCE. THE FAILURE MILEAGE WAS 130,000 AND CURRENT MILEAGE WAS 145,000. UPDATED 02/19/13”
“OUR 1999LS400 LEXUS IS EXPERIENCING MALFUNCTIONS WITH THE ELECTRONICS IN THE DASH. THE ODOMETER AND THE SPEEDOMETER ARE WORKING INTERMITTENTLY. LEXUS WANTS 1200.00 TO PULL OUT DASH AND SEND AWAY TO REPAIR. I AM CONCERNED THIS IS A HUGE SAFETY ISSUE. I DON'T KNOW WHOSE REPLACING WHAT AND ARE THEY CERTIFIED LEXUS MECHANICS??? ARE THESE EARLY MODEL LS400'S HAVING ELECTRONICS PROBLEMS OR IS THIS JUST A SINGLE CASE? PLEASE LET ME KNOW. *TR”
“TL*THE CONTACT OWNS A 1999 LEXUS LS400. THE CONTACT STATED THAT WHILE WORKING UNDER THE HOOD IT STARTED CLOSING CREATING A SAFETY HAZARD. THE VEHICLE WAS REPAIRED BY A LOCAL MECHANIC. TOYOTA WAS NOT CONTACTED. THE VIN WAS NOT AVAILABLE. THE FAILURE MILEAGE WAS APPROXIMATELY 100,000. THE CURRENT MILEAGE WAS 120,000.”
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 5-spd, 8 cyl, 4.0 L · Rear-Wheel Drive | 16 | 23 | 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 |
1 safety recall 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 22 complaints with NHTSA. The most-cited components are vehicle speed control (12), electrical system (4), structure (2). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 1999 Lexus LS400 at 19 mpg combined, depending on engine and drivetrain (1 version rated).