1999 Lexus LS400 Vehicle speed control Problems
- Complaints
- 12about this part
- Share
- 55%of 22 total for the year
- Median mileage
- 57,934miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 12 complaints about the vehicle speed control of the 1999 Lexus LS400, 55% of the 22 complaints for this model year. Where a mileage was given, the median is 57,934 miles. 6 of these say a crash was involved, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I'm writing this in the hopes that it may be of some help in toyotas brake problem. My 1999 Lexus LS400 would loose throttle control, the engine speed would drop to idle regardless of what was done to the throttle itself. After 3 trips to the dealer, they found that the throttle position sensor would not work if it had become wet. They replaced the tps and that cured the problem.”
NHTSA complaint #10310746, filed 2010-02, 10,000 miles“Lexus ls 400 1999 model. Dangerous hesitation upon acceleration. Further after driving this car for two years, I have neck pains from the daily whiplash. Toyota is igrnoring this system wide. It is an outrage. Its damaging peoples necks all over the country. They will not fix it - they claim its normal. Other dealers are telling customers about it - - my wife refuses to drive my car - it's dangerous!”
NHTSA complaint #10129899, filed 2005-07, 46,000 miles“I am reporting this because it might provide a clue to the toyota racing engine problem. On each of two days before I took my 1999 Lexus 400 to the dealer for repairs, the engine would race at an estimated 4,000+ rpms and emitted a grinding sound as the car was started. After turning off the engine with the key, the car would restart without a problem. Strangely, the dealer did not record this particular complaint, but stated that diagnosis revealed that starter was failing. I was charged $990 for replacement and repairs. …”
NHTSA complaint #10319258, filed 2010-03, 91,080 miles“While driving 2 MPH, the vehicle accelerated uncontrollably. The consumer was unable to maintain control of the vehicle and crashed into a building. Upon impact, both frontal air bags failed to deploy. The vehicle was towed to the dealer for inspection. The consumer was pulling into a parking space, slowly, with his foot on the brake when the vehicle suddenly accelerated, went over the curb and into the side of the building.”
NHTSA complaint #10083578, filed 2004-08, 65,869 miles“It was raining and I was entering highway, I had my left turn signal on and started to accelerate. The car started to fish tail and when into a 360 degree spin, maybe twice, at least 1 1/2 times. When I came out of spin I crashed into the cement median. At no time did the vsc (vehicle skid control) activate. It is something that you can't miss. A lound warning sound comes on and the dashboard lights up with a skid warning. It had happened once before in the snow.”
NHTSA complaint #753195, filed 2001-10Vehicle speed control: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2000 | 6 | 50% |
| 1999 | 12 | 55% |
| 1998 | 14 | 31% |
| 1997 | 3 | 23% |
| 1996 | 1 | 5% |
| 1995 | 1 | 3% |
| 1993 | 5 | 8% |
| 1992 | 1 | 13% |
| 1991 | 2 | 10% |
| 1990 | 2 | 8% |
Other parts of the 1999 Lexus LS400
4 complaintsBody and structure
2 complaintsTires
2 complaintsBrakes
1 complaintsEngine cooling
1 complaintsInterior lighting
1 complaintsSeat belts
1 complaintsSteering
1 complaintsTransmission and drivetrain
1 complaints
← All problems reported for the 1999 Lexus LS400
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology