1999 Lexus LS400 problems & reliability
22 owner complaints filed with NHTSA for the 1999 Lexus LS400. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
3 complaints report injuries (102 injured).
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Vehicle Speed Control → | 12 | 55% |
| Electrical System | 4 | 18% |
| Structure | 2 | 9% |
| Tires | 2 | 9% |
| Engine and Engine Cooling | 1 | 5% |
| Interior Lighting | 1 | 5% |
| Power Train | 1 | 5% |
| Seat Belts | 1 | 5% |
| Service Brakes, Hydraulic | 1 | 5% |
| Steering | 1 | 5% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Complaints by incident year
What owners report
“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…”
Vehicle Speed Control · filed Dec 5, 2012
“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.”
Structure · filed Sep 1, 2010
“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…”
Electrical System · filed Jun 25, 2010
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- UNINTENDED ENGINE SPEED INCREASE/SA
Defect Petition DP03003 · opened Jul 17, 2003 · closed Sep 23, 2003
Technical service bulletins
50 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 1999 Lexus LS400. The 10 most recent:
Lexus Safety Recall and Service Campaign - Technician Certification Requirements 4.13.2022
Safety Recall 22 · Service Bulletin/Repair Instructions · issued Apr 13, 2022
POL: This consolidated Tire Warranty Guide contains the complete warranty terms for all brands of ground and spare tires currently in use by Lexus. This information must be kept near the point of vehicle sale and be…
Lexus PRO19-02 - · Service Bulletin/Repair Instructions · issued Jan 12, 2022
Safety Recall and Service Campaign - Technician Certification Requirements
Lexus Safety Re · Service Bulletin/Repair Instructions · issued May 1, 2020
TSB: OBSOLETE NOTICE April 06, 2020: This bulletin is now obsolete. Please see L-SB-0008-20. Replacement Certification Labels and VIN Plates
L-SB-0179-17 Obs · Service Bulletin/Repair Instructions · issued Apr 6, 2020
TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin Nos. L-SB-0048-08, PG007-07, PG016-01, PG015-01, PG004-97, PG003-97, PG003-93, PG002-90, L-SB-0048-08, PG007-07, PG016-01…
L-SB-0008-20 · Service Bulletin/Repair Instructions · issued Apr 6, 2020
TSB: Replacement Certification Labels. OBSOLETE NOTICE November 28, 2017: This bulletin is now obsolete. Please see L-SB-0179-17.
L-SB-0048-08 Obs · Service Bulletin/Repair Instructions · issued Dec 5, 2017
TSB: The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased.
L-SB-0025-14 · Service Bulletin/Repair Instructions · issued Jul 7, 2015
LSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Many lubricants, cleaners, and automotive chemicals…
L-SB-0066-11 Rev · Service Bulletin/Repair Instructions · issued Apr 10, 2015
LSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Many lubricants, cleaners, and automotive chemicals…
L-SB-0066-11 Rev · Service Bulletin/Repair Instructions · issued Apr 10, 2015
TSB: The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased.
L-SB-0025-14 Rev · Service Bulletin/Repair Instructions · issued Nov 14, 2014
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
No NHTSA recall campaigns name the 1999 Lexus LS400 in our current data. Recalls may apply only to certain VIN ranges — always confirm with a VIN check.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 1999 Lexus LS400?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.