1992 Lexus SC400 problems & reliability
30 owner complaints filed with NHTSA for the 1992 Lexus SC400. 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.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Electrical System → | 12 | 40% |
| Exterior Lighting | 5 | 17% |
| Service Brakes, Hydraulic | 5 | 17% |
| Vehicle Speed Control | 4 | 13% |
| Unknown OR Other | 3 | 10% |
| Equipment | 2 | 7% |
| Interior Lighting | 2 | 7% |
| Power Train | 2 | 7% |
| Air Bags | 1 | 3% |
| Engine and Engine Cooling | 1 | 3% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
All 12 reported components →Complaints by incident year
What owners report
“Dash instrument speed, tach, gas, and temperature needles no longer illuminate. Therefore, you can not view them at night and, often, during the day. No adequate repair is available. *tr”
Electrical System · filed Apr 15, 2012
“Unintended acceleration, my 1992 lexus sc400 accelerated to nearly 90 mph on a 50 mph rd. After going through a yellow light. When I was near the speed limit of 50 mph I let up off the accelerator but the car was climbing in speed as if I was still on the accelerator, I applied the brakes twice and each time I did it…”
Vehicle Speed Control · filed Mar 7, 2010
“1. The last time my car had sudden acceleration was at a service station when I shift the gear from "d" to "r". I hold the brake real hard and shifted the gear in "n" and the engine rpm back to normal. The whole event caused about two second and almost hit a car behind my car, smoke was generated from tire spinning…”
Power Train · filed Feb 3, 2010
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
27 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 1992 Lexus SC400. 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
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
Auto matic Transmission Replacement kPrecautions
LSB008214 · Service Bulletin/Repair Instructions · issued Oct 16, 2014
TSB: OBSOLETE NOTICE-October 16, 2014: This bulletin is now obsolete. Please see L-SB-0082-14.
L-SB-0041-11 Rev · Service Bulletin/Repair Instructions · issued Oct 16, 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 1992 Lexus SC400 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 1992 Lexus SC400?
- · 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.