1991 Lexus LS400 Electrical system Problems
- Complaints
- 1about this part
- Share
- 5%of 21 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the electrical system of the 1991 Lexus LS400, 5% of the 21 complaints for this model year.
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.
“Its well known that the power steering/alternator setup on the 1990-1994 Lexus ls400s are poorly designed. The power steering pumps are known to spring leaks. They are located directly over the alternator charging system and the leaking fluid shorts out the alternator, leading to failure. I have had two of these and both were leaking and after researching, its hard to find a 1990-94 LS400 on the road that does not have a leaking power steering pump. …”
NHTSA complaint #10253002, filed 2008-12Related service bulletins
- 10111398Apr 10, 2015LSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Many…
- 10111205Apr 10, 2015LSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Many…
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2000 | 3 | 25% |
| 1999 | 4 | 18% |
| 1998 | 9 | 20% |
| 1997 | 2 | 15% |
| 1996 | 3 | 16% |
| 1995 | 12 | 31% |
| 1994 | 44 | 65% |
| 1993 | 42 | 65% |
| 1992 | 2 | 25% |
| 1991 | 1 | 5% |
| 1990 | 6 | 25% |
Other parts of the 1991 Lexus LS400
5 complaintsAir bags
3 complaintsOther or unknown
3 complaintsEngine cooling
2 complaintsSteering
2 complaintsTires
2 complaintsVehicle speed control
2 complaintsWheels
2 complaintsFuel system
1 complaintsSeat belts
1 complaintsBody and structure
1 complaints
← All problems reported for the 1991 Lexus LS400
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 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