1991 Lexus LS400 problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
13 owner complaints analyzed
0 distinct recall campaigns
119,813 mi median reported failure mileage
Scope: 1991 model year. Data snapshot: . 2 complaints include usable failure mileage.
Most common problems
Unknown Or Other is the most frequently named component, appearing in 3 of 13 complaints (23.1%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Braking behavior | 4 | 30.8% |
| Steering behavior | 1 | 7.7% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Unknown Or Other | 3 |
| Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip | 2 |
| Air Bags:Frontal | 1 |
| Electrical System | 1 |
| Fuel/Propulsion System | 1 |
| Parking Brake:Conventional | 1 |
| Seat Belts | 1 |
| Service Brakes, Hydraulic | 1 |
Unknown Or Other: 3; Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip: 2; Air Bags:Frontal: 1; Electrical System: 1; Fuel/Propulsion System: 1; Parking Brake:Conventional: 1; Seat Belts: 1; Service Brakes, Hydraulic: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 0 |
| 25,000 to 49,999 | 0 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 2 |
| 150,000 and above | 0 |
Under 25,000: 0; 25,000 to 49,999: 0; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 2; 150,000 and above: 0
100,000 to 149,999 miles has the most reports with usable mileage (2). 11 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 1995 | 5 |
| 1996 | 1 |
| 2000 | 1 |
| 2001 | 1 |
| 2008 | 2 |
| 2011 | 1 |
| 2016 | 1 |
| 2017 | 1 |
1995: 5; 1996: 1; 2000: 1; 2001: 1; 2008: 2; 2011: 1; 2016: 1; 2017: 1
Pattern summary
Unknown Or Other leads the component reports. Braking behavior appears in 4 complaint narratives. Steering behavior appears in 1 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 10412439 · 2011-07-15 (July 15, 2011)
TL* THE CONTACT OWNS A 1991 LEXUS LS 400. THE CONTACT WAS EXITING A PARKING SPACE WHEN THE BRAKE PEDAL WAS DEPRESSED INTO THE FLOORBOARD ABNORMALLY. IN ADDITION, THE CONTACT NOTICED THAT BRAKE FLUID WAS LEAKING FROM THE VEHICLE. THE VEHICLE WAS AT LOCAL REPAIR SHOP WHERE IT WAS DIAGNOSED THAT THE BRAKE LINES WERE FRACTURED AND HAD CAUSED THE BRAKE FLUID LEAK. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE BUT DID NOT OFFER ANY ASSISTANCE OTHER THAN FILING A COMPLAINT FOR THE CONTACT. THE VEHICLE WAS REPAIRED. THE FAILURE MILEAGE WAS 134,625 AND…
Owner-reported narrative. 134,625 miles reported. Look up ODI 10412439 at NHTSA ↗
Owner report 481512 · 1995-02-18 (February 18, 1995)
BRAKES FAILED TWICE. *AK
Owner-reported narrative. Look up ODI 481512 at NHTSA ↗
Owner report 10253002 · 2008-12-29 (December 29, 2008)
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. THE PUMP SEALS SHOULD HAVE BEEN BETTER MANUFACTURED, PLACED IN A DIFFERENT CONFIGURATION, OR…
Owner-reported narrative. Look up ODI 10253002 at NHTSA ↗