LEXUS LS400 (1991)
Running costs, common problems, and reliability data based on 55 real MOT tests in 2024.
MOT Pass Rate
91%
Total Tests (2024)
55
Avg Mileage
145,765 mi
Est. Annual Cost
£2,097
Is the 1991 LEXUS LS400 reliable?
Excellent reliability. Very few MOT failures. That's 9 points above the national average of 82%. It also outperforms the LEXUS brand average of 87%.
At 33 years old, 91% of LEXUS LS400s from 1991 passed their MOT first time in 2024. That's based on 55 tests across the UK. The average mileage at this age is 145,765 miles.
How does the 1991 LEXUS LS400 compare?
Mileage Analysis
The average 1991 LEXUS LS400 has 145,765 miles on the clock, which is below the expected 244,200 miles for a 33-year-old car. This suggests lighter use than average, which generally means less wear on major components.
How much does a 1991 LEXUS LS400 cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
LEXUS LS400 by Year
Checking a specific LEXUS LS400?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 1991 LEXUS LS400
The 1991 LEXUS LS400 is a premium performance with a 3969cc petrol engine. 55 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It ranks in the top 15% of all 1991 cars for reliability.
With an average of 145,765 miles at 33 years old, LEXUS LS400 owners tend to use this car less than the typical driver.
1991 LEXUS LS400 Fuel Costs
The 3969cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 1991 LEXUS LS400?
Total estimated annual running cost is £2,097 (£175/month), broken down as £1592 fuel, £250 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 91% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
LEXUS LS400 Reliability Trend
Older LEXUS LS400s tend to have better MOT pass rates than newer ones, with an average decline of 3 percentage points across model years.
Buying a Used 1991 LEXUS LS400
At 33 years old, the LEXUS LS400 is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. Note: with only 55 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 1991 LEXUS LS400
The LEXUS LS400 is actually the most reliable option among similar petrol premium performances from this era. Here are comparable petrol cars with similar engines:
- PORSCHE 911 (1990) 91% pass rate (same) from 1,888 tests
- LAND ROVER RANGE ROVER (1993) 81% pass rate (-10%) from 1,021 tests
- JAGUAR XJS (1993) 84% pass rate (-7%) from 925 tests
- TVR GRIFFITH (1992) 88% pass rate (-3%) from 517 tests