Lexus RX400H Reliability, MOT Pass Rate & Common Faults
Free Lexus RX400H car check
Is the Lexus RX400H reliable? We analysed 166,693 real MOT tests across 9,581 vehicles to find out.
Got a specific Lexus RX400H? Enter the reg for a free check:
The Lexus RX400H is above average for reliability based on real UK MOT data. Common problems include tyre tread depth below requirements of 1.6mm, windscreen wiper does not clear the windscreen effectively and tyre has a cut in excess of the requirements deep enough to reach the ply or cords. Here's everything you need to know before buying a used Lexus RX400H.
Lexus RX400H Number Plates
Number plates registered to a Lexus RX400H. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Lexus RX400H MOT Pass Rate by Year
How likely is a Lexus RX400H to pass its MOT? Here's the pass rate for each registration year, newest first.
Lexus RX400H Problems — What Goes Wrong?
The most common reasons a Lexus RX400H fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Lexus RX400H Common Faults & Problems
These are the most common serious faults found on Lexus RX400H models during MOT testing — flagged as dangerous or major failures that need immediate attention.
Lexus RX400H Mileage — What's Normal?
How many miles does a typical Lexus RX400H owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Lexus RX400H MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Lexus RX400H year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2010 | 152 | 85.5% | 42,594 | 58,178 | 86,168 |
| 2009 | 18,661 | 84.4% | 50,454 | 79,721 | 112,568 |
| 2008 | 39,619 | 82.6% | 55,514 | 86,366 | 119,792 |
| 2007 | 48,462 | 80.9% | 58,127 | 91,342 | 127,150 |
| 2006 | 37,982 | 80.9% | 60,771 | 94,175 | 130,226 |
| 2005 | 21,329 | 79.8% | 63,386 | 97,551 | 134,646 |
How Long Does a Lexus RX400H Last?
Based on 9,581 Lexus RX400H vehicles on UK roads.
Lexus RX400H Mileage Distribution
Total mileage recorded across all Lexus RX400H MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
Best Year to Buy a Used Lexus RX400H
Based on MOT pass rates across all registration years with sufficient test data.
85.5% MOT pass rate from 152 tests
79.8% MOT pass rate from 21,329 tests
The best year to buy a used Lexus RX400H is 2010, which has the highest MOT pass rate at 85.5% across 152 tests. The 2005 model year has the lowest pass rate at 79.8% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Lexus RX400H Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Lexus RX400H THIS CAR | 81.6% | 166,693 | 90,330 mi | 21 yrs |
| Lexus IS200 | 75.4% | 546,826 | 87,139 mi | 27 yrs |
| Lexus Ct | 86.8% | 304,916 | 55,351 mi | 15 yrs |
| Lexus RX300 | 79% | 229,652 | 83,424 mi | 26 yrs |
| BMW 735 | 73.1% | 51,279 | 109,744 mi | 41 yrs |
Compared to the Lexus IS200 (75.4% pass rate) and the Lexus Ct (86.8% pass rate), the Lexus RX400H sits in the middle of the pack on MOT reliability.
Found a Lexus RX400H you like?
Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific Lexus RX400HShould you buy a used Lexus RX400H?
The Lexus RX400H has an overall MOT pass rate of 81.6% across 166,693 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
The most common problems on the Lexus RX400H are tyre tread depth below requirements of 1.6mm (2,118 recorded failures), windscreen wiper does not clear the windscreen effectively (1,334), and tyre has a cut in excess of the requirements deep enough to reach the ply or cords (1,103). These are the faults most likely to cause an MOT failure on this model, so check for them carefully on any test drive or pre-purchase inspection. Many are wear-and-tear items that can be budgeted for, but a car that's already failing on multiple fronts may signal neglected maintenance.
On the safety side, the most frequently flagged dangerous fault is tyre tread depth below requirements of 1.6mm. Dangerous faults cause an immediate MOT failure and mean the vehicle is not roadworthy until repaired. If you're viewing a Lexus RX400H with an expired or recently passed MOT, ask the seller whether any dangerous faults were found and fixed during the last test.
A typical Lexus RX400H owner drives around 6,972 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
In terms of longevity, most Lexus RX400H models stay on UK roads for around 21 years — a strong showing that suggests solid build quality and readily available parts. If you're buying one that's already approaching that window, the data suggests it has plenty of life left provided it's been maintained.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.