Lexus RX450H Reliability: Common Problems and Years to Avoid
What the Lexus RX450H fails its MOT on, with rough repair costs, and how each model year's MOT pass rate compares with other cars of the same age. Based on 12,833 MOT tests across 10 model years (DVSA data for tests carried out in 2024, retests included).
Segment: premium performance | Fuel: Hybrid
86%
Lexus RX450H pass rate
87%
Lexus average
82%
All-model average
The Lexus RX450H has an average MOT pass rate of 86%, which is 1 point below the Lexus average and 4 points above the average across all models in our data. Newer Lexus RX450Hs pass their MOT more often than older ones, by 7 percentage points on average, which is mostly down to age and wear.
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What the Lexus RX450H Fails Its MOT On
Of the 1,696 MOT tests on the Lexus RX450H that failed at the first attempt in 2025, the share that failed on each part of the test, next to the share for all cars and vans of the same ages. A test that failed on two areas counts in both.
Lights and electrics
43%Cars and vans the same age: 46% · Typical repair £15-£200
Suspension
41%Cars and vans the same age: 41% · Typical repair £150-£600
Tyres
21%Cars and vans the same age: 18% · Typical repair £50-£300
Brakes
18%Cars and vans the same age: 24% (the RX450H fails on this less often) · Typical repair £80-£450
Windscreen, wipers and mirrors
12%Cars and vans the same age: 15% · Typical repair £10-£350
The 3 single faults it failed on most
- Position lamp: not working (29% of failed tests, lights and electrics)
- Steering linkage ball joint dust cover no longer keeps dirt out (10% of failed tests, suspension)
- Shock absorber has a serious fluid leak (8.3% of failed tests, suspension)
Source: CarCostCheck analysis of DVSA anonymised MOT test results and failure items for 2025: first attempt at each MOT, fail and pass-after-repair defects, DVSA's defect categories (names shortened). Repair costs are rough UK ranges, not quotes. Method and national figures: MOT failure reasons 2025.
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Lexus RX450H Years to Avoid
Every car in the 2024 MOT data was tested at the same age as the other cars first registered that year, so each RX450H year is compared with all cars from the same year. Years with 1,000+ tests that were at least three years old are included.
Failed more often than cars their age
No year passed 3 or more points less often than other cars of the same age.
A lower pass rate means that year failed its MOT more often in 2024; it does not mean every car from that year is bad. Old cars still on the road are often the best-kept ones, which can lift the pass rates of the oldest years. How a car has been looked after matters more, so check the MOT history of the car you are looking at.
Lexus RX450H Reliability by Year
MOT pass rate for each model year, from DVSA data for tests carried out in 2024 (retests included). Newer cars usually pass more often simply because they are younger. All Cars is the pass rate of every car first registered that year, with the gap in points. Highest and lowest are marked among years with 100+ tests that were at least three years old when tested. Fuel and engine size are a guide only.
Lexus RX450H Running Costs
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Lexus RX450H FAQ
What are the most common Lexus RX450H problems?
In 2025, MOT tests on the Lexus RX450H that failed at the first attempt most often failed on lights and electrics (43% of the 1,696 failed tests), suspension (41%) and tyres (21%). The single most common fault was "Position lamp: not working" (29%). Across 12,833 MOT tests (DVSA MOT data for tests in 2024, retests included), 86% ended in a pass.
Is the Lexus RX450H reliable?
The Lexus RX450H has an average MOT pass rate of 86%, from 12,833 MOT tests (DVSA MOT data for tests in 2024, retests included). Comparing each model year with all cars first registered the same year, so that age is allowed for, it passed 10 points more often on average, a better than average result for its age.
Which Lexus RX450H years should I avoid?
No Lexus RX450H year with 1,000+ tests passed 3 or more points less often than all cars first registered the same year (DVSA MOT data for tests in 2024, retests included). The years that passed most often for their age were the 2010 (86% of 4,300 tests passed, against 75% for all 2010 cars), the 2009 (85% of 2,273 tests passed, against 75% for all 2009 cars) and the 2011 (86% of 3,038 tests passed, against 77% for all 2011 cars). A year's pass rate does not tell you about one car, so check the MOT history of the car you are buying.
How much does it cost to fix common Lexus RX450H faults?
As a rough guide, brake work on a Lexus RX450H typically costs £80-£450 and suspension repairs £150-£600, while exhaust and emissions fixes can cost £80-£800. Lighting and wiper fixes are usually under £200.
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Other Lexus Models
Common problems pages for other Lexus models