LEXUS NX (2021)
Running costs, reliability data, and common problems from 7,761 real MOT tests.
Annual Cost
£2,042
£170/month
MOT Pass Rate
97%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 25-38
2494cc Hybrid
Great Choice
97% pass rate, £2042/year to run. 15 points above average.
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Annual Running Costs
~30 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Excellent reliability. Very few MOT failures. That's 15 points above the national average of 82%. It also outperforms the LEXUS brand average of 87%.
At 5 years old, 97% of LEXUS NXs from 2021 passed their MOT first time in 2026. That's based on 7,761 tests across the UK. The average mileage at this age is 23,811 miles.
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How Does It Compare?
Mileage Analysis
23,811
Average miles
37,000
Expected for age
The average 2021 LEXUS NX has 23,811 miles on the clock, which is below the expected 37,000 miles for a 5-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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LEXUS NX by Year
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About the 2021 LEXUS NX
The 2021 LEXUS NX is a premium with a 2494cc hybrid engine. 7,761 of these vehicles were MOT tested in 2026, making it a reasonably common sight on UK roads. It ranks in the top 8% of all 2021 cars for reliability.
With an average of 23,811 miles at 5 years old, LEXUS NX owners tend to use this car less than the typical driver.
2021 LEXUS NX Fuel Costs
The 2494cc hybrid engine offers a reasonable balance between performance and economy. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current hybrid prices of 142p per litre (based on 7,400 miles per year). As a hybrid, real-world fuel costs will vary significantly depending on how much electric-only driving you do.
What does it cost to own a 2021 LEXUS NX?
Total estimated annual running cost is £2,042 (£170/month), broken down as £1592 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 97% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
LEXUS NX Reliability Trend
The LEXUS NX has maintained consistent MOT pass rates across model years, varying by only 3 percentage points.
Buying a Used 2021 LEXUS NX
At 5 years old, the LEXUS NX offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. With 7,761 MOT tests in our data, there's strong statistical confidence in these figures.
Common Issues to Watch For
Based on the 2021 LEXUS NX's fuel type, age, and engine size, these are the most likely problem areas to check.
Hybrid Battery Health
Medium riskAfter 5 years, hybrid battery capacity may have reduced. A full replacement costs £2,000-£4,000, though reconditioning is cheaper at £500-£1,500.
Inverter and Power Electronics
Low riskThe inverter converts DC to AC for the electric motor. Failures are expensive (£1,500+) but relatively rare. Listen for unusual buzzing sounds.
Regenerative Braking
Medium riskBrake discs can corrode from reduced use (the electric motor handles most braking). Surface rust is normal but deep pitting needs attention.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2021 LEXUS NX stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| LEXUS NX(2021) | 97% | £1592 | £195 | Grp 25-38 | £2042 |
| LAND ROVER RANGE ROVER SPORT(2019) | 94% | £1327 | £190 | Grp 18-32 | £1772-£270 |
| TOYOTA RAV4(2020) | 95% | £1592 | £190 | Grp 25-38 | £2037-£5 |
| LAND ROVER RANGE ROVER(2019) | 94% | £1327 | £190 | Grp 18-32 | £1772-£270 |
| BMW 330E M SPORT AUTO(2021) | 88% | £1327 | £190 | Grp 18-32 | £1922-£120 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
Related Lexus Models
Explore other Lexus cars or similar models in the same category.
LEXUS UX
2021 · 1987cc Hybrid
LEXUS CT
2012 · 1798cc Electric
LEXUS IS
2014 · 2493cc Petrol
LAND ROVER RANGE ROVER SPORT
2019 · 1997cc Hybrid
TOYOTA RAV4
2020 · 2500cc Hybrid
LAND ROVER RANGE ROVER
2019 · 1997cc Hybrid
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