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Lexus Is300 vs Lexus Nx: reliability comparison

MOT pass rates, common faults and mileage compared from real UK MOT data.

Lexus Is300
78%
MOT pass rate · 2,037 vehicles
Lexus Nx
92%
MOT pass rate · 29,652 vehicles
More reliable
Verdict: On MOT pass rate, the Lexus Nx is the more reliable of the two — 92% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Head to head

Measure Lexus Is300 Lexus Nx
MOT pass rate 78% 92% ✓
MOT failure rate 22% 8% ✓
Faults & advisories per test 1.7 0.9 ✓
Dangerous-fault share 2% ✓ 3%
Average mileage 121,503 mi 54,657 mi
Sample size (vehicles) 2,037 29,652

Most common faults

Lexus Is300

  1. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  2. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  3. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  4. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  5. Rear Brake pad(s) wearing thin (3.5.1g)
  6. Front Brake pad(s) wearing thin (3.5.1g)

Lexus Nx

  1. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  4. Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  5. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  6. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Reliability FAQ

On MOT pass rate, the Lexus Nx is the more reliable of the two — 92% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Full Lexus Is300 report Full Lexus Nx report Most reliable cars

Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.