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Volvo Unknown vs Volvo Xc40 rdesign pro b5 mhev awd a: reliability comparison

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

Volvo Unknown
86%
MOT pass rate · 319,034 vehicles
Volvo Xc40 rdesign pro b5 mhev awd a
92%
MOT pass rate · 430 vehicles
More reliable
Verdict: On MOT pass rate, the Volvo Xc40 rdesign pro b5 mhev awd a is the more reliable of the two — 92% pass first time versus 86%. It's one signal among several; check the full breakdown below.

Head to head

Measure Volvo Unknown Volvo Xc40 rdesign pro b5 mhev awd a
MOT pass rate 86% 92% ✓
MOT failure rate 14% 8% ✓
Faults & advisories per test 0.7 0.7
Dangerous-fault share 4% ✓ 6%
Average mileage 431,427 mi 37,761 mi
Sample size (vehicles) 319,034 430

Most common faults

Volvo Unknown

  1. Oil leak, but not excessive (8.4.1 (a) (i))
  2. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Parking brake efficiency below requirements (1.4.2 (a) (i))
  5. Service brake efficiency below requirements (1.2.2 (a) (i))
  6. Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))

Volvo Xc40 rdesign pro b5 mhev awd a

  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 worn close to legal limit/worn on edge (5.2.3 (e))
  4. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))
  6. Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))

Reliability FAQ

On MOT pass rate, the Volvo Xc40 rdesign pro b5 mhev awd a is the more reliable of the two — 92% pass first time versus 86%. It's one signal among several; check the full breakdown below.

Full Volvo Unknown report Full Volvo Xc40 rdesign pro b5 mhev awd a 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.