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Vauxhall Insig sri nav vx 158 cdti vs Vauxhall Zafira: reliability comparison

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

Vauxhall Insig sri nav vx 158 cdti
76%
MOT pass rate · 45 vehicles
More reliable
Vauxhall Zafira
72%
MOT pass rate · 574,048 vehicles
Verdict: On MOT pass rate, the Vauxhall Insig sri nav vx 158 cdti is the more reliable of the two — 76% pass first time versus 72%. It's one signal among several; check the full breakdown below.

Head to head

Measure Vauxhall Insig sri nav vx 158 cdti Vauxhall Zafira
MOT pass rate 76% ✓ 72%
MOT failure rate 24% ✓ 28%
Faults & advisories per test 1.7 ✓ 2.1
Dangerous-fault share 5% 2% ✓
Average mileage 130,546 mi 116,941 mi
Sample size (vehicles) 45 574,048

Most common faults

Vauxhall Insig sri nav vx 158 cdti

  1. Oil leak, but not excessive (8.4.1 (a) (i))
  2. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Offside Rear coil spring broken (2.4.C.1a)
  6. Offside Rear Coil spring corroded (5.3.1 (b) (i))

Vauxhall Zafira

  1. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  2. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  3. Oil leak, but not excessive (8.4.1 (a) (i))
  4. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  5. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  6. Child seat fitted not allowing full inspection of adult belt

Reliability FAQ

On MOT pass rate, the Vauxhall Insig sri nav vx 158 cdti is the more reliable of the two — 76% pass first time versus 72%. It's one signal among several; check the full breakdown below.

Full Vauxhall Insig sri nav vx 158 cdti report Full Vauxhall Zafira 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.