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Suzuki Alto vs Suzuki Sz4: reliability comparison

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

Suzuki Alto
74%
MOT pass rate · 84,396 vehicles
Suzuki Sz4
77%
MOT pass rate · 5 vehicles
Verdict: On MOT pass rate the Suzuki Alto (74%) and Suzuki Sz4 (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Suzuki Alto Suzuki Sz4
MOT pass rate 74% 77% ✓
MOT failure rate 26% 23% ✓
Faults & advisories per test 2.1 1.7 ✓
Dangerous-fault share 2% 0% ✓
Average mileage 68,875 mi 74,315 mi
Sample size (vehicles) 84,396 5

Most common faults

Suzuki Alto

  1. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  3. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  5. Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  6. Offside Front Brake pipe corroded, covered in grease or other material (1.1.11 (c))

Suzuki Sz4

  1. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  2. Front Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
  3. Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  4. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Suspension component mounting prescribed area is corroded but not considered excessive Front Cross Member (5.3.6 (a) (i))
  6. Offside Rear Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))

Reliability FAQ

On MOT pass rate the Suzuki Alto (74%) and Suzuki Sz4 (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Suzuki Alto report Full Suzuki Sz4 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.