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Austin Heavy 12 vs Austin Montego l: reliability comparison

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

Austin Heavy 12
95%
MOT pass rate · 10 vehicles
Austin Montego l
69%
MOT pass rate · 153,789 vehicles
Verdict: On MOT pass rate the Austin Heavy 12 (95%) and Austin Montego l (69%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Austin Heavy 12 Austin Montego l
MOT pass rate 95% ✓ 69%
MOT failure rate 5% ✓ 31%
Faults & advisories per test 0.2 ✓ 2.0
Dangerous-fault share 0% 0%
Average mileage 6,426 mi 87,961 mi
Sample size (vehicles) 10 153,789

Most common faults

Austin Heavy 12

  1. Drop link to drag link joint worn
  2. Nearside Front Leaf spring has slight wear in a shackle pin and/or bush (2.4.B.2)
  3. Nearside Rear Leaf spring has slight wear in a shackle pin and/or bush (2.4.B.2)
  4. Offside Front Leaf spring has slight wear in a shackle pin and/or bush (2.4.B.2)
  5. Offside Rear Leaf spring has slight wear in a shackle pin and/or bush (2.4.B.2)
  6. Front position lamp(s) not working (1.1.A.3b)

Austin Montego l

  1. Oil leak
  2. Offside Rear Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
  3. Exhaust emissions carbon monoxide content excessive (7.3.B.1a)
  4. Nearside Rear Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
  5. Parking brake: efficiency below requirements (3.7.B.7)
  6. oil leak

Reliability FAQ

On MOT pass rate the Austin Heavy 12 (95%) and Austin Montego l (69%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Austin Heavy 12 report Full Austin Montego l 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.