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Mg Mgb 1800 vs Mg Mgf: reliability comparison

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

Mg Mgb 1800
73%
MOT pass rate · 2 vehicles
Mg Mgf
67%
MOT pass rate · 41,973 vehicles
Verdict: On MOT pass rate the Mg Mgb 1800 (73%) and Mg Mgf (67%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Mg Mgb 1800 Mg Mgf
MOT pass rate 73% ✓ 67%
MOT failure rate 27% ✓ 33%
Faults & advisories per test 1.5 ✓ 2.5
Dangerous-fault share 0% ✓ 1%
Average mileage 72,991 mi 85,206 mi
Sample size (vehicles) 2 41,973

Most common faults

Mg Mgb 1800

  1. Exhaust mounting defective Rear exhaust box mounts failed but exhaust secure (6.1.2 (a))
  2. Steering rack gaiter damaged or deteriorated, but preventing the ingress of dirt Both steering rack gaitors (2.1.3 (g) (i))
  3. Tyre slightly damaged/cracking or perishing Both rear tyres (5.2.3 (d) (ii))
  4. Nearside Front brake disc excessively pitted (3.5.1h)
  5. Offside Front brake disc excessively pitted (3.5.1h)
  6. Exhaust emissions carbon monoxide content excessive (7.3.B.1a)

Mg Mgf

  1. Parking brake: efficiency below requirements (3.7.B.7)
  2. Exhaust emissions carbon monoxide content after 2nd fast idle excessive (7.3.D.3)
  3. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  4. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  5. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  6. Nearside Front Tyre worn close to the legal limit (4.1.E.1)

Reliability FAQ

On MOT pass rate the Mg Mgb 1800 (73%) and Mg Mgf (67%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Mg Mgb 1800 report Full Mg Mgf 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.