Skip to content

Mg Mgb vs Mg Mgf: reliability comparison

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

Mg Mgb
77%
MOT pass rate · 2,572 vehicles
More reliable
Mg Mgf
67%
MOT pass rate · 41,973 vehicles
Verdict: On MOT pass rate, the Mg Mgb is the more reliable of the two — 77% pass first time versus 67%. It's one signal among several; check the full breakdown below.

Head to head

Measure Mg Mgb Mg Mgf
MOT pass rate 77% ✓ 67%
MOT failure rate 23% ✓ 33%
Faults & advisories per test 1.4 ✓ 2.5
Dangerous-fault share 0% ✓ 1%
Average mileage 52,977 mi 85,206 mi
Sample size (vehicles) 2,572 41,973

Most common faults

Mg Mgb

  1. Oil leak
  2. Parking brake: efficiency below requirements (3.7.B.7)
  3. Windscreen washer provides insufficient washer liquid (8.2.3)
  4. Exhaust emissions carbon monoxide content excessive (7.3.B.1a)
  5. Horn not working (1.6.2a)
  6. Offside Front wheel bearing has slight play (2.5.A.3c)

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 is the more reliable of the two — 77% pass first time versus 67%. It's one signal among several; check the full breakdown below.

Full Mg Mgb 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.