MOT cost .

MG

B GT

1,607 MOT tests analysed. sits above the UK fleet average — here's where B GTs pass, fail, and end up on the retest sheet.

That's 4.5 points above the UK fleet average across our 1,988 tracked models — a confident result.

Pass

80.2%

Pass-after-fix

1.9%

Fail

16.7%

Avg miles

45,579

Pass + Pass-after-fix + Fail = 100%

The picture

B Gt: above-average pass rates, with caveats

Across 1,607 MOT tests, the B Gt returns 80.2% first-time pass — above the UK fleet average. The single most-logged Major fail is a lamp out. Emissions levels exceed default limits and a missing steering gaiter round out the top three. Average tested mileage sits at 45,579, which is the lens to read those failure rankings through. If you own one and the next test is close, the ranked list below is a sensible pre-test checklist.

Top ten reasons for rejection.

  1. 01

    A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning

    43 occurrences · 2.7% of tests

  2. 02

    Emissions levels exceed default limits

    35 occurrences · 2.2% of tests

  3. 03

    Steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc

    30 occurrences · 1.9% of tests

  4. 04

    Windscreen washers not working or not providing sufficient fluid to clear the windscreen

    30 occurrences · 1.9% of tests

  5. 05

    Audible warning inoperative

    26 occurrences · 1.6% of tests

  6. 06

    A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED

    25 occurrences · 1.6% of tests

  7. 07

    A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources

    25 occurrences · 1.6% of tests

  8. 08

    Brakes imbalance across an axle such that the braking effort from any wheel is less than 70% of the maximum effort recorded from the other wheel on the same axle.

    23 occurrences · 1.4% of tests

  9. 09

    Steering rack gaiter or ball joint dust cover damaged or deteriorated

    22 occurrences · 1.4% of tests

  10. 10

    Stop lamps all missing or inoperative

    22 occurrences · 1.4% of tests

Counts cover Major and Dangerous defects logged at test. Advisory items excluded so this shows why a car was rejected, not just what the tester flagged in passing.

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Buying or keeping a B GT?

Use the failure ranking as a pre-test checklist or a haggling lever. Treat the headline pass rate as a fleet-wide trend, not a guarantee on any individual car.

If you own a B GT and your last MOT looked nothing like the ranked failures above, that's normal — individual cars vary widely. The ranking shows the patterns testers flag most often across the country.