MG B Gt
From 1,834 MOT tests. Above average for its class.
Common MOT failure categories
Pass rate by registration year
What goes wrong?
The most common MOT failure reasons are emissions levels exceed default limits, the aim of a headlamp is not within limits laid down in the requirements and steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc. The top issue, emissions levels exceed default limits, caused 53 failures in 2024. If you need repairs before retesting, sites like BookMyGarage let you compare local prices.
| emissions levels exceed default limits | 53 |
| the aim of a headlamp is not within limits laid down in the requirements | 42 |
| steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc | 42 |
| windscreen washers not working or not providing sufficient fluid to clear the windscreen | 40 |
| 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. | 39 |
| significant brake effort recorded with no brake applied indicating a binding brake | 28 |
| a headlamp or light source missing, inoperative or more than ½ not functioning in the case of led | 28 |
| a direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning | 26 |
| a suspension pin, bush or joint excessively worn | 26 |
| parking brake efficiency below minimum requirement | 24 |
How serious are these failures?
Not all MOT failures are equal. Only 33.6% of B Gt failures are serious (safety or roadside), below the 44.4% average. When this car fails its MOT, it's more likely to be lights, wipers, or emissions than something dangerous. When it does fail, the average repair bill is around £96.
By registration year
| Year | Pass rate | Top failures |
|---|---|---|
| 1981 | 76.7% | emissions levels exceed default limits, steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc |
| 1980 | 74% | emissions levels exceed default limits, body, cab or chassis excessively corroded at a mounting point |
| 1979 | 74.8% | emissions levels exceed default limits, the aim of a headlamp is not within limits laid down in the requirements |
| 1978 | 82.9% | emissions levels exceed default limits, 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. |
6 earlier years
| 1975 | 81.2% | significant brake effort recorded with no brake applied indicating a binding brake, audible warning inoperative |
| 1974 | 78.1% | the aim of a headlamp is not within limits laid down in the requirements, 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. |
| 1973 | 88.9% | the aim of a headlamp is not within limits laid down in the requirements, a headlamp or light source missing, inoperative or more than ½ not functioning in the case of led |
| 1972 | 85.9% | steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc, parking brake efficiency below minimum requirement |
| 1971 | 92.5% | windscreen washers not working or not providing sufficient fluid to clear the windscreen, significant brake effort recorded with no brake applied indicating a binding brake |
| 1970 | 84.5% | 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., a headlamp or light source missing, inoperative or more than ½ not functioning in the case of led |
Typical mileage
Half of all B Gts tested had between 17,545 and 67,087 miles on the clock.
At 42,439 median miles, the B Gt has 0.04 failures per 10,000 miles driven.
Other MG models
| MG Zs | 81.9% |
| MG 3 | 79.4% |
| MG Zs Exclusive Ev | 89.5% |
| MG Tf | 75% |
| MG Mgf | 72.8% |
Common questions
What is the MG B Gt MOT pass rate?
The MG B Gt has a 82.9% MOT pass rate based on 1,834 real MOT tests. This is above the national average.
What are common MOT failures on a MG B Gt?
The most common MOT failure on the MG B Gt is emissions levels exceed default limits, which caused 53 failures. Other common issues include the aim of a headlamp is not within limits laid down in the requirements.
What is the typical mileage of a MG B Gt at MOT?
The median mileage at MOT for a MG B Gt is 42,439 miles. The middle 50% of vehicles tested have between 17,545 and 67,087 miles.
Buying a used B Gt?
Start with the free tools. Look up the specific vehicle's MOT history on GOV.UK The mileage at each test will show if it's been wound back, and the advisory history tells you what's wearing. Cross-reference that against the typical failures above to see if anything looks unusual for this model.
The free data won't tell you about outstanding finance, theft markers, or write-off history. For that, you need a vehicle history check This is especially important on a private sale where you have fewer legal protections.
With a 82.9% pass rate and an average repair bill of £96 when things go wrong, budget accordingly.
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MOT data from DVSA anonymised test results, 2024 test year. Fleet data from DfT vehicle licensing statistics. Crown copyright, OGL v3.0. MOT pass rates are statistical summaries of test outcomes, not assessments of individual vehicle safety or condition. Always inspect a vehicle and check its full MOT history before purchasing. See terms of use.