MOT reliability
Mg B
32,932 vehicles · 193,391 completed MOT tests analysed
78%
MOT pass rate
Based on 32,932 Mg B vehicles and 193,391 completed MOT tests, the Mg B has an overall 78% pass rate, with an average recorded mileage of 52,356 miles.
32,932
Vehicles
193,391
MOT tests
781
Avg miles / year
1.4
Faults per test
1%
Dangerous-fault share
Mg B problem areas
Where faults occur most across all Mg B MOT tests:
-
Other96%
-
Emissions & nuisance6%
-
Tyres, wheels & suspension6%
-
Steering6%
-
Brakes5%
-
Seatbelts & equipment4%
-
Lamps & electrical2%
-
Body & structure1%
Mg B pass rate by age
How the Mg B's MOT pass rate changes as it ages (buckets with 20+ tests).
| Age (years) | Tests | Pass rate |
|---|---|---|
| 1 | 79 | 80% |
| 2 | 88 | 76% |
| 3 | 104 | 76% |
| 4 | 102 | 79% |
| 5 | 99 | 83% |
| 6 | 124 | 81% |
| 7 | 146 | 84% |
| 8 | 164 | 80% |
| 9 | 205 | 80% |
| 10 | 200 | 83% |
| 11 | 201 | 83% |
| 12 | 241 | 79% |
| 13 | 229 | 79% |
| 14 | 271 | 78% |
| 15 | 269 | 81% |
| 16 | 283 | 81% |
| 17 | 292 | 79% |
| 18 | 290 | 78% |
| 19 | 270 | 80% |
| 20 | 253 | 79% |
Fuel types: Petrol (32,737), Other (184), Diesel (5), Electric (4), Gas (1), LPG (1)
Most common Mg B MOT faults
These are the faults and advisories recorded most often across Mg B MOT tests:
- Oil leak (5,255 times)
- Parking brake: efficiency below requirements (3.7.B.7) (3,743 times)
- Windscreen washer provides insufficient washer liquid (8.2.3) (3,275 times)
- Exhaust emissions carbon monoxide content excessive (7.3.B.1a) (3,169 times)
- Oil leak, but not excessive (8.4.1 (a) (i)) (2,898 times)
- Horn not working (1.6.2a) (2,740 times)
- Nearside Front wheel bearing has slight play (2.5.A.3c) (2,556 times)
- Offside Front wheel bearing has slight play (2.5.A.3c) (2,295 times)
- Nearside Front Axle king pin has slight play in pin and/or bush (2.5.A.3a) (2,259 times)
- Offside Front Axle king pin has slight play in pin and/or bush (2.5.A.3a) (2,146 times)
- Nearside Rear Shock absorber has a light misting of oil (2.7.3) (1,700 times)
- Exhaust emissions hydrocarbon content excessive (7.3.B.1b) (1,583 times)
- Brakes imbalanced across an axle (3.7.B.5b) (1,523 times)
- Offside Rear Shock absorber has a light misting of oil (2.7.3) (1,511 times)
- Nearside Front Shock absorber has a light misting of oil (2.7.3) (1,500 times)
Mg B pass rate by registration year
| Year | Vehicles | Tests | Pass rate | Avg mileage |
|---|---|---|---|---|
| 2021 | 2 | 8 | 75% | 59,951 |
| 2020 | 1 | 2 | 50% | 51,611 |
| 2019 | 3 | 5 | 80% | 58,473 |
| 2018 | 10 | 39 | 72% | 36,869 |
| 2017 | 10 | 21 | 71% | 45,720 |
| 2016 | 5 | 21 | 76% | 52,849 |
| 2015 | 10 | 62 | 79% | 43,864 |
| 2014 | 7 | 54 | 72% | 56,793 |
| 2013 | 5 | 33 | 85% | 28,074 |
| 2012 | 9 | 67 | 70% | 38,542 |
| 2011 | 2 | 12 | 92% | 35,415 |
| 2010 | 3 | 25 | 56% | 96,672 |
| 2009 | 1 | 12 | 75% | 2,508 |
| 2008 | 1 | 1 | 0% | 57,803 |
| 2007 | 4 | 37 | 78% | 72,942 |
| 2006 | 17 | 203 | 83% | 53,786 |
| 2005 | 10 | 75 | 76% | 25,704 |
| 2004 | 13 | 149 | 83% | 40,234 |
| 2003 | 15 | 158 | 85% | 36,645 |
| 2002 | 19 | 240 | 87% | 45,833 |
| 2001 | 18 | 201 | 82% | 48,019 |
| 2000 | 19 | 244 | 76% | 60,407 |
| 1999 | 39 | 461 | 78% | 47,575 |
| 1998 | 27 | 304 | 81% | 42,994 |
| 1997 | 39 | 449 | 83% | 48,385 |
| 1996 | 31 | 349 | 80% | 59,142 |
| 1995 | 26 | 276 | 82% | 46,139 |
| 1994 | 21 | 216 | 81% | 43,182 |
| 1993 | 26 | 315 | 76% | 46,032 |
| 1992 | 34 | 338 | 80% | 50,144 |
| 1991 | 31 | 363 | 78% | 47,525 |
| 1990 | 27 | 294 | 77% | 50,282 |
| 1989 | 19 | 249 | 77% | 45,541 |
| 1988 | 14 | 156 | 74% | 61,350 |
| 1987 | 5 | 82 | 71% | 48,320 |
| 1986 | 11 | 150 | 78% | 55,757 |
| 1985 | 9 | 80 | 79% | 42,447 |
| 1984 | 20 | 212 | 80% | 65,009 |
| 1983 | 34 | 365 | 77% | 42,775 |
| 1982 | 98 | 1,221 | 76% | 57,868 |
| 1981 | 682 | 7,931 | 76% | 62,421 |
| 1980 | 641 | 7,069 | 75% | 58,586 |
| 1979 | 976 | 9,529 | 74% | 59,467 |
| 1978 | 1,596 | 15,127 | 75% | 59,254 |
| 1977 | 1,172 | 10,949 | 73% | 56,148 |
| 1976 | 803 | 7,090 | 73% | 55,970 |
| 1975 | 894 | 7,545 | 76% | 51,622 |
| 1974 | 1,109 | 10,189 | 79% | 55,469 |
| 1973 | 1,791 | 18,434 | 79% | 52,780 |
| 1972 | 1,982 | 20,932 | 80% | 51,332 |
| 1971 | 1,725 | 16,800 | 79% | 48,705 |
| 1970 | 1,187 | 12,271 | 80% | 48,956 |
| 1969 | 819 | 8,562 | 81% | 47,337 |
| 1968 | 576 | 5,959 | 81% | 48,893 |
| 1967 | 785 | 8,160 | 80% | 45,957 |
| 1966 | 701 | 7,118 | 81% | 43,242 |
| 1965 | 504 | 4,812 | 82% | 47,771 |
| 1964 | 455 | 4,414 | 80% | 44,325 |
| 1963 | 266 | 2,480 | 82% | 47,749 |
| 1962 | 19 | 111 | 89% | 37,235 |
| 1960 | 1 | 20 | 75% | 36,324 |
| 1959 | 1 | 10 | 80% | 3,870 |
| 1956 | 1 | 1 | 100% | 86,202 |
| 1951 | 1 | 1 | 100% | 95,608 |
| 1940 | 1 | 4 | 50% | 47,285 |
| 1907 | 1 | 9 | 56% | 23,751 |
Mg B reliability FAQ
Across 32,932 Mg B vehicles in our MOT data,
78% pass the MOT (a 22% failure rate), with about
1.4 faults or advisories recorded per test.
The most frequently recorded Mg B MOT issues are:
Oil leak; Parking brake: efficiency below requirements (3.7.B.7); Windscreen washer provides insufficient washer liquid (8.2.3).
The typical Mg B in our data has covered around
52,356 miles.
Compare the Mg B
See how the Mg B stacks up against other Mg models on MOT reliability:
Check a specific Mg B
Enter a registration to see that exact vehicle's full MOT history, advisories and recurring faults.
See all Mg models · Learn about common MOT failures · what an MOT checks