League table/BSA
Make report · 2005–2025
BSA
91.1%
first-time pass rate
3.6%
failed outright
118k
MOT tests, 2005–2025
BSA at a glance
Most reliable model
RGS
97.0% pass
Least reliable model
LIGHTENING
84.7% pass
Most tested model
A10
10.2k tests
Among BSA models with ≥ 100 tests.
What fails a BSA
failure defects across all BSA models · advisories excluded
lighting and signalling is BSA's most common failure — 1.6% of all BSA tests record one.
| Component group | Share of defects | % of tests | Worst offenders |
|---|---|---|---|
| lighting and signalling |
|
1.6 | see ranking |
| steering and suspension |
|
1.4 | see ranking |
| brakes |
|
1 | see ranking |
| tyres and wheels |
|
0.7 | see ranking |
| fuel and exhaust |
|
0.3 | see ranking |
Top failure groups aggregated across every BSA model, 2005–2025. "% of tests" = share of the make's tests recording at least one defect in that group.
BSA models, ranked by test volume
top 60 of 92 models (≥ 100 tests), 2005–2025 · by volume
| Model | Pass rate | Pass % | Fail % | Median miles | Tests |
|---|---|---|---|---|---|
| A10 |
|
91.6 | 3.2 | 12,005 | 10,227 |
| BANTAM |
|
88.7 | 5.4 | 13,194 | 7,201 |
| C15 |
|
89.2 | 5.3 | 14,164 | 5,892 |
| A65 |
|
90.9 | 3.9 | 10,198 | 5,064 |
| B31 |
|
92.0 | 3.1 | 15,803 | 3,429 |
| B40 |
|
90.6 | 3.5 | 8,069 | 3,360 |
| A7 |
|
92.3 | 2.6 | 10,424 | 3,264 |
| GOLD STAR |
|
93.5 | 1.7 | 5,024 | 3,109 |
| SUPER ROCKET |
|
93.6 | 1.9 | 6,389 | 1,548 |
| GOLD FLASH |
|
92.6 | 2.7 | 11,717 | 1,316 |
| M20 |
|
91.4 | 2.5 | 7,746 | 1,295 |
| A50 |
|
89.6 | 3.7 | 13,154 | 1,282 |
| STARFIRE |
|
90.5 | 3.3 | 11,348 | 1,254 |
| B33 |
|
91.8 | 2.9 | 11,124 | 1,120 |
| THUNDERBOLT |
|
91.3 | 2.8 | 14,618 | 1,094 |
| M21 |
|
92.6 | 2.3 | 22,787 | 996 |
| ROCKET 3 |
|
93.4 | 2.8 | 12,550 | 973 |
| 650 |
|
91.8 | 2.4 | 7,773 | 901 |
| B25 |
|
88.5 | 4.1 | 9,304 | 886 |
| D7 |
|
85.7 | 6.4 | 14,996 | 828 |
| LIGHTNING |
|
92.2 | 3.0 | 10,620 | 794 |
| GOLDEN FLASH |
|
92.3 | 3.6 | 12,964 | 714 |
| SHOOTING STAR |
|
93.3 | 3.4 | 11,743 | 668 |
| ROCKET GOLD STAR |
|
94.8 | 0.8 | 2,340 | 633 |
| A65L |
|
91.0 | 2.1 | 10,394 | 619 |
| B44 |
|
90.1 | 3.9 | 8,728 | 618 |
| A65T |
|
89.7 | 2.6 | 15,857 | 609 |
| C12 |
|
91.7 | 4.7 | 12,950 | 553 |
| C11 |
|
86.9 | 7.2 | 9,900 | 457 |
| D14 |
|
89.4 | 3.4 | 13,095 | 445 |
| DBD34 |
|
93.7 | 1.2 | 3,834 | 431 |
| A65 LIGHTNING |
|
89.4 | 3.8 | 5,794 | 398 |
| D1 |
|
87.5 | 5.4 | 11,600 | 391 |
| A7SS |
|
90.6 | 2.1 | 6,130 | 385 |
| B175 |
|
92.8 | 3.2 | 13,862 | 375 |
| BSA |
|
90.0 | 5.4 | 7,693 | 369 |
| ROYAL STAR |
|
90.6 | 3.0 | 13,334 | 361 |
| BANTOM |
|
90.9 | 6.2 | 12,850 | 339 |
| A10 SUPER ROCKET |
|
93.1 | 1.8 | 14,421 | 335 |
| ROCKET |
|
93.1 | 3.3 | 6,466 | 331 |
| SPITFIRE |
|
89.9 | 3.7 | 3,956 | 326 |
| 500 |
|
95.1 | 3.4 | 11,336 | 326 |
| SR500 |
|
93.5 | 2.8 | 3,999 | 325 |
| D10 |
|
91.6 | 3.7 | 14,040 | 323 |
| C11G |
|
89.5 | 4.6 | 8,720 | 304 |
| BANTUM |
|
91.8 | 3.8 | 20,149 | 293 |
| B50 |
|
91.0 | 2.5 | 5,324 | 279 |
| ROAD ROCKET |
|
90.9 | 2.9 | 6,298 | 275 |
| 350 |
|
95.1 | 1.1 | 10,609 | 266 |
| VICTOR |
|
90.0 | 3.8 | 7,437 | 260 |
| D14/4 |
|
86.0 | 4.3 | 14,369 | 257 |
| B25SS |
|
88.3 | 5.7 | 7,144 | 247 |
| M33 |
|
93.0 | 2.5 | 8,784 | 244 |
| 250 |
|
89.8 | 2.5 | 9,157 | 244 |
| A7 SHOOTING STAR |
|
94.8 | 2.2 | 8,734 | 231 |
| TRIBSA |
|
90.0 | 3.9 | 6,580 | 231 |
| WM20 |
|
93.0 | 2.2 | 7,254 | 230 |
| BANTAM D7 |
|
86.9 | 7.0 | 11,826 | 229 |
| A65 THUNDERBOLT |
|
90.4 | 3.9 | 10,200 | 229 |
| A10 GOLDFLASH |
|
88.2 | 2.7 | 9,590 | 220 |
Normal tests only. Median miles is odometer reading at test where recorded. Looking for a specific model? Search all BSA models. Source: DVSA anonymised MOT results, 2005–2025.