Morris Minor Series II/MM/Series III (1948-1971) reliability
Morris Minor Series II/MM/Series III built before 2000: fails its MOT less often than average
Morris Minor Series II/MM/Series IIIs built before 2000 fail their MOT less often than similar cars the same age. An independent inspection matters more than the wider numbers on cars this old.
Looking at a Morris Minor Series II/MM/Series III?
Enter its number plate to see its full MOT history, risk rating and running costs.
Key figure
18% of MOT tests on Morris Minor Series II/MM/Series IIIs built before 2000 ended in a fail (retests included), against 24% for similar cars the same age.
Most common issue
The most common MOT issue on Morris Minor Series II/MM/Series IIIs built before 2000 involves fluid leaks.
Based on 937 tests of Minor models registered 1948-1971.
About 1 in 10 Minor Series II/MM/Series III MOTs (9.3%) failed and still hadn't passed 3 days later. That's for cars built before 2000 (over 25 years old), all fuels combined.
Based on 937 tests (DVSA MOT results, 2025), a small sample, so the figure is likely between 7.6% and 11.3%. A fail that passed a retest within 3 days, even the same day, isn't counted. Nor is a fail with no later MOT on record.
About 1 in 25 Minor Series II/MM/Series III MOTs (4.3%) found at least one dangerous defect. These are cars built before 2000 (over 25 years old).
Based on 937 tests (DVSA MOT results, 2025), a small sample, so the figure is likely between 3.2% and 5.8%. Dangerous is the most serious grade an MOT gives: a direct risk to road safety.
Series II/MM/Series III fail rate by age
Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs. Highest fail rate at 25+ years old.
How the Minor Series II/MM/Series III compares
At each age below, see how the Minor Series II/MM/Series III holds up against other cars the same age. The averages combine all fuel types.
Based on 2,254 tests across 2 Morris models, built before 2000 (over 25 years old).
Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs.
What to check before viewing
The model's most common MOT issues, turned into things you can ask about or look for.
Leaks
Worth checkingInspect the leaks carefully and ask the seller for repair history.
Brakes
Worth checkingInspect the brakes carefully and ask the seller for repair history.
Tyres
Worth checkingCheck tread depth across the full width on all four; uneven wear suggests alignment or suspension issues.
Suspension
Worth checkingInspect the suspension carefully and ask the seller for repair history.
Vehicle-specific check
Worth checkingCheck the car’s number plate on MOT Wise to see its own MOT history and any recalls for its build years.
Other saloons to compare
Other saloons, with each one's figures taken at the same age as the Minor Series II/MM/Series III.
- 1
Nissan Skyline
Same body type, tested at the same age
- Fail rate
- 10.7%
- Fail, no pass in 3 days
- 5.8%
- Dangerous
- 2.1%
Lower fail rate: 10.7%, against 17.7% for the Morris Minor Series II/MM/Series III, both built before 2000.
1,007 MOT tests on cars built before 2000
- 2
Saab 9-3
Same body type, tested at the same age
- Fail rate
- 26.9%
No clear edge over the Morris Minor Series II/MM/Series III on these figures.
Some figures could not be compared for these two cars. So this comparison uses the fail rate and recalls only.
1,327 MOT tests on cars built before 2000
- 3
BMW 3 Series
Same body type, tested at the same age
- Fail rate
- 22.8%
- Still registered at 10 years
- 89.8%
No clear edge over the Morris Minor Series II/MM/Series III on these figures.
15 critical recall campaigns matching this model/build period.
17,892 MOT tests on cars built before 2000
- 4
BMW 5 Series
Same body type, tested at the same age
- Fail rate
- 25.8%
- Still registered at 10 years
- 82.6%
No clear edge over the Morris Minor Series II/MM/Series III on these figures.
12 critical recall campaigns matching this model/build period.
4,939 MOT tests on cars built before 2000
- Fail rate
- = the share of MOT tests that ended in a fail. Retests count as tests.
- Fail, no pass in 3 days
- = the share of MOT tests that failed and still hadn't passed 3 days later. A fail that passed a retest within 3 days, even the same day, isn't counted.
- Dangerous
- = the share of MOT tests where the tester marked a fault as dangerous. It is against the law to drive the car until it is fixed.
- Still registered at 10 years
- = the share of cars still registered (taxed or declared off the road) 10 years after they were first registered.
Recall context
DVSA's recall list has no recalls filed under the Morris Minor name. For the exact car, check with the maker or GOV.UK's recall checker.
What has gone wrong on Minor Series II/MM/Series III cars built before 2000
The share of petrol cars that have ever failed an MOT on each part of the car. Based on 781 cars.
Rust, which the MOT calls corrosion: 25% of these cars show rust-related issues at this age.
Check the sills, subframe and brake pipes before you decide.
Series II/MM/Series III variants compared
Minor Series II/MM/Series III variants built before 2000
The fail rate for each Minor Series II/MM/Series III variant, grouped by fuel. Each row counts fails per MOT test, the same way as the main fail rate chart.
Petrol
- MINOR 100018.6%1,246 tests
- MINOR17.1%806 tests
Most common issues on Morris Minors of this age
This list covers every Morris Minor built before 2000, whichever generation it is. We don't have a defect list for the Series II/MM/Series III on its own.
Most common advisories and fails
In order of the share of MOT tests that recorded each one
- 113.8%Advisory
Oil leak, but not excessive
- 26.4%Major
Brakes uneven from one side to the other
- 35.8%Advisory
Brake binding slightly
- 44.4%Advisory
Tyre slightly damaged, cracking or perishing
- 54.4%Advisory
Suspension arm pin or bush worn, but not moving too much
Based on 982 tests
Looking at a Morris Minor Series II/MM/Series III?
Enter its number plate to see its full MOT history, risk rating and running costs.
Frequently asked questions
Built before 2000 (over 25 years old), the Morris Minor Series II/MM/Series III (1948-1971) fails MOTs noticeably less often than typical for this age. This is based on 937 25+ year old MOT tests from DVSA data. Each retest counts as a test.