83.6%
Ford Mustang
Ford Mustang MOT pass rate and common problems
The Ford Mustang passed 83.6% of its initial MOT tests in 2025, 11.3 percentage points above the 72.3% UK average. The item testers recorded most often was rbt (sp) efficiency below requirements.
Checking a specific car? Its own results, advisories and recorded mileages are in a free MOT history check.
How the Mustang compares
Initial MOT tests in 2025, retests excluded. A car that failed and was repaired at the test station counts as a fail.
68.8%
Ford average
72.3%
UK average, all cars
The Mustang runs 14.8 points ahead of the Ford average. It is 5th of the 27 Ford models in the data. The average Mustang arrived at its test 10 years old with 39,396 miles recorded.
A pass rate records whether cars met the roadworthiness standard on test day. It is not a reliability score, and part of any gap reflects how old the tested cars were.
Mustang MOT pass rate by age
The same 2025 tests split by the car's age at test.
Ford Mustang cars aged 3 to 5 years passed 86.6% of MOT tests. For cars aged 11 years and over that fell to 82.4%, a drop of 4.2 percentage points.
| Age at test | Tests | Pass rate | vs UK average |
|---|---|---|---|
| 3 to 5 years | 2,297 | 86.6% | 14.3 pts above |
| 6 to 10 years | 7,355 | 82.6% | 10.3 pts above |
| 11 years and over | 2,335 | 82.4% | 10.1 pts above |
That is a smaller decline than most cars show. The UK average of 72.3% covers cars of every age, so compare like with like.
Where Mustang failures cluster
Every failure item recorded on Ford Mustang cars in 2025, grouped into the DVSA's test areas.
Brakes and lamps, reflectors and electrical equipment together account for 50.3% of recorded failure items. These are recorded failures across the model, not faults every car has.
The 10 most common Mustang MOT failures
Specific items recorded on Ford Mustang cars that failed their 2025 MOT, as a share of all recorded failure items.
Together these 10 items make up 47.5% of everything testers recorded against failed Ford Mustang cars. The rest is spread across many smaller items, and one failed test often records several at once.
What to look at on a Mustang
The recorded failures above, grouped by area, biggest first.
1
Brakes
Recorded most often: rbt (sp) efficiency below requirements, parking brake performance inoperative on one side and rbt (sp) efficiency less than 50% of the required value. 18.9% of failure items.
2
Tyres
Recorded most often: condition has ply or cords exposed, tread depth below requirements of 1.6mm and condition has a cut in excess of the requirements deep enough to reach the ply or cords. 13.7% of failure items.
3
Visibility
Recorded most often: wipers does not clear the windscreen effectively and washers provides insufficient washer liquid. 9.3% of failure items.
4
Suspension
Recorded most often: ball joint excessively worn. 2.9% of failure items.
The car's own MOT history matters more than any model average. A free MOT history check shows whether a specific Mustang has failed on these items before, or had them noted as advisories. Buying one? See the used Ford Mustang buying guide.
Already found one?
Check its finance, write-off, theft, mileage and keeper history with a £15 vehicle history report.
Ford Mustang MOT FAQs
What is the Ford Mustang MOT pass rate?
83.6% of Ford Mustang cars passed their initial MOT first time in 2025, from 12,307 tests. That is 11.3 percentage points above the 72.3% average for all cars, and ranks 147th of 575 models.
What does a Ford Mustang most commonly fail its MOT on?
The item testers recorded most often on Ford Mustang cars failing their 2025 MOT was rbt (sp) efficiency below requirements, on 8.7% of failure items. Next were condition has ply or cords exposed (7%) and parking brake performance inoperative on one side (6.1%).
Which area causes the most Ford Mustang MOT failures?
Across every recorded failure item, the largest area was brakes at 32.1%, followed by lamps, reflectors and electrical equipment at 18.2%.
Do older Ford Mustang cars fail their MOT more often?
Ford Mustang cars aged 3 to 5 years passed 86.6% of MOT tests in 2025, against 82.4% for cars aged 11 years and over.
Does this mean every Ford Mustang has these problems?
No. These are the items testers recorded across every Ford Mustang that failed in 2025. They show where the model most often needs attention, not the condition of any individual car.
How do I see a specific Ford Mustang's MOT history?
Enter its registration on the free Carpeep MOT history check to see that car's own test results, failures, advisories and recorded mileages.
MOT figures are aggregated from the DVSA MOT Anonymised data set for 2025: class 4 initial tests, retests excluded, with failure items from failed tests (advisories and minor defects excluded), licensed under the Open Government Licence v3.0. MOT results describe roadworthiness at test, not mechanical reliability.