90.1%
Aston Martin DB9
Aston Martin DB9 MOT pass rate and common problems
The Aston Martin DB9 passed 90.1% of its initial MOT tests in 2025, 17.8 percentage points above the 72.3% UK average. The item testers recorded most often was malfunction indicator lamp inoperative or indicates a malfunction.
Checking a specific car? Its own results, advisories and recorded mileages are in a free MOT history check.
How the DB9 compares
Initial MOT tests in 2025, retests excluded. A car that failed and was repaired at the test station counts as a fail.
92.1%
Aston Martin average
72.3%
UK average, all cars
The DB9 runs 2 points behind the Aston Martin average. It is 5th of the 6 Aston Martin models in the data. The average DB9 arrived at its test 17 years old with 41,066 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.
DB9 MOT pass rate by age
The same 2025 tests split by the car's age at test.
Aston Martin DB9 cars aged 6 to 10 years passed 97% of MOT tests. For cars aged 11 years and over that fell to 89.2%, a drop of 7.8 percentage points.
| Age at test | Tests | Pass rate | vs UK average |
|---|---|---|---|
| 6 to 10 years | 493 | 97% | 24.7 pts above |
| 11 years and over | 3,716 | 89.2% | 16.9 pts above |
That is a typical decline as cars age. The UK average of 72.3% covers cars of every age, so compare like with like.
Where DB9 failures cluster
Every failure item recorded on Aston Martin DB9 cars in 2025, grouped into the DVSA's test areas.
Lamps, reflectors and electrical equipment and brakes together account for 49.7% of recorded failure items. These are recorded failures across the model, not faults every car has.
The 10 most common DB9 MOT failures
Specific items recorded on Aston Martin DB9 cars that failed their 2025 MOT, as a share of all recorded failure items.
Together these 10 items make up 48.8% of everything testers recorded against failed Aston Martin DB9 cars. The rest is spread across many smaller items, and one failed test often records several at once.
What to look at on a DB9
The recorded failures above, grouped by area, biggest first.
1
Lamps, reflectors and electrical equipment
Recorded most often: position lamp not working and headlamp aim too low. 14.5% of failure items.
2
Visibility
Recorded most often: wipers does not clear the windscreen effectively, washers provides insufficient washer liquid and washers not working. 11.3% of failure items.
3
Noise, emissions and leaks
Recorded most often: malfunction indicator lamp inoperative or indicates a malfunction. 8.7% of failure items.
4
Suspension
Recorded most often: coil spring fractured or broken. 5.3% of failure items.
The car's own MOT history matters more than any model average. A free MOT history check shows whether a specific DB9 has failed on these items before, or had them noted as advisories. Buying one? See the used Aston Martin DB9 buying guide.
Already found one?
Check its finance, write-off, theft, mileage and keeper history with a £15 vehicle history report.
Aston Martin DB9 MOT FAQs
What is the Aston Martin DB9 MOT pass rate?
90.1% of Aston Martin DB9 cars passed their initial MOT first time in 2025, from 4,209 tests. That is 17.8 percentage points above the 72.3% average for all cars, and ranks 36th of 575 models.
What does an Aston Martin DB9 most commonly fail its MOT on?
The item testers recorded most often on Aston Martin DB9 cars failing their 2025 MOT was malfunction indicator lamp inoperative or indicates a malfunction, on 8.7% of failure items. Next were position lamp not working (8.7%) and wipers does not clear the windscreen effectively (6%).
Which area causes the most Aston Martin DB9 MOT failures?
Across every recorded failure item, the largest area was lamps, reflectors and electrical equipment at 33.2%, followed by brakes at 16.5%.
Do older Aston Martin DB9 cars fail their MOT more often?
Aston Martin DB9 cars aged 6 to 10 years passed 97% of MOT tests in 2025, against 89.2% for cars aged 11 years and over.
Does this mean every Aston Martin DB9 has these problems?
No. These are the items testers recorded across every Aston Martin DB9 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 Aston Martin DB9'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.