Aston Martin Db9: MOT pass rate and reliability data

The Aston Martin Db9 passes its MOT first time more often than the average UK car, by 14.3 percentage points. These figures come from the DVSA's full year of anonymised MOT results, covering 4,324 individual Aston Martin Db9 tests. Nothing here is an estimate or a survey.

The numbers

First-time pass rate91%
UK national average76.7%
Difference+14.3 points
Tests analysed4,324
Average mileage at test40,124 miles
Average year of manufacture2008
Reliability rank537 of 2,005 models

What this means if you are buying one

A 91% first-time pass rate means roughly 9 in every 100 Aston Martin Db9s presented for MOT fail on the first attempt. That is better than average, so a well-kept example is a reasonably safe used buy. The average Aston Martin Db9 tested had covered 40,124 miles and was built around 2008.

What this means at salvage auction

Pass rate is a proxy for what a car costs to keep on the road. The Aston Martin Db9 sits 14.3 points above the national average, ranked 537 of 2,005 models. On one bought as repairable salvage, the mechanical side is less likely to spring surprises, so your repair estimate should hold up reasonably well.

Before you bid: run the lot through the analyzer, check the car's own record, check the mileage, decode the VIN, and if it carries a marker use the write-off value calculator. Or compare it against another model.

Looking at a specific Aston Martin Db9 rather than the model in general? The free check covers its MOT and mileage history, and the full HPI report confirms the insurance write-off category, outstanding finance and whether it is recorded stolen, from licensed data for 5 credits. Already own one that has been damaged? Work out whether fixing it beats selling it with the repair or scrap calculator, and see recorded closing bids for damaged Aston Martin Db9s at UK salvage auction.

Most common MOT failures on a Aston Martin Db9

  1. Any fracture or welding defect on a wheel, 0.4% of tests (6.29x the national rate for this defect)
  2. Number plate does not conform to the specified requirements, 0.4% of tests (2.25x the national rate for this defect)
  3. A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 1.6% of tests
  4. The aim of a headlamp is not within limits laid down in the requirements, 1.5% of tests
  5. A spring or spring component fractured or seriously weakened, 1.2% of tests
  6. Engine MIL illuminated indicating a malfunction, 1.1% of tests
  7. Wiper blade missing or obviously not clearing the windscreen, 0.9% of tests
  8. A tyre seriously damaged, 0.8% of tests
  9. Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 0.8% of tests
  10. Tyre tread depth not in accordance with the requirements, 0.6% of tests

From 4,321 DVSA-tracked Aston Martin Db9 tests, 2024. DVSA testers marked 2.72% of these flagged Aston Martin Db9 defects as "dangerous", meaning the tester judged the car unsafe to drive away, against 5.11% nationally.

Most common MOT advisories on a Aston Martin Db9

An advisory doesn't fail the car - the tester flags it as worth watching, but it still passes. A different list from the failures above: what testers are noting on a Aston Martin Db9 before it actually fails on it.

  1. A brake hose ferrule excessively corroded, 4% of tests (3.13x the national rate for this advisory)
  2. A seat belt webbing or flexible stalk significantly stretched or weakened, 0.7% of tests (1.75x the national rate for this advisory)
  3. A tyre seriously damaged, 12.1% of tests, also fails
  4. Tyre tread depth not in accordance with the requirements, 11.2% of tests, also fails
  5. Brake pipe damaged or excessively corroded, 5.2% of tests
  6. a brake lining or pad worn below 1.5mm, 4.9% of tests
  7. Brake disc or drum excessively weakened, insecure or fractured, 4% of tests
  8. A shock absorber damaged to the extent that it does not function or showing signs of severe leakage, 2.9% of tests
  9. A suspension component excessively damaged or corroded, 2.2% of tests
  10. A spring or spring component fractured or seriously weakened, 1.1% of tests, also fails

From 4,321 DVSA-tracked Aston Martin Db9 tests, 2024.

Aston Martin Db9 pass rate by model year

From its 2005 to its 2008 model year, the Aston Martin Db9's first-time pass rate has risen 0.2 points, from 90.7% to 90.9%, the usual pattern: a newer model year is a younger car today, so it fails less. First-time pass rate for each Aston Martin Db9 year:

Other Aston Martin models

Models with a similar pass rate

If this car is a salvage or write-off

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Aston Martin Db9 MOT pass rate badge: 91%

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Aston Martin Db9 most common MOT failure: Any fracture or welding defect on a wheel (0.4% of tests)

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All 2,005 models ranked by MOT pass rate