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Aston Martin DB9 2004: MOT failure rate for its age

14.8% of 1,361 MOT tests of the Aston Martin DB9 first registered in 2004 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 127.8 (95% CI 110.2–145.5; 100 = normal for this model at that age): the 2004 Aston Martin DB9 fails more often than other build years of the same model at the same age. This is a rough estimate from a smaller sample.

Aston Martin DB9 built in 2004 at a glance
MeasureValueUnitCompared withYearsTests
Failed first time14.8%all ages tested2019–20241361
Index against this model at the same age (95% CI 110.2–145.5)127.8index100 = normal for this model at that age2019–20241361
Rank among this model's 8 build years8of 81 = fails least for its age2019–20241361
Tested in 2024258testsmedian 48,896 miles2024258
line · Aston Martin DB9 built 2004 · first-time MOT failure share by age · built 2004 17.6% vs model normal 13.5% at age 15 · 2019–2024
Built 2004 against Aston Martin DB9 normal for the age: first-time MOT failure share at each age, age 15: 17.6% vs 13.5%; age 16: 15.4% vs 11.7%; age 17: 11.5% vs 11.1%; age 18: 17.3% vs 10.7%; age 19: 11.4% vs 10.5%; age 20: 15.5% vs n/a%. Axis from 0% to 20%. DVSA MOT bulk data, 2019–2024.
Check a 2004 Aston Martin DB9 by registration · All Aston Martin DB9 MOT statistics · Download the build-year table (CSV)

Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).

How does the 2004 Aston Martin DB9 fail at each age?

Cars built in 2004 were tested at ages 15 to 20 between 2019 and 2024. Each row compares their first-time failure share with what this model normally shows at that age, after allowing for the overall failure level of each test year.

Aston Martin DB9 built 2004: first-time MOT failure by age, against the model's normal rate at that age (2019–2024)
AgeTestsFailed, %95% intervalNormal for this model at that age, %Index (100 = normal)
15301 (rough estimate)17.613.7–22.313.5130.3
16253 (rough estimate)15.411.5–20.411.7131.5
17269 (rough estimate)11.58.2–15.911.1103.9
18283 (rough estimate)17.313.4–22.210.7161.3
19255 (rough estimate)11.48–15.910.5108.6
20258 (rough estimate)15.511.6–20.4not availablenot available

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 1,619 (initial tests) · Method: normal rate = this model's first-time failure share at that age across its build years (cells of 400+ tests), adjusted for each test year's overall level; cells of 30+ tests, under 500 marked rough · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

What fails most on the 2004 Aston Martin DB9?

The most common failure group on cars built in 2004 is lamps, reflectors and electrical equipment: 10.4 items per 100 first tests, against 6.8 across all build years of the Aston Martin DB9. These counts are not age-adjusted: cars built in 2004 were tested at ages 15 to 20.

Failure items per 100 first tests, Aston Martin DB9 built 2004 against the Aston Martin DB9 in all build years (2019–2024, not age-adjusted)
Failure groupBuilt 2004, per 100All build years, per 100Items
Lamps, reflectors and electrical equipment10.46.8168
Brakes5.33.186
Visibility4.53.873
Tyres3.52.457
Suspension3.41.955

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 1,619 (initial tests of this build year) · Method: failure items grouped by DVSA's top-level defect groups, per 100 initial tests; groups with 30+ items · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

How does 2004 compare with the years around it?

Among the 8 published build years of the Aston Martin DB9, 2004 ranks 8 (1 = fails least for its age). 2005: index 103.9.

Aston Martin DB9 build years: index against the model at the same age (2019–2024)
Build yearIndex (100 = normal)95% intervalVerdictTests
2004127.8110.2–145.5worse (rough estimate)1,361
2005103.996.5–111.3no different6,327
2006105.595.7–115.3no different (rough estimate)3,630
200799.190.1–108.1no different4,018
200884.574.6–94.4better (rough estimate)2,778
200973.659.1–88.1better (rough estimate)1,146
201094.274.2–114.2no different (rough estimate)780
201196.860.9–132.6no different (rough estimate)254

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 20,294 (initial tests) · Method: observed failures against those expected for the same model at the same ages, test-year level adjusted; verdict follows the printed one-decimal bound · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

How to cite this page

MOT Risk Index (2026). Aston Martin DB9 2004 MOT statistics (data release dvsa-2024-v2; full dataset motriskindex-families-2024-v5, DOI 10.5281/zenodo.22975051), updated 30 September 2026. motriskindex.co.uk/cars/aston-martin-db9/2004/

How every figure is calculated: methodology. Age, test year and build year are tied together (age = test year − build year), so the test-year level is taken as observed, not estimated.

Other pages for this model

Aston Martin DB9 2005 · Aston Martin DB9 2006 · Aston Martin DB9 2007 · Aston Martin DB9 2008 · Aston Martin DB9 2009 · Aston Martin DB9 2010 · Aston Martin DB9 2011 · Aston Martin DB9 by postcode area · Aston Martin DB9 body, chassis and structure failures · Aston Martin DB9 brakes failures · Aston Martin DB9 vehicle identification failures · Aston Martin DB9 lamps, reflectors and electrics failures · Aston Martin DB9 noise, emissions and leaks failures · Aston Martin DB9 road wheels failures · Aston Martin DB9 seat belts and airbags failures · Aston Martin DB9 steering failures · Aston Martin DB9 suspension failures · Aston Martin DB9 tyres failures · Aston Martin DB9 visibility failures