Aston Martin
1,491 MOT tests analysed. sits above the UK fleet average — here's where Dbx V8 Autos pass, fail, and end up on the retest sheet.
That's 19.5 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
97.0%
Pass-after-fix
1.0%
Fail
1.7%
Avg miles
23,135
Pass + Pass-after-fix + Fail = 100%
Petrol cars first registered from January 2006 meet Euro 4 — compliant in London ULEZ, Birmingham CAZ, Bristol CAZ, and Glasgow LEZ.
Performance by cohort
2 year bands · 1,491 tests
Pass rate is broadly flat across the cohorts — new and old Dbx V8 Auto examples track each other at the test bay.
Pass
97.6%
Fail
1.2%
PRS
0.8%
Avg mileage at test
26,432 mi
Pass
96.7%
Fail
2.0%
PRS
1.1%
Avg mileage at test
21,500 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.
The picture
Across 1,491 MOT tests, the Dbx V8 Auto returns 97.0% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is a seriously damaged tyre. Headlamp aim out of spec and tyre tread under the limit round out the top three. Average tested mileage sits at 23,135, which is the lens to read those failure rankings through. If you own one and the next test is close, the ranked list below is a sensible pre-test checklist.
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A tyre seriously damaged
18 occurrences · 1.2% of tests
The aim of a headlamp is not within limits laid down in the requirements
8 occurrences · 0.5% of tests
Tyre tread depth not in accordance with the requirements
6 occurrences · 0.4% of tests
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
2 occurrences · 0.1% of tests
Excessive fluctuation in brake effort through each wheel revolution.
1 occurrences · 0.1% of tests
Number plate does not conform to the specified requirements
1 occurrences · 0.1% of tests
The aim of a headlamp is not within limits laid down in the requirements
1 occurrences · 0.1% of tests
A tyre cords visible or damaged
1 occurrences · 0.1% of tests
Lambda coefficient outside the default limits or the range specified by the manufacturer
1 occurrences · 0.1% of tests
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
1 occurrences · 0.1% of tests
Counts cover Major and Dangerous defects logged at test. Advisory items excluded so this shows why a car was rejected, not just what the tester flagged in passing.
Worst-case fix budget · top 2 failures
£70–£175
If every one of this Dbx V8 Auto's most-logged Major fails hit at the same MOT, that's the real-world UK garage range. Reality is usually one or two items, not all of them. Open the estimator →
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Build your own retest budget.
Year-band analysis
First-time MOT pass rate split by registration band. Pass rates barely move across bands here, so the year you buy Aston Martin Dbx V8 Auto makes little measurable difference to MOT outcomes.
Best band to buy
97.6%
2018–2020 registration
the 2018–2020 band climbs to 97.6% — a 0.9-point improvement. Failures here are mostly wear items: tread depth below requirements of 1.6mm, damaged but not adversely affecting driver's view — the structural issues that drag down older examples don't appear in the top-10 for this band.
Band to be cautious about
96.7%
2021+ registration
On the 2021-on band, the data shows a 96.7% pass rate against a fleet average of 97.6% on the newer band. The main culprits logged at test: has a cut in excess of the…, too high, and tread depth below requirements of 1.6mm. Average mileage on test for this band is 21,500 miles — high-mileage wear items are a recurring theme.
Best band to buy: 2018-2020 (97.6% first-time pass). Worst band to avoid: 2021+ (96.7% pass). That's a 0.9-point spread across 996 older tests and 495 newer ones — year of build makes a material difference on this model.
Picked against this car's top failure patterns. Affiliate links to Amazon UK — we earn a small cut at no cost to you. Disclosed up-front, doesn't shape the data.
Item 01 · Amazon UK
Headlight restoration kit
Yellowed lenses fail the light-output test. A restoration kit lifts the haze in an afternoon for £20.
Search Amazon UK
Item 02 · Amazon UK
Digital tyre-tread depth gauge
Five quid for a gauge beats £150 for a retest. UK MOT minimum is 1.6mm — most testers fail anything below 2mm to be safe.
Search Amazon UK
My Motor World · affiliate
Affiliate links — small commission, no extra cost to you.
Click Mechanic · affiliate
Affiliate links — small commission, no extra cost to you.
Mobile mechanic · UK-wide
Book a mechanic at your door.
Fixed-price quotes upfront. No garage needed. Click Mechanic sends a vetted local mechanic to you — home, work, or roadside.
Use the failure ranking as a pre-test checklist or a haggling lever. Treat the headline pass rate as a fleet-wide trend, not a guarantee on any individual car.
If you own a Dbx V8 Auto and your last MOT looked nothing like the ranked failures above, that's normal — individual cars vary widely. The ranking shows the patterns testers flag most often across the country.
