The picture
A6 S Ln Blk Ed 45 Tfsi Quat Sa: a strong MOT record by UK norms
Across 469 MOT tests, the A6 S Ln Blk Ed 45 Tfsi Quat Sa returns 93.0% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is windscreen damage. Tyre tread under the limit and a seriously damaged tyre round out the top three. Average tested mileage sits at 29,032, 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.
Top ten reasons for rejection.
- 01
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
18 occurrences · 3.8% of tests
- 02
Tyre tread depth not in accordance with the requirements
14 occurrences · 3.0% of tests
- 03
A tyre seriously damaged
5 occurrences · 1.1% of tests
- 04
Number plate does not conform to the specified requirements
4 occurrences · 0.9% of tests
- 05
A tyre cords visible or damaged
4 occurrences · 0.9% of tests
- 06
a brake lining or pad worn below 1.5mm
3 occurrences · 0.6% of tests
- 07
Wiper blade defective
3 occurrences · 0.6% of tests
- 08
Engine MIL illuminated indicating a malfunction
3 occurrences · 0.6% of tests
- 09
Number plate showing an incorrect registration
2 occurrences · 0.4% of tests
- 10
Wiper blade missing or obviously not clearing the windscreen
2 occurrences · 0.4% 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 3 failures
£135–£225
If every one of this A6 S LN Blk ED 45 Tfsi Quat SA'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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Tools that pre-empt a retest.
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
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
Item 02 · Amazon UK
MOT-spec replacement number plate
Faded or non-standard plates fail outright. Replacements take ten minutes online with V5C details.
Search Amazon UK
Buying or keeping a A6 S LN Blk ED 45 Tfsi Quat SA?
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 A6 S LN Blk ED 45 Tfsi Quat SA 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.