Audi
Q4 E Tron S Line 40
3,109 MOT tests analysed. sits above the UK fleet average — here's where Q4 E Tron S Line 40s pass, fail, and end up on the retest sheet.
That's 12.6 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
90.1%
Pass-after-fix
0.9%
Fail
8.5%
Avg miles
30,749
Pass + Pass-after-fix + Fail = 100%
Electric and hydrogen vehicles are exempt from all UK clean air zone charges.
The picture
Q4 E-Tron S Line 40: a strong MOT record by UK norms
Across 3,109 MOT tests, the Q4 E-Tron S Line 40 returns 90.1% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is a tyre with the cords showing. A seriously damaged tyre and windscreen damage round out the top three. Average tested mileage sits at 30,749, 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.
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- 01
A tyre cords visible or damaged
109 occurrences · 3.5% of tests
- 02
A tyre seriously damaged
89 occurrences · 2.9% of tests
- 03
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
37 occurrences · 1.2% of tests
- 04
Tyre tread depth not in accordance with the requirements
36 occurrences · 1.2% of tests
- 05
Wiper blade defective
20 occurrences · 0.6% of tests
- 06
An SRS malfunction indicator lamp (MIL) indicates a system malfunction
10 occurrences · 0.3% of tests
- 07
Wiper blade missing or obviously not clearing the windscreen
9 occurrences · 0.3% of tests
- 08
Tyres on the same axle or on twin wheels are different sizes
6 occurrences · 0.2% of tests
- 09
Number plate does not conform to the specified requirements
6 occurrences · 0.2% of tests
- 10
A tyre not fitted in compliance with the manufacturers sidewall instruction
6 occurrences · 0.2% 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
£140–£235
If every one of this Q4 E Tron S Line 40'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
Bosch Aerotwin wiper blades
Cheap wipers fail the test on smear streaks. Bosch Aerotwins last a winter and clear a screen properly.
Search Amazon UK
My Motor World · affiliate
Parts & supplies for this fix
Affiliate links — small commission, no extra cost to you.
Summit
Summit ADRG-215 Audi Replacement Stick-On Tinted Mirror Glass RHS
£9.89
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Summit
Summit ADRG-216 Audi Replacement Stick-On Tinted Mirror Glass LHS
£14.29
View at My Motor World →
Draper Expert
Draper Expert Oil Filter Socket for Audi, BMW, Mercedes-Benz, Porsche and VW
£18.69
View at My Motor World →
Draper Expert
Draper Expert Audi/VW Drain Plug Key, 1/2" Sq. Dr.
£21.99
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EV King · affiliate
EV charging & accessories
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EV Charging Cables
8M - 32amp (3 Phase)- Blaupunkt Type 2 Charging Cable 32amp - 3 Phase (22kW) 8M
£329.00
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EV Charging Cables
15M - 32amp -Type 2 to Type 2 Charging Cable Type 2 to Type 2 15M 32amp (7.4kW)
£315.00
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EV Charging Cables
3 Pin to Type 2 - 10M - Range Rover Evoque Charging Cable 3 Pin to Type 2 10M 6-12amp Adjustable (2.3kW)
£297.00
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EV Charging Cables
3 Pin to Type 2 - 10M - Range Rover Sport Charging Cable 3 Pin to Type 2 10M 6-12amp Adjustable (2.3kW)
£297.00
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Book a mobile mechanic
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Mobile mechanic · UK-wide
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Buying or keeping a Q4 E Tron S Line 40?
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 Q4 E Tron S Line 40 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.