The picture

Q5 S Ln Ed1 40tdi Mhev Quat Sa: a strong MOT record by UK norms

Across 1,939 MOT tests, the Q5 S Ln Ed1 40tdi Mhev Quat Sa returns 94.8% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is windscreen damage. A seriously damaged tyre and tyre tread under the limit round out the top three. Average tested mileage sits at 30,877, 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.

Filter failures:

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01

Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view

30 occurrences · 1.5% of tests
02

A tyre seriously damaged

20 occurrences · 1.0% of tests
03

Tyre tread depth not in accordance with the requirements

18 occurrences · 0.9% of tests
04

A tyre cords visible or damaged

9 occurrences · 0.5% of tests
05

Windscreen or window excessively tinted but not adversely affecting driver's view

8 occurrences · 0.4% of tests
06

Wiper blade missing or obviously not clearing the windscreen

7 occurrences · 0.4% of tests
07

Engine MIL illuminated indicating a malfunction

6 occurrences · 0.3% of tests
08

Smoke opacity levels exceed the manufacturer's specified limit

4 occurrences · 0.2% of tests
09

A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc

4 occurrences · 0.2% of tests
10

Windscreen washers not working or not providing sufficient fluid to clear the windscreen

3 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 2 failures

£120–£190

If every one of this Q5 S LN Ed1 40tdi Mhev 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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Build your own retest budget.

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

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

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Draper Expert

Draper Expert Oil Filter Socket for Audi, BMW, Mercedes-Benz, Porsche and VW

£18.69

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Draper Expert

Draper Expert Audi/VW Drain Plug Key, 1/2" Sq. Dr.

£21.99

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Click Mechanic · affiliate

Book a mobile mechanic

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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.

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Buying or keeping a Q5 S LN Ed1 40tdi Mhev 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 Q5 S LN Ed1 40tdi Mhev 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.