MOT cost .

MG

6

2,760 MOT tests analysed. runs below the UK fleet average — here's where 6s pass, fail, and end up on the retest sheet.

That's 8.3 points below the UK fleet average across our 1,988 tracked models — buyers should expect more first-time fails than the typical UK car.

Pass

67.4%

Pass-after-fix

4.9%

Fail

27.0%

Avg miles

68,225

Pass + Pass-after-fix + Fail = 100%

The picture

6: a below-average pass rate worth digging into

Across 2,760 MOT tests, the 6 returns 67.4% first-time pass — well below the UK fleet average. The single most-logged Major fail is a corroded brake pipe. A number-plate lamp out and tyre tread under the limit round out the top three. Average tested mileage sits at 68,225, 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.

  1. 01

    Brake pipe damaged or excessively corroded

    292 occurrences · 10.6% of tests

  2. 02

    A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources

    175 occurrences · 6.3% of tests

  3. 03

    Tyre tread depth not in accordance with the requirements

    104 occurrences · 3.8% of tests

  4. 04

    A suspension pin, bush or joint excessively worn

    103 occurrences · 3.7% of tests

  5. 05

    a brake lining or pad worn below 1.5mm

    81 occurrences · 2.9% of tests

  6. 06

    A suspension pin, bush or joint excessively worn

    78 occurrences · 2.8% of tests

  7. 07

    A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED

    73 occurrences · 2.6% of tests

  8. 08

    Wiper blade missing or obviously not clearing the windscreen

    66 occurrences · 2.4% of tests

  9. 09

    A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning

    65 occurrences · 2.4% of tests

  10. 10

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

    60 occurrences · 2.2% 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 5 failures

£268–£620

If every one of this 6'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 →

Try the calculator

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

H7 / W21W bulb pack

A spare-bulb kit lives in the boot. Test morning is not the time to find your stop-lamp's gone.

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

Item 03 · Amazon UK

Brake pad measurement gauge

Testers fail pads under 1.5mm. A wear gauge tells you if you've got two months left or two weeks.

Search Amazon UK

Buying or keeping a 6?

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 6 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.