MOT cost .

Lexus

Is300

983 MOT tests analysed. lands in the middle of the pack — here's where Is300s pass, fail, and end up on the retest sheet.

That's 2.7 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

73.0%

Pass-after-fix

6.1%

Fail

19.1%

Avg miles

113,729

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

The picture

Is300: middle-of-the-pack on first-time pass

Across 983 MOT tests, the Is300 returns 73.0% first-time pass — below the UK fleet average. The single most-logged Major fail is a number-plate lamp out. A defective headlamp lens and windscreen damage round out the top three. Average tested mileage sits at 113,729, 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

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

    58 occurrences · 5.9% of tests

  2. 02

    Headlamp reflector or lens slightly defective

    45 occurrences · 4.6% of tests

  3. 03

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

    35 occurrences · 3.6% of tests

  4. 04

    The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired

    35 occurrences · 3.6% of tests

  5. 05

    A suspension joint dust cover severely deteriorated

    28 occurrences · 2.8% of tests

  6. 06

    A tyre cords visible or damaged

    26 occurrences · 2.6% of tests

  7. 07

    Tyre tread depth not in accordance with the requirements

    26 occurrences · 2.6% of tests

  8. 08

    A spring or spring component fractured or seriously weakened

    25 occurrences · 2.5% of tests

  9. 09

    A suspension pin, bush or joint excessively worn

    23 occurrences · 2.3% of tests

  10. 10

    The aim of a headlamp is not within limits laid down in the requirements

    22 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 3 failures

£98–£355

If every one of this Is300'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

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

Headlight restoration kit

Yellowed lenses fail the light-output test. A restoration kit lifts the haze in an afternoon for £20.

Search Amazon UK

Buying or keeping a Is300?

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 Is300 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.