MOT cost .

Lexus

Rx300

5,000 MOT tests analysed. lands in the middle of the pack — here's where Rx300s pass, fail, and end up on the retest sheet.

That's 3.3 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

72.4%

Pass-after-fix

5.0%

Fail

21.6%

Avg miles

120,132

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

The picture

Rx300: middle-of-the-pack on first-time pass

Across 5,000 MOT tests, the Rx300 returns 72.4% first-time pass — below the UK fleet average. The single most-logged Major fail is a defective headlamp lens. A torn suspension dust cover and the strength or continuity of the load bearing round out the top three. Average tested mileage sits at 120,132, 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

    Headlamp reflector or lens slightly defective

    295 occurrences · 5.9% of tests

  2. 02

    A suspension joint dust cover severely deteriorated

    205 occurrences · 4.1% of tests

  3. 03

    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

    184 occurrences · 3.7% of tests

  4. 04

    Obligatory mirror or device slightly damaged or loose

    179 occurrences · 3.6% of tests

  5. 05

    Engine MIL illuminated indicating a malfunction

    153 occurrences · 3.1% of tests

  6. 06

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

    139 occurrences · 2.8% of tests

  7. 07

    a brake lining or pad worn below 1.5mm

    137 occurrences · 2.7% of tests

  8. 08

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

    127 occurrences · 2.5% of tests

  9. 09

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

    123 occurrences · 2.5% of tests

  10. 10

    A suspension joint dust cover severely deteriorated

    105 occurrences · 2.1% 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–£380

If every one of this Rx300'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

Headlight restoration kit

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

Search Amazon UK

Item 02 · Amazon UK

Replacement wing mirror glass

A cracked mirror glass on the offside is a fail; nearside is an advisory. £8 of self-adhesive replacement glass clears it.

Search Amazon UK

Buying or keeping a Rx300?

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 Rx300 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.