Chrysler Jeep
300
7,647 MOT tests analysed. lands in the middle of the pack — here's where 300s pass, fail, and end up on the retest sheet.
That's 4.8 points below the UK fleet average across our 1,984 tracked models — buyers should expect more first-time fails than the typical UK car.
Pass
72.7%
Pass-after-fix
4.1%
Fail
22.0%
Avg miles
112,849
Pass + Pass-after-fix + Fail = 100%
Diesel cars registered before September 2015 are typically pre-Euro 6 — subject to daily charges in London ULEZ (£12.50), Birmingham CAZ (£8), Bristol CAZ (£9), and Glasgow LEZ. Daily charges if driven in the zone: London £12.50 · Birmingham £8.00 · Bristol £9.00 .
The picture
300: a below-average pass rate worth digging into
Across 4,841 MOT tests, the 300 returns 70.0% first-time pass — well below the UK fleet average. The single most-logged Major fail is worn suspension bushes. A torn suspension dust cover and parking brake efficiency less than 50% of the round out the top three. Average tested mileage sits at 111,635, 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.
ABI Insurance Group
Group 18–36
Above average — worth comparing quotes before buying. Lower groups cost less to insure; UK fleet average is around Group 22.
Source: ABI Group Rating Panel · administered by Thatcham Research · groups cover standard variants; performance trims may sit higher. Browse all insurance groups →
18–36
out of 50
Top ten reasons for rejection.
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- 01
A suspension pin, bush or joint excessively worn
424 occurrences · 5.5% of tests
- 02
A suspension joint dust cover severely deteriorated
386 occurrences · 5.0% of tests
- 03
A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources
356 occurrences · 4.7% of tests
- 04
Parking brake efficiency below minimum requirement
300 occurrences · 3.9% of tests
- 05
A steering ball joint with excessive wear or free play
280 occurrences · 3.7% of tests
- 06
Parking brake efficiency less than 50% of the required value
273 occurrences · 3.6% of tests
- 07
Parking brake inoperative on one side
231 occurrences · 3.0% of tests
- 08
A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
223 occurrences · 2.9% of tests
- 09
A suspension pin, bush or joint excessively worn
210 occurrences · 2.7% of tests
- 10
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
195 occurrences · 2.6% 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 4 failures
£248–£755
If every one of this 300'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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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.
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Buying or keeping a 300?
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 300 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.