The picture
Cbf 125 M-B: middle-of-the-pack on first-time pass
Across 1,256 MOT tests, the Cbf 125 M-B returns 73.2% first-time pass — below the UK fleet average. The single most-logged Major fail is a stop-lamp out. Tyre tread under the limit and transmission belt, chain round out the top three. Average tested mileage sits at 19,261, 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.
- 01
Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
26 occurrences · 2.1% of tests
- 02
Tyre tread depth not in accordance with the requirements
26 occurrences · 2.1% of tests
- 03
A transmission belt, chain, sprocket or pulley excessively loose or worn
26 occurrences · 2.1% of tests
- 04
Brake lining or pad worn below 1.0mm
24 occurrences · 1.9% of tests
- 05
Steering head bearings excessively stiff, notchy, or with excessive wear or play
22 occurrences · 1.8% of tests
- 06
The aim of a headlamp is not within limits laid down in the requirements
19 occurrences · 1.5% of tests
- 07
A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
17 occurrences · 1.4% of tests
- 08
Reflector missing or reflecting white to the rear
17 occurrences · 1.4% of tests
- 09
A stop lamp(s) does not illuminate by the operation of both brake controls or remains on when the brakes are released
17 occurrences · 1.4% of tests
- 10
A headlamp missing, inoperative or more than ½ not functioning in the case of LED
16 occurrences · 1.3% 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
£238–£480
If every one of this Cbf 125 M B'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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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 Cbf 125 M B?
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 Cbf 125 M B 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.