MOT advisory

Gearbox mounting defective

What this MOT advisory means, how often testers record it and what garages charge per hour. From 130,233,413 DVSA MOT tests taken 2022 to 2025.

MOT data updated 28 September 2026

As an advisory, per 100 MOTs (n=130,233,413)0.074

Most often at18 years

Times recorded96,440

Times recorded adds every DVSA code with this wording, so a test can record it more than once, for example on two wheels under separate codes.

What it means

This is an advisory: the car passes its MOT, and the tester is warning about the part. It is one of DVSA’s standard advisory notes and is not tied to a section of the current MOT inspection manual. The car passes its MOT.

The DVSA codes counted on this page: the manual item and the defect text as DVSA records them. The heading above joins the two, as a certificate does; the tester also adds the position, such as nearside front.
Result	Manual item	DVSA defect text	Records
Advisory	Non-component advisories	Gearbox mounting defective	96,440

Got an MOT advisory or defect on a certificate? Paste it into the MOT advisory checker to see what it means.

How common it is by age

Testers record it most at 18 years: 0.22 per 100 MOTs (n=3,261,622 tests at that age).

Per 100 MOT tests of cars at each age, all makes. We show no figure below 20 tests.
Age	Advisory per 100	Tests (n)
3 years	0.002	8,016,463
4 years	0.005	8,699,937
5 years	0.009	9,425,360
6 years	0.017	10,382,720
7 years	0.027	10,537,318
8 years	0.039	10,440,457
9 years	0.053	9,949,012
10 years	0.061	9,049,507
11 years	0.071	8,087,514
12 years	0.085	7,303,151
13 years	0.10	6,612,160
14 years	0.13	6,054,526
15 years	0.17	5,591,675
16 years	0.19	4,858,625
17 years	0.21	4,040,458
18 years	0.22	3,261,622
19 years	0.21	2,479,858
20 years	0.21	1,845,952
21 years	0.19	1,321,417
22 years	0.16	913,980
23 years	0.14	619,531
24 years	0.12	428,815
25 years	0.086	313,355

Models that get it most

Each model generation is compared with cars of the same ages and fuel, so older and diesel models are not penalised for their age or fuel. Generations are never pooled.

Model generations with the highest rate as an advisory, against cars of the same ages and fuel. A model’s figure counts this defect only at ages where it is among that model’s 25 most recorded items, and as zero elsewhere, so it is a floor. Tests (n) are all the generation’s MOT tests at ages with at least 1,000 tests each; at least 5,000 in total.
Model	Per 100 MOTs, at least	Same ages and fuel	Times as often	Tests (n)	Ages
Mitsubishi Shogun Sport	0.59	0.23	2.5	18,439	16 to 21
Smart Fortwo	0.19	0.096	2.0	255,596	3 to 23

Read this with care. A fail rate is not a measure of build quality. How far cars are driven, how they are used and how well owners maintain them all change it, and wear items such as tyres and brake pads are common fails. Compare a model only with cars of the same age. Methodology and limits.

Repair and cost

We do not map this defect to one repair job, because the fix depends on the cause. Garages charge by the hour, so ask for a quote that lists labour time and parts.

Local garage labour, per hour (65 shops)£78

Local garage, middle half£70 to £96

Main dealer labour, per hour (62 shops)£156

Main dealer, middle half£144 to £174

Median hourly rate charged for car repairs, from 1,058 local garage and 953 main dealer price quotes collected by the ONS, September 2025 to August 2026. The same shops are priced each month, so the number of shops is the real sample.

Related MOT defects

Child Seat fitted not allowing full inspection of adult belt2.03 per 100
Nail in tyre1.85 per 100
Play in steering rack inner joint(s)1.37 per 100
Items removed from drivers view prior to test0.68 per 100
Coolant leak0.24 per 100
Vehicles internal headlight adjuster altered to recheck lights0.21 per 100
Fuel Pipe/s corroded0.19 per 100
Non obligatory mirror damaged0.089 per 100
Passenger seat(s) missing at time of test0.072 per 100
Spare tyre defective0.060 per 100

All other advisories and older defect codes defects All MOT defects Car repair costs

Buying a used car?

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Source

Contains public sector information licensed under the Open Government Licence v3.0. Source: DVSA anonymised MOT test data, class 4 normal MOT tests, 2022 to 2025, and the MOT inspection manual published on GOV.UK. Prices: ONS consumer price inflation price quotes, September 2025 to August 2026, UK.

MOT data updated 28 September 2026. Prices updated 22 September 2026.

Not affiliated with or endorsed by DVSA or the Office for National Statistics. How we calculate these figures · Data sources