MOT fail · manual section 7.1.1

Seat belt prescribed area strength or continuity significantly reduced

What this MOT fail means, how often testers record it and what the usual repair costs. From 130,233,413 DVSA MOT tests taken 2022 to 2025.

MOT data updated 28 September 2026

As a fail, per 100 MOTs (n=130,233,413)0.18

Most often at25 years

Times recorded240,070

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 a major defect: the car fails its MOT. A major defect may affect the car’s safety, put other road users at risk or harm the environment. The car fails its MOT and the defect must be repaired.

Before it reaches this point, testers often record it as an advisory: Seat belt prescribed area is corroded but not considered excessive.

Seat belts are checked for condition, security and operation, and the airbag and seat belt warning lamps are checked too.

The MOT inspection manual describes the defect (section 7.1.1) as:

The strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired

Read this section of the MOT inspection manual on GOV.UK

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
Fail Major	Prescribed areas	prescribed area strength or continuity significantly reduced (7.1.1)	240,070

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 25 years: 1.77 per 100 MOTs (n=313,355 tests at that age).

Per 100 MOT tests of cars at each age, all makes. We show no figure below 20 tests.
Age	Fail per 100	Tests (n)
3 years	0	8,016,463
4 years	0	8,699,937
5 years	0.001	9,425,360
6 years	0.001	10,382,720
7 years	0.002	10,537,318
8 years	0.004	10,440,457
9 years	0.009	9,949,012
10 years	0.021	9,049,507
11 years	0.046	8,087,514
12 years	0.094	7,303,151
13 years	0.16	6,612,160
14 years	0.29	6,054,526
15 years	0.42	5,591,675
16 years	0.57	4,858,625
17 years	0.72	4,040,458
18 years	0.83	3,261,622
19 years	0.92	2,479,858
20 years	1.03	1,845,952
21 years	1.14	1,321,417
22 years	1.27	913,980
23 years	1.45	619,531
24 years	1.62	428,815
25 years	1.77	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 a fail, 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
Citroen XsaraCitroen Xsara corrosion welding repair	6.27	0.76	8.2	125,734	12 to 24
Chevrolet Lacetti	2.68	0.35	7.7	8,136	13 to 17
Ford Transit ConnectFord Transit Connect corrosion welding repair	1.92	0.25	7.5	676,611	3 to 22
Ford KaFord Ka corrosion welding repair	0.87	0.14	6.1	743,190	3 to 23
London Taxis International TX4London Taxis International TX4 corrosion welding repair	0.69	0.12	5.9	53,539	5 to 16
Chevrolet Kalos	2.75	0.50	5.5	9,354	15 to 18
Suzuki JimnySuzuki Jimny corrosion welding repair	2.45	0.48	5.0	98,308	3 to 25
Chevrolet Matiz	1.91	0.38	5.0	44,172	12 to 19
Citroen NemoCitroen Nemo corrosion welding repair	0.76	0.17	4.5	57,536	6 to 16
Daihatsu Terios	2.16	0.49	4.3	14,631	14 to 19
Ford Pumafirst used before 2019	5.49	1.31	4.1	8,309	21 to 25
Ford TransitFord Transit corrosion welding repair	0.85	0.21	4.0	1,227,954	3 to 25
Jaguar X-TypeJaguar X-Type corrosion welding repair	3.09	0.78	3.9	111,254	13 to 23
Citroen C2	2.00	0.55	3.6	49,932	13 to 21
Kia Sedona	2.02	0.63	3.1	21,149	12 to 19
Ford Escort	4.65	1.61	2.8	6,428	22 to 25
Mazda MX-5Mazda MX-5 corrosion welding repair	1.29	0.45	2.8	348,258	3 to 25
Suzuki Grand VitaraSuzuki Grand Vitara corrosion welding repair	1.63	0.57	2.8	89,823	9 to 23
Mazda Bongo	1.97	0.70	2.8	35,066	6 to 25
Honda FR-V	1.64	0.59	2.7	29,995	13 to 19

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

The usual repair is corrosion welding repair.

No public source records the price of this whole job, and the time it takes varies from car to car, so we do not publish a single figure. Garages charge by the hour, so ask for a quote that lists labour time and parts. The rates below are what UK garages charge per hour.

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.

Corrosion welding repair: cost and the models that need it more often

Related MOT defects

Airbag (SRS) warning lamp indicates a fault0.47 per 100
Seat belt webbing slightly damaged or frayed0.24 per 100
Seat belt buckle not functioning as intended0.11 per 100
Seat belt buckle slightly damaged0.094 per 100
Seat belt not functioning as intended0.083 per 100
Seat belt slightly damaged0.072 per 100
Airbag (SRS) warning lamp does not illuminate0.039 per 100
Seat belt retracting mechanism defective0.037 per 100
Seat belt buckle missing0.028 per 100
Seat belt webbing significantly weakened0.022 per 100

All other equipment defects All MOT defects Car repair costs

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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