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1 Abbreviations and definitions
2 Application (Classes 3, 4, 5 and 7)
3 Vehicles of historical interest (over 40 years old)
4 Refusal to test
5 Narrow track vehicles
6 Vehicle 'first used' dates – Application of test criteria
7 The MOT Inspection Manual
8 Vehicle technical data
9 The MOT Testing Guide
10 Assessment of component condition
11 Definition of insecure
12 Unsafe modification
13 Extensively modified vehicles
14 Inspection procedure
15 Road testing
16 Disabled driver's controls
17 Health and safety
18 Recording defects
19 Retest following failure
|Abbreviation or term||Definition|
|abandon||When a test can't be completed because the tester thinks it's unsafe to continue or because it becomes apparent during the test that certain items can't be satisfactorily inspected. An appropriate fee may be charged for the test.|
|abort||When a test can't be completed because of a problem with the test equipment or the tester. No fee may be charged for the test.|
|AE||Authorised Examiner – the organisation that operates and manages one or more VTS and is responsible for controlling the quality of testing carried out. Except in the case of a 'sole trader' the AE isn't a person but a legal entity, such as a company or partnership.|
|ATL||Automated test lane – lanes authorised by DVSA which use wheel play detectors and an automated roller brake tester|
|bodied vehicles||A bodied vehicle has a floor pan and surrounding panels. The vehicle may or may not have a roof. As a guide, if the driver sits in the vehicle with surrounding structure it would be classed as bodied.|
|bus||A motor vehicle which is constructed or adapted to carry more than 8 seated passengers (see also 'minibus')|
|category L2 vehicle||A three-wheeled vehicle (tricycle) classed as a moped – a maximum speed not exceeding 45km/h, not more than 50cc for spark ignition engine or 4KW for any other power unit|
|category L5 vehicle||A three-wheeled vehicle (tricycle) more than 50cc and/or a maximum speed greater than 45km/h|
|category L6 vehicle||Light quadricycle – four-wheeled vehicle with a maximum unladen mass of 350kg (not including the batteries in an electrically powered vehicle) a maximum speed not exceeding 45km/h, not more than 50cc for spark ignition engine or 4KW for any other power unit.|
|category L7 vehicle||Quadricycle – a four-wheeled vehicle with a maximum unladen mass 400kg or 550kg for a goods vehicle (not including the batteries in an electrically powered vehicle) and a maximum net power of 15KW (21BHP).|
|category M1 vehicle||A vehicle with 4 or more wheels used for the carriage of passengers, with no more than 8 passenger seats in addition to the driver's seat. This includes dual purpose vehicles, motor caravans and ambulances, but doesn't include quadricycles.|
|category M2 vehicle||A vehicle with 4 or more wheels used for the carriage of passengers, with more than 8 passenger seats in addition to the driver's seat and a maximum DGW not exceeding 5,000kg. This includes dual purpose vehicles, motor caravans and ambulances.|
|category M3 vehicle||A vehicle with 4 or more wheels used for the carriage of passengers, with more than 8 passenger seats in addition to the driver's seat and a maximum DGW exceeding 5,000kg|
|category N1 vehicle||A vehicle with 4 or more wheels used for the carriage of goods and having a DGW not exceeding 3,500kg|
|coach||A motor vehicle constructed or adapted to carry more than 16 seated passengers, with a DGW of more than 7,500kg and a maximum speed in excess of 60mph|
|CT||Contingency testing – the test process using paper documentation when the online MOT testing service isn't available|
|CT20||An MOT test certificate issued during a period of contingency testing|
|CT30||A refusal of an MOT test certificate issued during a period of contingency testing|
|DGW||Design gross weight – the maximum gross weight that the vehicle was designed to operate at by the manufacturer. This is normally found on the manufacturer's plate fixed to the vehicle, or in some older or heavier vehicles on a `ministry plate'.|
|DVSA||The Driver and Vehicle Standards Agency|
|insecure||A component has relative movement (looseness) at its fixings where there should be none, a component has relative movement (looseness) to an associated component where there should be none, or a component critical to safety isn't safely or completely attached at its fixing or to an associated component|
|large Class 4||A Class 4 vehicle with a DGW greater than 2,500kg|
|MAM||Maximum authorised mass – the maximum gross weight permissible in Great Britain|
|MIL||Malfunction indicator lamp|
|minibus||A motor vehicle constructed or adapted to carry more than 8 but not more than 16 seated passengers (see also 'bus')|
|ministry plate||Displays the maximum authorised weights at which a vehicle may be operated. This information supersedes the maximum weights displayed on the manufacturer's plate.|
|MOT Testing Guide||A handbook for MOT scheme administration available online at https://www.gov.uk/topic/mot/manuals|
|MOT testing service||Internet based system for registering MOT tests, producing MOT documentation and performing certain administrative functions|
|OPTL||One-person test lane – authorised by DVSA to conduct testing where the tester can conduct a test without an assistant|
|special notice||An official notice by DVSA to inform AEs, NTs and other system users of changes and developments to the testing scheme or highlight areas of concern|
|ULW||Unladen weight – the weight of a vehicle inclusive of the body and all parts which are ordinarily used with the vehicle when working on a road. Unladen weight doesn't include the weight of water or fuel used for the propulsion of the vehicle, or of loose tools and loose equipment.|
|VT20||An MOT test certificate which includes the Welsh language version (VT20W)|
|VT30||A notice of refusal of a MOT test certificate including the Welsh language version (VT30W)|
|VTS||Vehicle Testing Station|
|V5/V5C||Vehicle registration certificate issued by the Driver and Vehicle Licensing Agency|
This manual is a detailed guide to the inspection for statutory MOT testing of the following classes:
|Class 3||Three-wheeled vehicles not exceeding 450kg ULW (excluding motorcycle combinations) – category L2 or L5|
|Class 4||Three-wheeled vehicles more than 450kg ULW – category L5 Quadricycles – category L6 or L7|
|Cars and Taxis – category M1|
|Minibuses, motor caravans, dual purpose vehicles and ambulances up to 12 passenger seats – category M1 or M2 American pickups up to 6500kg DGW|
|Goods vehicles not exceeding 3,000kg DGW – category N1|
|Class 5||Private passenger vehicles, ambulances and motor caravans with 13 or more passenger seats – category M2 or M3|
|Class 7||Goods vehicles between 3,001kg and 3,500kg DGW inclusive – category N1 Please note: If a goods vehicle is presented with a manufacturer's plate and a 'ministry plate' the weights to be used are those on the 'ministry plate'|
Some Class 7 testing stations are approved to test Class 5 vehicles with a DGW up to 5,000kg referred to as Class 5L (category M2). Class 5L doesn't include any vehicle that must have a seatbelt installation check. Such vehicles must be presented at a Class 5A testing station.
Definitions of sub-Classes 4A and 5A are given in the MOT Testing Guide.
Dual purpose vehicles are defined in the MOT Testing Guide. The unladen weight of a dual-purpose vehicle mustn't exceed 2,040kg. However, 4x4 pickup vehicles with a DGW over 3,000kg up to and including 3,500kg are considered dual purpose vehicles for test purposes if information about the unladen weight isn't available.
American pickup means a motor vehicle manufactured in the United States of America or Canada that meets all of the following criteria:
- it's capable of carrying a driver and at least one passenger
- it's capable of carrying goods in an open load bed separate from the driver/passenger compartment, with or without a removable cover
- it has a gross design weight over 3,000kg but doesn't exceed 6,500kg
Pickup vehicles with a fifth-wheel shouldn't be considered articulated vehicles. They should be tested as normal.
To determine the seating capacity of a passenger vehicle, the number of occupied wheelchairs that can be carried should be added to the number of seats.
Other than for the inspection of tyres, any 2 wheels of a vehicle shall be regarded as one wheel if the distance between the centres of the areas of contact between such wheels and the road surface is less than 460mm. You should be aware that this may affect the test class. For example, a three-wheeled vehicle with a wheel layout meeting this criterion must be tested as a motorcycle.
Tricycle and quadricycle test classes
|Vehicle type||Description||Test class|
|three-wheeled moped (L2)||Three-wheeled vehicle with a max speed of 45km/h, not over 50cc for a petrol engine or 4KW for any other engine or electric motor, not more than 450kg ULW||3|
|motor tricycle (L5)||Three-wheeled vehicle with wheels symmetrically arranged, a max speed over 45km/h, or engine size over 50cc, not more than 450kg ULW||3|
|motor tricycle (L5)||Three-wheeled vehicle with wheels symmetrically arranged with a max speed over 45km/h, or engine size over 50cc, more than 450kg ULW||4|
|light quadricycle (L6)||Four-wheeled vehicle with a max ULW of 350kg, max speed of 45km/h and not over 50cc for a petrol engine or 4KW for any other engine or electric motor||4|
|quadricycle (L7)||Four-wheeled vehicle with a max ULW of 400kg (550kg for a goods vehicle) with a max net power of 15KW||4|
If any of the above vehicles are electrically powered, their unladen weight mustn't include the weight of the batteries.
If there is significant doubt about the power output or the weight of the vehicle, the presenter must provide documentary evidence.
Some vehicles of historical interest may be exempt from statutory MOT testing. Such vehicles must be over 40 years old and not substantially changed.
Owners of these vehicles may still request a statutory test be conducted. In these circumstances, you must register the test on the MOT testing service and carry it out in the usual way and issue the appropriate documentation.
You should remember that certain components on historic vehicles may have been manufactured to have a greater degree of play or tolerance than is found in modern vehicles.
If you, or your assistant, aren't familiar with the controls of a historic vehicle, you should ask the vehicle presenter to operate or demonstrate the controls.
Legislation permits testers to refuse to test vehicles in certain circumstances. If any of the reasons for refusal (see below) apply, you shouldn't carry out the test and must return any fee paid for the test. You should carry out appropriate pre-checks before starting the test, to ensure the suitability and general condition of the vehicle.
If the vehicle presenter needs written confirmation of why the test can't be carried out, you should register the test using the MOT testing service and issue a VT30 clearly showing the reason(s) why the test couldn't be carried out.
If reason to refuse 'i' applies, you should issue a hand written CT30 containing as many of the vehicle details as possible. A copy of the CT30 should be retained by the VTS.
The reasons for refusing to carry out the test are:
- The V5C or other evidence of the date of first use isn't produced. Normally this evidence is only necessary if the vehicle has a 'cherished' registration mark (also referred to as personalised registration number) or if the registration mark's year letter doesn't make it clear which standard should be applied.
- The vehicle or any part or equipment on the vehicle is so dirty that examination is unreasonably difficult.
- The vehicle isn't fit to be driven when necessary to complete the test because of a lack of fuel, or oil, or for any other reason.
- The tester considers a load or other items, or insecurity of a load or other items, would prevent a proper test being carried out – unless the load is secured or removed.
- The VTS asks for the fee to be paid in advance and this isn't done.
- The vehicle emits substantial quantities of avoidable smoke.
- A proper examination can't be carried out because any door, tailgate, boot, engine cover, fuel cap or other device designed to be easily opened can't be easily opened.
- The condition of the vehicle is such that, in the opinion of the tester, a proper examination would involve a danger of injury to any person or damage to the vehicle or other property.
- The vehicle has neither a registration mark nor VIN/chassis number or frame number by which it can be identified, or that all such identifications are illegible or use letters and numbers not normally used in the English language.
If despite due care initially, it becomes apparent during a test that the test can't be completed for any of the above reasons, the test must be abandoned, or the vehicle failed because the test couldn't be satisfactorily completed. Any subsequent re-examination and fee must be in line with normal policy. See the 'MOT fees and appeals' poster (VT9A) for further information.
In addition to the above reasons you must decline to test any vehicle that isn't of a class you are authorised to test or it's of such a size, weight or configuration that it can't be properly or safely tested on the approved facilities. There are, however, exceptions for narrow track vehicles.
If a vehicle has a track width that is too narrow for the vehicle to be safely tested on the approved pit or hoist, the inspection can be carried out on an area of hard standing within the testing facility. However, this only applies where the headlamp aim test can be conducted using the approved equipment and with the vehicle placed in the headlamp aim standing area.
You should use appropriate test methods covering all testable items set out in the inspection manual. For checks where wheels must be raised clear of the ground, you should use a suitable jack. Turning plate checks will need to be carried out on hard standing as best as possible.
If a roller/plate brake test can't be carried out, due to the narrow track width or the transmission type, then a decelerometer test must be conducted.
If you have health and safety concerns regarding these procedures or the suitability of the test equipment, you should decline to test the vehicle.
Usually you'll be given the vehicle details as part of the registration process. This will usually include the vehicle's 'first used' date. If the 'first used' date is known, you should only use defects applicable to the vehicle's age.
When the 'first used' date isn't known or incorrect, you should determine the vehicle's 'first used' date as follows:
- Its date of manufacture, if the vehicle was originally used without being registered in Great Britain, such as an imported vehicle or ex-HM Forces vehicle.
- Vehicles having a Q plate registration when presented for MOT are to be treated as follows:
- for emission purposes only, they are to be considered as first used before 1 August 1975
- for all other testing purposes they are to be considered as being first used on 1 January 1971
You should enter this information onto the MOT testing service so that you can select the appropriate defects.
Although this manual is publicly available, it's specifically written for MOT testers. It specifies the applications, procedures and standards to be used for MOT testing. You must read it with any current special notices relevant to the class or type of vehicle under test.
You should familiarise yourself with the contents of the manual and any amendments to it, including special notices which affect test procedures or standards.
Defects found during the MOT test will be categorised in one of the following groups:
- minor – defects that have no significant effect on the safety of the vehicle or impact on the environment and other minor non-compliances
- major – defects that may prejudice the safety of the vehicle, have an impact on the environment, put other road users at risk or other more significant non-compliances
- dangerous – defects that are a direct and immediate risk to road safety or having an impact on the environment
If a vehicle has only minor defects, it will pass its MOT inspection and a test certificate will be issued. If a vehicle has any major or dangerous defects, it must be failed and a refusal notice issued.
The MOT testing service may give testers technical information about certain vehicles under test. This is to help testers choose the correct the test methods and/or apply the correct standards.
The MOT Testing Guide explains what is required of persons and organisations authorised to conduct statutory tests on certain motor vehicles. It also includes, among other things, information on the administration of the MOT scheme, disciplinary procedures and equipment calibration requirements.
It isn't practical to lay down limits of wear and tolerance for all types of components on different models of vehicle, or to define acceptable amounts of damage, deterioration and effectiveness.
You are therefore expected to use your knowledge, experience and judgement to assess if the condition of a component has reached the stage where it's obviously adversely affecting its functionality or likely to adversely affect the roadworthiness of the vehicle.
The term 'insecure' is used throughout this manual to describe a defective condition. This term should be taken to mean one of the following:
- a component has relative movement (looseness) at its fixings where there should be none
- a component has relative movement (looseness) to an associated component where there should be none
- a safety critical component isn't safely or completely attached at its fixing or to an associated component
Certain components, such as wheel fixings, batteries, body mountings have specific criteria detailed in the manual.
Modifications to vehicles must be assessed on their merits, taking account of the nature of the modification and whether the component is critical to safety.
A modification is unsafe if it:
- adversely affects the roadworthiness of the vehicle
- is likely to cause injury, such as modification to the body
- has a disproportionately adverse effect on the environment
If a vehicle has been extensively modified or converted, certain defects, such as for components 'missing where fitted as standard' shouldn't be applied, for example:
- a car converted for competition rally use must have the rear seats removed, be fitted with a roll cage and full harness seat belts, may not be fitted with components such as brake servo, power steering or airbags
- a car converted to a stretch limousine may no longer be fitted with items such as curtain airbags or a functional electronic stability control system
This exemption doesn't apply to vehicles with minor modifications. Therefore, a car fitted with rally style seats, body kit and a sports steering wheel wouldn't be exempt from the requirement to have a driver's airbag if one was fitted as standard equipment.
Vehicles modified for disabled use must be assessed on their merits. For example, it's acceptable for the driver's airbag to be removed for a wheelchair user, but the SRS warning lamp mustn't indicate a system malfunction.
You are advised to carry out pre-checks to ensure the general condition and suitability of the vehicle for test. Other than when using a CT code, a test mustn't commence until you have registered the vehicle for test in the MOT testing service (see MOT Testing Guide).
When registering a vehicle for test, the actual details from the vehicle must be used. It isn't acceptable to use details from other sources such as the V5C, job card or previous electronic record.
The tester who registered the vehicle for test must personally carry out the test, without avoidable distraction or interruption and only the tester is empowered to make decisions about the test results. Unless the test facility is approved for one person testing, the tester must use a suitable assistant for certain parts of the inspection.
It may be convenient to conduct the emissions test at the beginning of the inspection if the engine is still warm.
Small tools, such as pinch bars, levers and the corrosion assessment tool must be used where necessary. A hand-held inspection mirror may be used to facilitate the inspection but isn't mandatory.
The MOT test must be carried out without dismantling, so it isn't always possible to inspect some testable items. Bonnets, engine covers, luggage compartments, access flaps and passenger compartment doors must be opened when it's necessary to inspect testable items. If for example a bonnet, door or access panel designed to be easily opened can't be opened, so preventing access to a testable item, you must either abandon or refuse to carry out the test.
You should take care when jacking up vehicles to avoid causing damage and refer to manufacturers' information if available. Particular care is needed when jacking vehicles fitted with pneumatic, hydraulic or self-levelling suspension.
Once the inspection is completed, you must record the test results using the MOT testing service (see MOT Testing Guide).
If testing under CT, you must calculate the brake efficiencies and retain the readings for later data entry. You should record all results on the VT29 and retain any printout. Refer to the MOT Testing Guide for a full explanation of CT procedures.
Recommended inspection routine
Diagrams 1 and 2 (see below) show a typical inspection routine. These routines may need to be varied to suit different test bay layouts and equipment types. It's recommended that you don't carry out the brake performance test until after the rest of the inspection to prevent an unknown defect causing injury to a person, damage to the vehicle or other property.
Diagram 1. Topside inspection routine
Diagram 2. Underside inspection routine
- With the wheels in the straight ahead position and supporting the vehicle weight, inspect the vehicle underside following the routine shown. If using a lift for the underside inspection, it's recommended that the rear wheels are chocked whilst the lift is raised.
- Jack up the front and rear wheels to check relevant items. For vehicles with a DGW exceeding 5,000kg only jack the front wheels.
- Carry out the headlamp aim check and brake performance test at a convenient point in the routine depending on the layout of the equipment.
The statutory test doesn't specifically include a road test of the vehicle. However, one is permitted if you think it's necessary to check the results of an inspection. You must be properly licensed to drive the vehicle and ensure the vehicle is in a safe condition to conduct the road test.
If a disabled driver's controls or fitments are additional to the standard driver's controls and they don't adversely affect the standard vehicle equipment, they aren't testable items. However, if any such equipment is seen to be defective it should be reported to the vehicle presenter.
Disabled driver's controls or fitments that replace or affect the standard controls should be tested in the normal way and any defects should be recorded in the normal way.
AEs and their staff are reminded of their obligation to adhere to all relevant health and safety legislation while MOT testing. Further advice can be obtained from your local health and safety enforcement officer or local authority environmental health officers as appropriate.
You should take care when testing electric and hybrid vehicles as:
- there may be high voltage present at any one of several points around the vehicle, including storage capacitors and batteries
- on hybrid vehicles, the engine may start without warning when electrical equipment is operated or if the battery voltage drops
Defects covered in this manual are selected from a component-based menu system in the MOT testing service. You will first select the appropriate component from the main component list and then make further selections from the sub-menu(s). Once you've selected the appropriate component, a list of defects will be available for selection.
Various categories of defect may be available for the same item depending on the nature or severity of the defect – minor, major or dangerous. You must select the appropriate category, guided by the defect wording and using your knowledge, experience and judgement.
When an item isn't sufficiently deteriorated to justify rejection, there may be an option to select 'advisory' to inform the presenter of this fact.
When only minor defects have been selected, a test certificate will still be issued. Unlike advisory items, the use of minor defects, where appropriate, is mandatory.
If you think that a defect on a non-testable item is dangerous, you should explain it to the vehicle presenter.
Some defects listed in the inspection manual may not be accessible if they aren't relevant due to the age or test class of the vehicle. However, advisory items (if appropriate) for these defects may still be selectable.
Information on retest fees and procedures can be found in the current MOT Testing Guide and on the 'MOT fees and appeals' poster (VT9A).
When carrying out a partial retest you must examine:
- all the previously failed item(s)
- any item(s) that may have been affected by the repairs
- any minor defect or item advised on at the time of the initial test
If during a retest it's clear that the vehicle has any major or dangerous defects, you must issue a new VT30.
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