09/01/2001
The landscape of vehicle roadworthiness in England, Scotland, and Wales underwent a significant transformation on 20 May 2018. These sweeping changes, impacting cars, vans, motorcycles, and other light passenger vehicles, were designed to modernise the MOT test and align UK standards with broader European regulations. One of the most notable shifts, and often a point of confusion for vehicle owners, was the introduction of new vehicle classifications, specifically the M1 and N1 categories, now prominently featured on your MOT certificate.
Previously, vehicles were categorised purely by 'classes' (e.g., Class 4, Class 7). While these classes still exist for the time being, the new system introduces European type-approval categories, providing a more universally recognised classification. Understanding these new categories, alongside the other changes, is crucial for every driver to ensure their vehicle remains compliant and safe on the roads.
- Understanding the New Defect Categories
- The Evolving MOT Inspection Manual
- New Look MOT Certificates and History Checks
- Stricter Diesel Vehicle Emissions Testing
- Demystifying Vehicle Classifications: M1 and N1
- Exemption for Historic Vehicles
- Why Were These Changes Made?
- Frequently Asked Questions (FAQs)
Understanding the New Defect Categories
A core element of the 2018 MOT changes was the redefinition of how defects are categorised and recorded. No longer are faults simply 'pass' or 'fail'. Instead, a more nuanced system helps drivers understand the severity of any issues found during the inspection. Testers now categorise defects into three main types: Dangerous, Major, and Minor. Additionally, 'advisories' can still be issued, and, of course, a 'Pass' means your vehicle meets the minimum legal standard.
It is imperative for testers to record all dangerous, major, and minor defects, as failure to do so can result in disciplinary action from the Driver and Vehicle Standards Agency (DVSA). The comprehensive MOT inspection manual provides precise guidance on which defect category applies based on the type and seriousness of the problem.
What Each Defect Category Means:
| Item Result | What it means about the item | How it affects the MOT result |
|---|---|---|
| Dangerous | A direct and immediate risk to road safety or has a serious impact on the environment. | Fail |
| Major | It may affect the vehicle’s safety, put other road users at risk or have an impact on the environment. | Fail |
| Minor | No significant effect on the safety of the vehicle or impact on the environment. | Pass |
| Advisory | It could become more serious in the future. | Pass |
| Pass | It meets the minimum legal standard. | Pass |
If your vehicle receives a 'Dangerous' defect, you are legally prohibited from driving it until the repair has been carried out. For 'Major' defects, immediate repair is necessary. 'Minor' defects, while not leading to a failure, should still be addressed as soon as possible to maintain your vehicle's condition. Advisories are crucial warnings that something needs monitoring and potentially repairing in the future.
The Evolving MOT Inspection Manual
Coinciding with the defect category changes, the official MOT inspection manual also underwent a comprehensive overhaul on 20 May 2018. This vital document, which serves as the bible for MOT testers, now features more sections and a restructured order to accommodate the updated testing procedures.
The revised manual details all new, changed, or removed failures, checks, and provides improved or altered information for testers. This ensures that every aspect of the MOT test is clearly defined, leaving less room for ambiguity and promoting consistent testing standards across the country. For example, specific checks related to the new diesel emissions regulations are now thoroughly outlined within this manual.
New Look MOT Certificates and History Checks
To reflect the new defect categories, the appearance of the MOT test certificate itself was redesigned. The new-style certificates clearly list any defects found under the new 'Dangerous', 'Major', or 'Minor' categories, making it much easier for drivers to understand the issues with their vehicle at a glance. This enhanced clarity aims to empower vehicle owners with better information regarding their car's condition.
Even replacement certificates for tests conducted before 20 May 2018 are now issued in this new style. Furthermore, for MOT centres in Wales, there is now the option to print certificates in either English-only or Welsh-only, moving away from the previous bilingual format, though contingency testing certificates remain English-only.
The online service for checking a vehicle's MOT history has also been updated to mirror these changes. When you check a vehicle's MOT history online, you will now see defects listed according to the new categories, providing a consistent experience with the physical certificate.
Stricter Diesel Vehicle Emissions Testing
One of the most significant changes for owners of diesel vehicles involves much stricter limits for emissions, particularly for cars equipped with a Diesel Particulate Filter (DPF). The aim of these changes is to reduce harmful emissions and ensure that diesel vehicles are running as cleanly as possible.
Testers are now required to measure emissions against the manufacturer's plate value, if present. For newer vehicles without a specific manufacturer's plate value, a new, lower default limit applies. Beyond numerical limits, there are now two clear 'major fault' criteria for diesel vehicles:
- If any smoke, regardless of colour, can be seen coming from the exhaust during the test.
- If there is any evidence whatsoever that the DPF has been tampered with, removed, or modified.
These stringent measures underscore the importance of maintaining your DPF and ensuring your diesel vehicle is not emitting excessive smoke. Tampering with emissions control systems is a serious offence and will result in an immediate MOT failure.
Demystifying Vehicle Classifications: M1 and N1
Perhaps the most direct answer to the question of 'What cars are M1 and N1?' lies in the updated vehicle classifications. As part of the alignment with European type-approval categories, a simplified system has been introduced:
- All cars are now classified as M1.
- All goods vehicles that fall within the scope of the MOT test are now classified as N1, specifically those with a Design Gross Weight (DGW) of up to 3,500kg.
While the traditional 'Class' system (e.g., Class 4, Class 7) is still used for the time being, the European type-approval categories (M1, N1, L2, L5, L6, L7, M2, M3) provide a more standardised way of categorising vehicles globally. The DGW is a critical factor in determining a vehicle's classification, representing the maximum permissible weight of the vehicle including its load.
Key Vehicle Types and Their Classifications:
| Vehicle Type | Vehicle Class | European Type-Approval Categories |
|---|---|---|
| Three-wheeled vehicles not exceeding 450kg unladen weight (ULW) (excluding motorcycle combinations) | Class 3 | L2 or L5 |
| Three-wheeled vehicles more than 450kg ULW | Class 4 | L5 |
| Quadricycles | Class 4 | L6 or L7 |
| Cars and taxis | Class 4 | M1 |
| Minibuses, motor caravans, dual-purpose vehicles and ambulances up to 12 passenger seats | Class 4 | M1 or M2 |
| American pickups up to 6,500kg DGW | Class 4 | - |
| Goods vehicles not exceeding 3,000kg DGW | Class 4 | N1 |
| Private passenger vehicles, ambulances and motor caravans with 13 or more passenger seats | Class 5 | M2 or M3 |
| Goods vehicles between 3,001kg and 3,500kg DGW inclusive | Class 7 | N1 |
It's important to note that testing goods vehicles over 3,000kg and up to 3,500kg DGW (Class 7) requires the MOT centre and its testers to be specifically authorised for Class 7 vehicles. If a goods vehicle is presented with both a manufacturer’s plate and a ‘ministry plate’, the weights on the ‘ministry plate’ should be used for classification purposes.
Specific Vehicle Considerations:
Dual-Purpose Vehicles
The definition of a dual-purpose vehicle remains consistent: a vehicle designed to carry both passengers and goods, with an unladen weight not exceeding 2,040kg. However, a specific provision has been made for 4x4 pickup vehicles with a DGW between 3,000kg and 3,500kg. If information about their unladen weight is not available, these are now considered dual-purpose vehicles for MOT testing purposes.
Large Class 4 Vehicles
A 'large class 4 vehicle' refers to any Class 4 vehicle (which could be an M1 car or an N1 goods vehicle) that has a DGW greater than 2,500kg. For these vehicles, additional checks are mandated within various sections of the MOT inspection manual, reflecting their larger size and potential for greater wear and tear.
American Pick-ups
Specific guidance exists for American pick-up vehicles manufactured in the USA or Canada. If their DGW falls between 3,000kg and 6,500kg, they are to be tested as a Class 4 passenger vehicle (M1). However, testers must ensure that such vehicles can be safely tested on the authorised equipment; if a vehicle is too large for the facility, it must not be tested. Pick-up vehicles featuring a 5th wheel should be treated as normal vehicles for testing, not articulated vehicles.
Exemption for Historic Vehicles
Another significant change introduced in May 2018 was the expansion of the MOT exemption for historic vehicles. Previously, only vehicles first built before 1960 were exempt. Now, cars, vans, motorcycles, and other light passenger vehicles are exempt from needing an MOT if they are over 40 years old and have not been substantially changed in the previous 30 years.
This exemption applies from the 40th anniversary of the vehicle's first registration. For example, a car first registered on 31 May 1978 became MOT exempt from 31 May 2018. Drivers do not need to apply for this exemption. However, each time they tax their historic vehicle (even if no fee is payable), they must declare that it meets the criteria for not needing an MOT.
It is crucial to understand that even without an MOT, historic vehicles must still be kept in a roadworthy condition. Driving a vehicle in a dangerous condition can lead to severe penalties, including fines of up to £2,500 and three penalty points on your licence.
Why Were These Changes Made?
The comprehensive overhaul of the MOT test was primarily driven by the implementation of EU Directive 2014/45, which came into effect on the same date, 20 May 2018. Despite the UK's decision to leave the European Union, the country was still a member at the time the directive came into force. Non-compliance would have exposed the UK government to ongoing substantial fines. Furthermore, without a compliant EU MOT, UK-registered vehicles might have faced restrictions on entry into other EU countries.
Frequently Asked Questions (FAQs)
What exactly is an M1 vehicle?
An M1 vehicle, under the new European type-approval categories, refers to all cars. This classification simplifies the previous system where cars primarily fell under Class 4. If your vehicle is a standard passenger car, it is now classified as M1 on your MOT certificate.
What is an N1 vehicle?
An N1 vehicle is a goods vehicle. Specifically, it applies to all goods vehicles that are within the scope of the MOT test and have a Design Gross Weight (DGW) of up to 3,500kg. This includes many vans and light commercial vehicles that previously might have been Class 4 or Class 7 depending on their DGW.
Did the MOT test change for all vehicles?
Yes, the fundamental way the MOT test works changed for cars, vans, motorcycles, and other light passenger vehicles. While the specific checks for motorcycles and 3-wheelers are detailed in the MOT inspection manual, the overarching changes in defect categories, certificate design, and vehicle classifications apply broadly across these vehicle types.
What are the new MOT defect categories?
The new defect categories are 'Dangerous', 'Major', 'Minor', 'Advisory', and 'Pass'. 'Dangerous' and 'Major' defects result in an immediate MOT failure, with 'Dangerous' requiring the vehicle not to be driven until repaired. 'Minor' defects and 'Advisories' allow the vehicle to pass, but repairs are recommended or necessary soon.
How do I know if my diesel car will pass the new emissions test?
The new diesel emissions test is stricter. Your car must meet either the manufacturer's plate value for emissions or a new lower default limit for newer vehicles. Additionally, any visible smoke of any colour from the exhaust, or evidence of DPF tampering, will result in a major fault and MOT failure. Regular servicing and ensuring your DPF is in good working order are key.
Can I still drive my car if it gets a 'dangerous' defect?
No, absolutely not. If your vehicle is found to have a 'Dangerous' defect during its MOT, it poses an immediate and direct risk to road safety. You must not drive the vehicle until the defect has been properly repaired. Driving a vehicle with a dangerous defect can lead to significant fines and penalty points.
Do historic vehicles still need an MOT?
Vehicles that are over 40 years old and have not been substantially changed in the last 30 years are now exempt from needing an MOT. This exemption automatically applies from the 40th anniversary of their first registration. However, owners must still ensure their vehicle is kept in a roadworthy condition and declare this when taxing the vehicle.
If you want to read more articles similar to Decoding M1 & N1: Your Guide to UK MOT Changes, you can visit the MOT category.