You have found a car with the wheels, the exhaust and the remap already done, and now you are wondering whether the UK will let it in. It will. There is no rule against importing a modified car, and most changes cause no trouble at all.
What matters is the test the car has to pass before it can be registered. A short list of modifications fails that test regularly, and they are nearly always the same ones. Know them before you buy, and a modified import is no harder than a standard one.
The test decides what matters
Every import has to show it is fit for British roads before the DVLA will register it. Which test it takes depends on its age and where it was built:
- Under 10 years old from outside Europe: usually IVA
- 10 to 40 years old: an MOT
- Over 40 years old: no MOT, as long as it has not been substantially changed
That last condition is worth noticing. A heavily modified car over 40 may lose the exemption and need testing like a younger one. Our guide to the IVA test explains the newer-car route in full.
The tester is not marking you down for being modified. They check the car against the same standards as any other: lights, emissions, noise, brakes, steering, tyres and structure. A modification only becomes a problem when it takes the car outside those standards.
What commonly causes problems
These are the changes that come up again and again. The MOT figures below come from the official MOT inspection manual, and IVA looks at the same areas in more depth.
Headlight conversions
On cars first used from 1 April 1986, halogen headlamps must not be converted to HID or LED bulbs. A converted unit is a major fault, listed as light source and lamp not compatible. A complete headlamp built for HID or LED from the start is a different matter, provided it meets the other rules.
Colour counts too. Headlamps must shine white, white with a blue tinge, or yellow. Tinted lenses or coloured bulbs that push the light outside that are also a major fault.
Exhausts and emissions
The manual says exhaust noise must not be unreasonably above what you would expect from the same car with a standard silencer. A loud aftermarket system is judged on that basis, and an excessive one fails.
Removed emission parts are a bigger issue. On cars first used from 1 September 2002, missing or obviously modified emission control equipment fitted by the manufacturer is a major fault. That includes a deleted catalytic converter. On a diesel, evidence that the particulate filter has been tampered with also fails.
Remaps and big turbos show up here as well, because the car still has to meet its emission limits. If a car struggles, we can help it through the testing it needs, or arrange the third-party paperwork where that applies.
The rest of the list
Tyres must be of the right specification, and suspension and steering must not be worn. Very low ride heights, aftermarket seats and harnesses all need thinking about before the car ships, not after it lands.
| Feature | Why it matters | What we suggest |
|---|---|---|
| HID or LED bulbs in halogen lamps | Major MOT fault on cars from April 1986 | Refit the halogen bulbs, or fit lamps designed for HID or LED |
| Coloured headlamps | Must be white or yellow | Return to standard lenses and bulbs |
| Loud exhaust | Judged against a standard silencer | Keep the original system, or ship it with the car |
| Catalytic converter removed | Major fault on cars from September 2002 | Refit one before testing |
| Diesel particulate filter tampered with | Major fault | Refit or restore it |
Send the original parts. If the seller still has the standard exhaust, headlamps or catalytic converter, ask for them. Putting a car back to standard for its test is far cheaper with the original parts in the boot than hunting for them later.
Please agree any loose parts with us before they go in the car. Some can travel with it, but they need to be declared.
Structural changes and the DVLA
Bolt-on parts are one thing. Changes to the chassis, monocoque or frame are another. GOV.UK says you must tell the DVLA about a structural modification that changes the car's dimensions or appearance.
Its examples include removing the roof, removing an integrated roll cage and changing the frame so the car looks like a different type. Converting a car to electric power also counts, even if it looks the same.
For an import, that means form V627/3 goes in with the registration, along with photos of the original VIN and the changes. If the DVLA has doubts about the car's age or identity, it can issue a registration starting with Q rather than an age-related one. Ordinary repairs and restorations do not need reporting.
The tax on a modified car
Import tax works the same as for any car. From outside the EU it is 10% duty and 20% VAT; from the EU it is 20% VAT. Both are worked out on the price paid plus the cost of getting the car here.
The 5% rate for older cars is where modifications can bite. HMRC's reduced rate is for vehicles of historical interest in their original state, so a heavily modified car over 30 may not qualify. If that rate is part of your sums, ask us before you buy. The import tax calculator shows both cases side by side.
Insurance: declare everything
Insurers want to know about every change, including the ones made for UK roads. Leaving a modification out can give an insurer grounds to refuse a claim later, and with an import it is easy to forget work done before you owned the car.
Keep the receipts and a list of every part. Get a quote before you commit, too: some modified imports are much dearer to insure than you might expect. Our guide to insuring an imported car covers each stage, and insuring a Japanese import covers the questions insurers ask.
Buying a modified car abroad
Good modifications, done with quality parts and recorded properly, can add to a car. Cheap ones usually shorten its life. Ask for receipts, the names of the workshops and any dyno or set-up sheets.
Japanese auctions often grade heavily modified cars lower, so read the notes rather than the number alone. Our guide to Japanese auction grades explains the codes.
Before you buy a modified import
0 of 7 done
From arrival to UK plates
-
Before booking
Tell us what is modified
We look at the list and flag anything likely to fail before the car ships.
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Arrival
Customs and NOVA
We clear the car, work out the tax and tell HMRC it has arrived.
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Workshop
Back to standard where needed
UK lighting changes, plus anything the test will not accept, done in our own workshop.
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Test
IVA or MOT on site
The car is tested on our site, so a retest does not mean moving it.
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Registration
DVLA
Including form V627/3 if the car has been structurally modified.
Our guide to speedometer and headlight conversions covers the changes every import may need, modified or not.
Questions people ask
Can I import a modified car to the UK?
Yes. There is no ban on modified cars. The car has to pass its IVA or MOT like any other import, so anything that takes it outside the standards has to be put right first.
Will HID or LED headlights fail?
HID or LED bulbs fitted into halogen headlamps are a major MOT fault on cars first used from 1 April 1986. Headlamps designed for HID or LED from the start are judged on the normal rules.
Will a decat or a loud exhaust fail?
Often. Missing manufacturer emission equipment is a major fault on cars first used from 1 September 2002, and exhaust noise must not be unreasonably above a standard silencer.
Do I need to tell the DVLA about modifications?
For structural changes, yes. Changes to the chassis, monocoque or frame, removing the roof or converting to electric power go on form V627/3. Bolt-on parts and repairs do not.
Does a modified classic still get the 5% rate?
Not necessarily. HMRC applies the reduced rate to vehicles of historical interest in their original state, so a heavily modified car may pay the normal rates. Ask us before you buy.
Thinking about a modified import? Send us the list of changes with your quote request and we will tell you what the test is likely to make of it.
