MOT testers must now accept approved LED bulbs in halogen headlamps

From today, an MOT tester who fails a car for having approved LED replacement bulbs in its halogen headlamps is testing it wrong. The Driver and Vehicle Standards Agency (DVSA) published special notice 05-26 on 13 October, and it takes effect on 14 October: testers must accept ECE-approved LED replacement (LEDr) bulbs fitted in compatible halogen headlamp units.

The rule sounds broader than it is, and the detail matters more than the headline. What has changed is the paperwork test, not the beam test. A car with the right bulb and the right sticker should pass this element of the MOT today. A car with a bright white bulb and nothing to prove where it came from still fails.

What the change covers

The notice applies to class 3, 4, 5 and 7 vehicles with existing halogen headlamp units that have been fitted with approved LED replacement bulbs.

Three exclusions are worth knowing. Class 1 and class 2 motorcycles are outside the change, so a bike with an LED bulb in a halogen lamp has no new allowance. Halogen units converted to high-intensity discharge (HID) bulbs are also excluded, which keeps the older gas-discharge retrofit in the position it was already in. Full LED headlamp unit replacements are excluded too, because a complete unit is assessed as a unit rather than as a bulb in a housing.

The change applies in England, Scotland and Wales.

Why lamps are worth a whole special notice

Lighting is the single biggest source of MOT defects, which is why a small procedural change gets its own notice. DVSA's statistics for class 3 and 4 vehicles show that lamps, reflectors and electrical equipment accounted for 24.89% of all defects recorded in the 2025 to 2026 financial year, and appeared in 10.44% of initial tests. In the first quarter of the 2026 to 2027 year, 26.75% of class 3 and 4 tests ended in an initial failure.

Those numbers describe a test where a bulb can decide the outcome. They also explain why the aftermarket for LED upgrades has grown: a brighter, whiter headlamp is a visible change for a modest outlay, and the DVSA has now set out exactly how an approved conversion is recognised at test.

The sticker is the test

An approved product comes with a secure approval sticker, and the sticker has to be permanently fixed to the vehicle where a tester can see it during the test. The notice sets out what it must carry: the category, for example H11 LEDr, the variant, the rated voltage, the ECE approval number, the manufacturer's name, and a security feature such as a hologram.

Manufacturers can produce different designs, so the size, shape and colour of the sticker tell you nothing about whether it is genuine. What matters is that those six items are on it and that it is attached to the car rather than sitting in the glovebox or the box the bulb came in.

The tester's job has been deliberately limited. The notice states that testers only need to check the approval sticker is there, and that they do not need to check the ECE approval number, the approval markings or the manufacturer's details against any database, documentation or record. That is an important protection for anyone with a legitimate retrofit: the sticker is treated as the evidence, and a tester cannot fail a car because they could not verify a number online.

What still fails

Four situations produce a fail. There is no sticker. The sticker cannot be read. The sticker looks as though it has been tampered with. The sticker clearly does not match the bulb that is fitted.

Any of those, and the tester records the major defect "light source and lamp not compatible". That wording is worth remembering, because it will appear on fail certificates for cars whose lights work perfectly well.

The mismatch case is the one that catches people out. A previous owner may have fitted an approved bulb with its sticker and then replaced the bulb with a different one, leaving a sticker that describes a part no longer on the car. The sticker has to match what is in the lamp today, so a bulb swap without a fresh sticker turns a pass into a fail.

If your car already has LED bulbs

Look for the sticker before the test rather than after it. It should be fixed to the vehicle where a tester can see it, legible, and consistent with the bulb fitted. If it is missing, the car will fail on this point, and the fix is either an approved LEDr bulb supplied with its sticker or a return to the halogen bulb the unit was designed for.

That is a cheap fix compared with the inconvenience of a failed test and a second visit, and it is the sort of thing worth doing the week before the test rather than the morning of it.

If you are buying a used car

Aftermarket LED bulbs are one of the cheapest changes a seller can make, and one of the easiest to get wrong. The check takes seconds: open the bonnet, find the approval sticker, confirm the category matches the bulb in the lamp. A halogen unit carrying an H11 LEDr sticker and an H11 LEDr bulb is straightforward. A halogen unit with a very white bulb and no sticker is a fail waiting for its next owner.

There is a second question behind the first. The rule only covers bulbs fitted to compatible halogen units, so the housing has to be a halogen unit rather than an HID or full LED unit. If the seller cannot explain the lighting history, treat the lamps as a cost to resolve and price accordingly.

The beam is still tested

An approval sticker does not make a beam pattern correct. Headlamp aim remains part of the MOT, and the inspection manual's section 4.1 sets out how dipped beam aim is measured against tolerance lines, with different criteria for lamps mounted at 850mm from the ground or less and those mounted higher. A retrofit can be approved on paper and still fail on aim, because the light source may not sit where the reflector was designed to put it.

That is a separate defect from the one this notice addresses, and it is the reason the rule change is not a blanket approval of every LED conversion on the road.

The read

This is a narrow change with a real effect for a specific group of cars. It moves vehicles with approved bulbs and intact stickers from failing on paperwork to passing on it, and it tells testers exactly what to look for.

It does not make unapproved conversions acceptable at test, and it leaves HID retrofits and the aim test exactly where they were. For a driver who paid for approved bulbs and kept the sticker on the car, today removes an unfair risk. For anyone buying used, it adds a question to the checklist that costs ten seconds and can save a wasted test.