Important new MOT rules introduced for some LED headlight bulbs
Consumer Editor
UK motorists can now replace some traditional halogen headlight bulbs with approved LED alternatives without automatically failing their MOT, following changes made by the Driver and Vehicle Standards Agency (DVSA).
From 14 October 2026, MOT testers in England, Scotland and Wales can now accept certain ECE-approved LED replacement bulbs when they are fitted to compatible halogen headlamp units.
‘ECE-approved' means the LED bulb has been officially type-approved to meet European vehicle lighting standards, rather than simply being an aftermarket LED bulb designed to fit a halogen socket.
However, the change does not mean any aftermarket LED bulb can be fitted and pass an MOT. Currently, only two types of bulbs used in certain cars have been approved for LED retrofit replacements. These are H11 bulbs (found most commonly in front fog lights) and C5W bulbs (typically used as number plate lights on many cars).
The rules also exclude full LED headlamp unit replacements, High Intensity Discharge (HID) conversions of halogen headlamps, and the use of LED bulbs on motorcycles.
Approved products must have a secure approval sticker permanently attached to the vehicle so it can be checked during the MOT. Testers will also still be expected to check the light output and beam pattern meet existing MOT standards.
The RAC is warning drivers to avoid easy to find and cheap to buy unapproved LED bulbs. This is because they can lead to excessive headlight glare, and in some cases are unsafe.
If a halogen bulb fails, it can be tempting to search online for a cheap LED replacement that can be fitted at home. The RAC is aware that online marketplaces are awash with unregulated LED bulbs that don't meet the necessary approval standards and are not legal for use on public roads. Fitting an unapproved LED bulb carries various safety risks as they can produce incorrect beam patterns, leading to excessive glare for other road users. The risk is even greater if a bulb is installed incorrectly. Our message to drivers is clear: just because an LED replacement bulb is available online doesn't mean it's legal or safe to fit to your vehicle. Before making any change, check that an approved bulb is available for your specific headlamp from a reputable supplier. The Government has said it will increase its efforts to tackle the sale of illegal retrofit bulbs. That has never been more important as drivers can still easily find products claiming to be 'road legal' despite not meeting the required standards. Choosing the wrong bulb could lead to an MOT failure and even lead to dangerously dazzling other road users.
RAC senior policy officer
Rod Dennis
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What does the new sticker look like?
The new LED headlight sticker must be permanently attached to the vehicle somewhere that can easily be seen by a mechanic during the MOT.
The sticker must show:
- Bulb category
- Variant
- Rated voltage
- ECE approval number
- Manufacturer's name
Replacing a halogen bulb with an LED bulb
The RAC advises drivers to check the following first:
- Check your car's bulb type. It must be a halogen bulb and will carry a code beginning with H on the bulb cap
- Look for approved products. An approved bulb will come with the necessary documentation, and a sticker which will carry an ‘E mark’ and may include a hologram. Crucially, many of the most common bulb categories are not yet covered by the approval process – but will in time
- Buy from a recognised automotive lighting brand or an authorised retailer
- Be wary of online claims. Terms such as 'road legal’ or 'E-marked' or do not automatically mean a bulb is approved under the new rules
- Consider professional fitting. Correct installation and beam alignment are critical to avoid dazzling other road users. If you choose to fit the bulb yourself, or a retailer does it for you, always get the alignment checked by a reliable garage before driving
Roadside cover from £5.29 a month*
Cheaper than AA or we'll beat it by 20%^
- With over 1,700 RAC mechanics nationwide, help is never far away
- Our patrols fix 4/5 breakdowns
- Cheaper than AA Price Promise^
*At least 10% of new customers pay this for single-vehicle Roadside (basic). ^T&Cs apply.
*At least 10% of new customers pay this for single-vehicle Roadside (basic). ^T&Cs apply.
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