LED headlight upgrades. MOT Rules?

[Rick-sta]

This particular update in the MOT test criteria which you've all been referring to in this thread is on the section regarding DIPPED BEAMS and MAIN BEAMS only.

The section in reference is: 4.1. Headlamps

Sub sections:
4.1.1. Presence, condition and operation
4.1.2. Headlamp alignment
4.1.3. Switching
4.1.4. Compliance with requirements
4.1.5. Levelling devices
4.1.6. Headlamp cleaning devices

If you read these sections on the government website here you'll see these sections refer to dipped beams and main beams testing only such as beam pattern, the colour of the light emitted, headlamp washers and self levelling, and also the general condition of the headlamps:https://www.gov.uk/guidance/mot-insp...ical-equipment

The new MOT update does not affect sidelights or DRLs. Sidelights and DRLs are covered by a different section 4.2. Front and rear position lamps, daytime running lamps and end-outline marker lamps and there is no mention of LED bulbs in this section. Therefore LED sidelights, tail light bulbs and number plate bulbs is not a MOT failure under the new rules nor are DRLs. DRLs are only testable on cars first registered on 1 March 2018 so retrofitted DRLs on our cars or factory fitted DRLs on cars before 1 March 2018 are not a testable item. This change also doesn't affect LED side repeaters, reverse lights, brake lights etc.


The reason for this change is due to these new fan type LED dipped beam bulbs that have been available for the last couple of years like these https://www.ebay.co.uk/itm/Nighteye-...Cclp%3A2334524. I've personally never tested them so can't comment on how good the beam pattern or light output is, but do know of a couple who have them fitted to their halogen projector headlamps without any issues and good beam pattern output.

The problem is with these LED bulbs (and the same problem with HID kits) is they are designed to be used with projector headlamps only, but you get idiots fitting them to halogen reflectors which causes a tonne of glare and blinds the hell out of oncoming cars. HID kits and LED bulbs fitted to halogen reflector headlamps don't give the correct beam pattern either.

Can't comment on LED bulbs as I've not tested them, but HID kits fitted to halogen projector headlamps were perfectly fine in terms of beam pattern and DID NOT blind oncoming cars. I done a post on here a few years ago with photos comparing the light output from a factory 75/zt xenon projector with a D2S burner and a factory 75/zt halogen projector lamp with a H7 HID kit and the beam pattern results was identical. Hence why they passed MOTs fine and still pass MOT's if the HID kit goes unnoticed by the MOT tester as they meet beam pattern and light output requirements (only when fitted to projector lenses).

But rather than applying any logic, they introduced a blanket ban on HID kits a few years ago and this has now extended to LED dipped beam bulbs, rather than failing those who installed them to the wrong type of headlamp (i.e. halogen reflectors).


Now how does this work in practice, well the MOT tester is not allowed to remove any covers, caps etc to inspect what type of bulbs you are running in your dipped beams and main beams. Therefore, you will only fail if the MOT tester can clearly see you've fitted LED bulbs (same goes for HID kits). Which actually makes this change in the MOT test handbook rather pointless for those with LED Bulbs fitted to their halogen projector dipped beams because unless the bulb access cover has been left off and you can physically see what bulb has been fitted via the back of the headlight you can't physically see them. Unlike HID kits, the LED bulbs don't have ballasts and wiring hanging out the back of the headlamps.

The only time a car could fail under this new update is if you've installed these LED bulbs to the reflector main beams on halogen projector or xenon projector headlamps on our 75's and ZT's for example as you can physically see the bulb through the headlight, or other vehicle reflector style headlamps where you can physically see the bulb in the reflector. Vehicles with these LED bulbs fitted to dipped beams on halogen reflector style headlamps I believe would fail under section 4.1.2. Headlamp alignment anyway as I don't believe they'll achieve a satisfactory beam pattern as they're not designed for halogen reflector lamps.

so to summarise:

- LED bulb in halogen dipped beam or main beam housing = fail IF it can be physically seen by the MOT tester.
- HID kit fitted to a halogen dipped beam or main beam housing = fail IF it can be physically seen by the MOT tester (this has been the case since 2016)
- LED sidelights = fine
- LED DRLS = fine
- LED side repeaters, reverse lights, tail lights, brake lights etc = fine.


This change shouldn't really affect many on here as I don't think many members on here have fitted these fan style LED dipped beam or main beam bulbs.

To be honest I don't think this will cause much change, as HID kits fitted to halogen headlamps has been a MOT failure since 2016 but as I do custom headlights I get chatting to a wide range of car owners on facebook/instagram etc and there are still 100's of cars fitted with HID kits that still pass an MOT every year as they go unnoticed. Many owners I've chatted to about this weren't even aware that HID kits had been a MOT failure for about 3 and a half years now.