H4 To H7 Upgrade
- Thread starter Howler
- Start date
I've only found the Lumro and Maruta.
Given up on the Lumro, replaced so many of them and it takes me half an hour to get the holder back in! Every time!
Pretty sure you won’t find any e-marked W21W LEDs as I believe the spec is for a halogen bulb. You may find e-marked ‘whiter’ halogen ones that have a blue coating but they are still miles off the colour temp of LED.
Sorry, are you referring to the DRL bulb as LED’s are fine for DRL bulbs.
There is an earlier thread referring to the MOT requirements.
Interesting. Thanks. I thought all bulbs in headlights had to be e marked. To be honest, the other thing that puts me off is the error light coming on. I’m yet to be convinced that a genuinely error free LED bulb exists… almost every thread I read there’s a few who have no issues but others that do, and one of my main reasons for changing from aftermarket headlights to H7 is to no longer have to look at a bulb out warning light!
I went for the bulbs linked below (as recommended previously on here) for my H7 DRLs. They work well and do not give a bulb warning (I’ve had them for about 6 months and used regularly). I did have one warning once, due to a low starter battery, which reset when I restarted a couple of minutes later. No idea if the LEDs contributed to this as it could have been any bulb causing the warning due to the low voltage.
Twenty20 DRL LEDs
My understanding is LEDs are OK in DRLs as they are not the ‘headlamp’. The issue of LEDs or HIDs in halogen headlights been a mandatory fail is specifically mentioned in the ‘headlight’ section, not the DRL section. They do need to work as advertised and be the right colour etc though. I’ve linked the MOT doc below but I’ve not read in great detail, just a scan read, so happy to be corrected.
MOT requirements
As the H7 DRL bulb is hidden behind a frosted lens it would have to be removed by someone to check. Highly unlikely to be a problem!
Yes - If you want genuine H7 units as VW made them then you will need halogen bulbs for the DRLs and potentially change them more often due to the shorter life than LEDs. It really is a case of pay your money make your choice... I like my LEDs and haven't had any probs with them, but totally understand that that is not what those units were "built with"
If you check back through the thread a number of people have good experience with the Twenty20 LED bulbs. No Canbus errors.
(I found them a bit of a PITA to get in even with the headlamp out on the bench)
Also there is a known fault with the H7 DRL holder which can be fixed with a new bulb holder which has wires attached. Also referenced earlier in the thread.
If your having a lot of trouble with H7 DRL bulbs then the holder is the problem
Hi , have just switched over H4 TO H7, did it checked with ignition all lights were working, installed DLR LEDs, put bumper back on.
Then went for a drive and the warning light popped on, DRL bulbs were slightly different to the recommended as they had no stock.
However I then noticed I didn't seem to have any DRLs at all, both sides.
I've managed to switch them back to the originals , warning light still on and no DRLs.
When should the DRLs come on? What switch setting. Any ideas what I could have done?
Then went for a drive and the warning light popped on, DRL bulbs were slightly different to the recommended as they had no stock.
However I then noticed I didn't seem to have any DRLs at all, both sides.
I've managed to switch them back to the originals , warning light still on and no DRLs.
When should the DRLs come on? What switch setting. Any ideas what I could have done?
T6 OEM LED-headlight retrofit
I had HazzyDayz do the LED upgrade for me last week. Amazing the difference.
Thanks!Similar threads
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