One DRL is half as bright as the other.

Technical Advice, Faults and How-To Information.
Post Reply
mickjaguar
Posts: 1261
Joined: Sun Mar 13, 2016 6:07 pm
Location: Chichester

Post by mickjaguar »

scm wrote: Mon Jun 24, 2024 3:27 pm What's special about the left hand side, I wonder? It always seems to be the left, in both RHD and LHD cars.
Yeah, it is very odd. If it was linked to say rougher road surfaces nearer the kerb then the US models wouldn't be affected. Also given the US lamps are a different part number and probably different beam pattern, it has to be a generic internal component used only for that side.

After reading about what's behind the fault, it seems that the exact alignment of the LED tube is critical. My guess is that there's a problem with the manufacturing tolerance of this left side component, which allows it to move very slightly over time and hence the led beam loses that bit bit of focus.
2019 SVR Coupe, Velocity Blue
Previous 2015 V6 340 Coupe IRR

User avatar
MajorTom
Posts: 820
Joined: Tue Apr 20, 2021 7:57 pm
Location: Luxembourg

Post by MajorTom »

Or could it be that there are some vibrations in the left hand side of the engine bay which over time triggers the misalignment of that component in the light?
MY18 V6S R-Dynamic coupé RWD with about every toy and option you could get
BRG, design black pack, 20" carbon blades, pano, full Sienna tan interior with performance seats...
Tim Atkinson
Posts: 5
Joined: Sun Dec 10, 2023 1:19 pm

Post by Tim Atkinson »

I've attempted to contact the owner of this site previously, and he has chosen not to reply, but I hope he might do so now on this topic. I'm pleased to say that I'm working on a solution to this issue with a reputable aftermarket headlight specialist, and I would very much like to share details here. However, I can only do so with the site owner's blessing. So, if any of you know the site owner, and would like to be kept briefed about progress towards a reasonably-priced solution to the DRL problem, a nudge on my behalf would be much appreciated.
simpleR
Posts: 2587
Joined: Tue Oct 31, 2017 11:56 am

Post by simpleR »

If you have information and possible fixes then please post solutions. I have flagged your post for the attention of the team.
400 Sport AWD - MY18 - Black
Tim Atkinson
Posts: 5
Joined: Sun Dec 10, 2023 1:19 pm

Post by Tim Atkinson »

Sadly we’re five days on and no contact from the forum owner. There is a Facebook group addressing this issue on which I am active. Please go there for updates, it is easy to find.
simpleR
Posts: 2587
Joined: Tue Oct 31, 2017 11:56 am

Post by simpleR »

Just a quick update on the DRL issue.

Car was booked in this morning for service and MOT so phoned a few weeks back to add on the free vehicle health check so they will look at the light for free.

Picked up car this afternoon. Extended warranty have approved the replacement of the headlight at £186 diagnostic fee, £2599 for the headlight, and some labour, so plus VAT that's around £3,500. Headlight on order, parts have confirmed it is in stock and should arrive to Derby later this week.

So if you have Jaguar extended warranty and a dim nearside DRL then it is covered. For those without Jaguar extended warranty I hope someone provides an update and fix (rather than expensive replacement).
400 Sport AWD - MY18 - Black
User avatar
MajorTom
Posts: 820
Joined: Tue Apr 20, 2021 7:57 pm
Location: Luxembourg

Post by MajorTom »

Result! Good to hear. Just to add the international perspective - whether the Jaguar extended warranty covers it depends on the market. It obviously does in the UK, apparently also in Belgium but definitely not in Germany.
MY18 V6S R-Dynamic coupé RWD with about every toy and option you could get
BRG, design black pack, 20" carbon blades, pano, full Sienna tan interior with performance seats...
User avatar
WShudds
Posts: 325
Joined: Thu Dec 14, 2023 10:43 pm

Post by WShudds »

Yeah, l might have to bite the bullet and get an extended warranty. I had a look at the manufacturing date of the headlights on mine and they were both made in 2017 but months apart. I wonder if there's a point in looking into mfg date or batch number of the ones that are failing. Could you share a photo of the sticker on yours?
MY18 Manual :o P340 R-Dynamic RWD Coupe, Caldera Red on 19˝ Centrifuge wheels. Pzero. Mods: Reverse camera, interior/puddle lights and tinted windows.
simpleR
Posts: 2587
Joined: Tue Oct 31, 2017 11:56 am

Post by simpleR »

Sure, will do. Off to London tomorrow but will do when back at weekend.

Mine was manufactured start of April 2017, registered 27th May 2017 so expect to see an early 2017 manufactured date. Rather odd it failed nearly 7 years and 48k miles later. Just glad Jaguar Derby are great and Jaguar warranty is too.

After the 4 years I've been paying for extended warranty that's a new back box (£1600), both front lower control arms (£2300) and headlight (£3500) they have covered with no issues at all. So probably paid around £4k in warranty and had £7400 of claims. Not forgetting the warranty comes with breakdown (used twice for punctures) so I know it doesn't work out for everyone but has paid for it's self nearly twice over for me (plus peace of mind).
400 Sport AWD - MY18 - Black
Post Reply

  • You may also be interested in...
    Replies
    Views
    Last post