578 LED Festoon Bulb, 42mm 41mm DE3425 DE3423 211-2 LED

These were perfect, great value, very white, bright light. Easy to change, plug and play compatiblity, so much better than the regular bulbs. Easy to fit, less than a minute for 2 bulbs. 4L Q7 2013 S-Line 4.2L V8 TDI These are the bulbs for the front dome lights FYI, this seller sells the bulbs for the back map lights panels and under seat, foot well and door open red lights. All you need is a plastic pry tool. Cambus, error free, no flickering, so buy with confidence. You will need 2 to change all the dome bulbs,

Way brighter than the halogens!

Bright LED's. Used to illuminate the inside of a caravan front storage cupboard.

These festoon 578 bulbs are a great upgrade—much brighter than the stock ones and they give the interior a cleaner, more modern look. The build quality seems solid right out of the box. I haven’t had any CANBUS errors on my 2008 Freelander 2, which is always a relief with LED swaps. Longevity is still a question mark, but since it’s a multi-pack, I’ve got backups if needed. Overall, a good value and a noticeable improvement.

No issue installing and no errors. Perfect. For Volvo Xc90

These bulbs are a great replacement for my cab lights which are useless in the Peugeot Boxer. Bright and also came safely packaged

Does the job.

These 31mm DE3175 LED Festoon Bulbs, are very well made with a good electronic architecture: each of the 21 individual LEDs are fed with a constant current sourced by integrated circuits. They give a bright white light, which has transformed the cabin lighting of my Nissan X-Trail 4x4. They also take around one tenth of the current of the standard filament bulbs. This is an important feature when you use the cabin lights for long periods without the engine running, for example when camping. Highly recommended NB: There are two types of festoon bulb holders: end clip and side clip. These LED festoon bulbs will fit end clip holders without problem. But, as there is an aluminium heatsink along the back of the LED bank, there is a danger that side clips will contact the heatsink and blow a fuse. So, in the case of a side clip holder, carefully check that the contact clips, at both ends of the holder, are not touching the LED heatsink. In an extreme case, you may need to carefully file away some metal from the clips facing the LED (It would be highly advantageous if the this festoon LED manufacturer could embody insulating bushes at each end of the heatsink to prevent possible contact with side clips: the heatsinks are anodised, but that is not considered to be sufficient)