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Exterior guides and mods

Roadster Rear Light Water Ingress

Modification Details




As the Roadster gets on in age, more people are noticing water collecting inside the rear light.



The water usually gets in through cracks either side of the reflector. More so the middle join.



People have incorrectly attributed this to heat from the 21 watt reverse bulb.
This of course is bollocks unless you drive everywhere in reverse and leave your reverse light blazing for hours.

It's just badly designed. The UV damage, temperature cycles from the sun and a small glue surface makes it weak.

Firstly Let The Water Out

I have seen some people (shithouses) recommend drilling a hole in the clear plastic to let the water out.
Don't do that. Just remove the light unit and drill a 3mm hole in the back at the bottom corner.



The water will now drip out and will stop collecting inside the unit.



Because it's drilled from the back, it's far less noticeable than a hole on the clear cover.



Can I Use A Smaller/Larger Drill Bit?

Due to water surface tension, anything smaller than 3mm doesn't tend to drain as well and can leave a small
amount behind. A larger size will allow the water out but will look more obvious and could allow bugs in.

Stopping The Water Ingress

The split may not be obvious but if you push from behind...



...it usually has a bit of movement. Water will get in anywhere if given the chance.


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