6 minutes ago, nta16 said:

There was a thread were a number plate light had got corroded from water getting in IIRC but I can't find it now.

 

Can you remember how the water got in? If the car in question also had a backup camera it must have had a washer spout right next to one of the lights but that area also gets its not-so-fair share of humidity from just driving.

 

The plastic cache that holds/goes over the handle switch also has the wart holding the camera. It wouldn't be beneath VAG to sell the entire assembly as a single piece. (IIRC the water pump can only be had as part of the distribution replacement kit, and my EGR valve had to be replaced entirely too rather than just the mechanical part that is the one getting caked up...)

I'm lucky to remember my name most days, I think the light was on an earlier model, I'm not sure Fabias have such things as cameras, not earlier years anyway.

 

I'm not able to check parts numbers so this is just as an example - Outdoor Handle for the 5th Door Škoda - boot unlocking switch for cars with central locking, for combi and sedan cars - https://www.skoda-parts.com/spare-part/6y0827574m-outdoor-handle-for-the-5th-door-skoda-6096.html

 

Replacing the switch might get the boot light working too, but I don't know.

 

Only as example - I don't think you need this -Servomotor for the 5th Door Lock Škoda - Boot lid lock with a motor for opening the boot, bottom part, for cars with central locking -  https://www.skoda-parts.com/spare-part/6y0827511g-servomotor-for-the-5th-door-lock-skoda-5786.html