Thanks for all the comments on this.
I’ve been getting by fine with the wipers bypassing the BCM connected to to “temporary” switch.
Given the age and mileage (90k), part of me had been thinking of just leaving it like that…not sure if it will pass an MOT though.
However, daughter just informed me that the rear near side electric window switch isn’t working properly - it will put the window up, but not down…very weird. Come to think of it, the aircon will also occasionally blow hot when set to cold.
An uneducated opinion, but it feels like the BCM is going through a slow painful death and it’s only a matter of time before it fails completely.
if I were to replace the BCM, is it possible to buy a second hand one from eBay and get someone with the right kit to program it? Will my keys still be linked etc?
rhe nearest VAG dealer is 120 miles away and I’ve read a genuine repair/replacement could be £1,000 which I can’t really afford.