[Andy]

So which upgrade lamp/bulb did you order?

The 382 (P21W) has only one contact pin, whereas the 380 (P21/5W) has two.

 

[Andy]

I ordered 380, as per the Autbeam website. The ones in the car are also twin contact 380’s.

The MK3 though has separate led rear side lights, so ’m trying to find out, apart from brake light, what the original 380 does?

I would say Gareth's guess above about common parts for LED/Non-LED tail lights is close to the truth.

I know we had problems with the early LED'S on the Mk2 due to the wiring polarity, but I can't recall seeing this issue previously.

I had a quick look at the Autobeam and Osram websites and both list the P21/5W as being the correct fitment.

Strange...