A5 voltage Stabiliser

[Malb]

Can anyone help with the correct OEM part number for a 2016 A5 B8 1.8 petrol s-line cabriolet special edition + tfsi 

the part fitted at present is 8K 0959633B. I am told that it should be 0959633F. The module is causing severe battery drain and needs replacing. 

[Steve Q]

Usually the last letter is an upgraded and most up to date part. I'd definitely recommend speaking to Audi regarding compatibility