It'll be 045 129 713 M, the same as is used for the ATL (RHD). They incorporate coolant cooling for the EGR so will be different to that used on the AMF.
air filter with connecting parts<br/>intake connection<br/>air mass meter Audi A2 (A2) 2003 year Audi EUROPA 129020 spare parts
audi.7zap.com
See the final-letter variants of part number 25 - and as @RAB noted above - then cross-refer to the columns that define if they are the left hand drive or right-hand drive variants for specific engine types. For left-hand drive BHC there are two parts - one of which was only fitted for a 4 month window in 2003, then the part common to the ATL was fitted.