Drive belt size

[Shaun Leeming]

Hi im wondering on what size drive belt I need for my 2002 a4 (B6) 1.9 tdi (red i) as there is 2 sizes?? I have the small one for the aircon etc but the larger one for the power steering, altenatot, etc

[Steve Q]

I'd be basing it of the part number in the original belt in my opinion. 

[Magnet]

Are you replacing g both Shaun? Do you need part numbers to be able to buy aftermarket ones on-line? If so, and there is doubt then it might be worth considering buying genuine parts at discount from the likes of TPS or Audi Parts Direct at Cardiff.

Kind regards,

Gareth.