cuyatie

Hello- I have a 2008 Audi A3 which I recently had chipped. (best decision ever) The car has 65k on the motor and I'm trying to be proactive and replace some parts (fuel filters, O2 sensors, PCV valve) I am very confused as to which PCV or Pressure Regulator Valve I need to order. Can anyone help with a model number or link?

Also, does anyone know if I should go ahead and replace the O2 sensors or wait?

Thanks

everfresh

Good question, I'm interested in doing that as well. Does anyone know if the best time to do that would be during a timing belt and water pump change?