10-pack of air filters for all MkIV TDI models, including Jetta TDI, Golf TDI and New Beetle TDI. This is the "suffix A" air filter which has an extra layer of foam at the bottom, effectively acting as a prefilter. This extra layer takes the place of the snorkel/snowscreen which was present on the older cars.
While installing, be sure to verify that the airbox cover is properly seated and sealed. Applicable for all A4 ALH models including PDs.