Rear Differential Pinion Seal 857525275 NOS Quattroholics Sale! from 9900 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. 1988-95 90 Quattro 1996-04 A4, S4, A6, S6, Allroad Fits a few other models. New Old Stock Item Audi Part # 857525275 SKU:857525275 Tweet