Engine Control Unit 893906266D 7A Quattroholics Sale! from 12500 /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. 1991 Coupe Quattro 1991 90 Quattro 7A only This is the 4 pin 7A 20V Engine Control Unit Audi Part # 893906266D SKU:893906266D Tweet