The going rate for QV alternators is around $500 + a refundable core chargs. Any shop that rebuilds BOSCH alternators can rebuild it for around $100. Ask the local BMW,MERCEDES, or VW shopos who rebuilds their BOSCH alts, or just look in the yellow pages. Often when the alt is rebuilt, higher current coils are used & tests 10 A to 15 A higher than spec.