As a data point, I bought a "genuine Bosch" CPS off of EBay. Worked for 3 days then failed in the middle of traffic(always fun!) Now I have crank, fuel pump tests good but does not kick in, no tach movement, no start. Have another CPS on the way.
silber
EDIT: Looked closer and the Tach needle IS moving during cranking, so my problem is not the CPS being bad