Does this mean I definitely need to replace the oil pump
What is your question?
Oil pressure dropped driving down highway then car lost power
Tested the oil pump pressure and it stays about halfway then with in a minute it drops way down to almost no pressure at all!
RepairPal Certified shops can diagnose and repair your 2005 Volkswagen Passat. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.