How many O2 sensors does a 98 Oldsmobile delta 88 have

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. A V6 engine will have an oxygen sensor before each catalytic converter, and one after each. As such, yours should have 4. Don't just look to replace sensors. Testing is essential to find out what's going on. Sensors are not often the cause of problems. Especially when you decide you should replace them all! Codes are clues, do not condemn specific parts. Get help from a shop near you -- https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.