O2 Sensors is it Upstream or Downstream OEM/OE Supplier parts are often the same you'd get at the dealership, just in the different box. Before you place your order, please. Bosch Downstream Oxygen Sensor Rear 16417. No Sensor Type Heated Thread Diameter 18 Unit(s) per Car Qty (ORLY) 1 Universal Or Specific Fit Specific Wire Quantity 4 Wrench Size 22.