OE: 234-4011, 234-4098. 1 upstream and 1 downstream O2 sensor for 1999-2000 Honda Civic L4 1.6L, 1997-2001 Honda CR-V L4 2.0L. The part of heating head of plugs are well designed to replace for your needing, no extra work required to reset or adjust when you use it, plug and play The part of wire is 4, this design to provide the double protection, and the wire is very firm. How to Choose: Please check the description or use the year/make/model drop down bar and interchangeable part numbers to confirm the compatibility. How to Install: Step1. Locate the oxygen sensor position and remove it with socket, step2. Compare the new sensor to the old sensor to ensure a proper installation, step3. Please clean the threaded port to en sure a proper seal of the new sensor,step4.Gently tighten the sensor in order to keep wire free from damage and avoid sensor leakage, step 5,reinstail the connecor,try to clear it if the car has diagnostic trouble codes Model 234-4011 234-4098 Brand Name Yeoflagtrade Item Weight 0.24 Kilograms Output Type Physical Manufacturer Yeoflagtrade Mounting Type Flange Mount Included Components Oxygen Sensor Maximum Supply Voltage 12 Volts