Material: Stainless steel Size: outer thread M18*1.5 Inner thread M18*1.5 length 46.5mm Function: Check the engine light repair Specification: quality assurance tested, more responsive, less expensive, easier to install. Direct replacement, durable and have high strength to use. Prevent certain oil and excess fuel from entering the pipe. Eliminate to checking engine light(CEL) after modifing exhaustor or removing catalytic converter. Solve the problem of P0420/P0042 codes faulty. Easy installation, direct bolt-on, no modification needed. Package Included: 1 x O2 Sensor Spacer 1.Remove O2 sensor from the pipe. 2.Bolt in new sensor spacer. 3.Bolt O2 sensor to new spacer by hand firstly. 4.Tighten with a wrench. 5.Do the same on the other side. Symptom of P0420/P0042 Codes Faulty: Uses an OBD-II scanner to retrieve trouble codes stored by the Powertrain Control Module (PCM).Faulty catalytic converter is the most common reason to cause fault codes P0420/P0042. There are 4 common indicators of faulty. 1. Check Engine Light is on. 2. Lack of power after vehicle warms up. 3. Speed of vehicle may not exceed 30-40 mph. 4. Rotten egg smell coming from the exhaust pipe. Install our oxygen sensor adapter could help solve the problem. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.