Application: For Most Vehicle With M18X1.5 Threads. Specification: 100% 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. We have straight and 90 degree angled oxygen sensors on sale. Package Included: 1xO2 Sensor Spacer. (100% Brand New Never Used Or Installed) Installation: 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. Steps Rated Error Codes: P0031-O2 SENSOR 1/1 HEATER CIRCUIT LOW. P0037-O2 SENSOR 1/2 HEATER CIRCUIT LOW. P0051-O2 SENSOR 2/1 HEATER CIRCUIT LOW. P0057-O2 SENSOR 2/2 HEATER CIRCUIT LOW. P0032-O2 SENSOR 1/1 HEATER CIRCUIT HIGH. P0038-O2 SENSOR 1/2 HEATER CIRCUIT HIGH. P0052-O2 SENSOR 2/1 HEATER CIRCUIT HIGH. P0058-O2 SENSOR 2/2 HEATER CIRCUIT HIGH. P0131-O2 SENSOR 1/1 CIRCUIT LOW VOLTAGE. P0137-O2 SENSOR 1/2 CIRCUIT LOW VOLTAGE. P0151-O2 SENSOR 2/1 CIRCUIT LOW VOLTAGE. P0157-O2 SENSOR 2/2 CIRCUIT LOW VOLTAGE. P0132-O2 SENSOR 1/1 CIRCUIT HIGH VOLTAGE. P0138-O2 SENSOR 1/2 CIRCUIT HIGH VOLTAGE. P0152-O2 SENSOR 2/1 CIRCUIT HIGH VOLTAGE. P0158-O2 SENSOR 2/2 CIRCUIT HIGH VOLTAGE. P0133-O2 SENSOR 1/1 SLOW RESPONSE. P0139-O2 SENSOR 1/2 SLOW RESPONSE. P0153-O2 SENSOR 2/1 SLOW RESPONSE. P0159-O2 SENSOR 2/2 SLOW RESPONSE. P0135-O2 SENSOR 1/1 HEATER PERFORMANCE. P0141-O2 SENSOR 1/2 HEATER PERFROMANCE. P0155-O2 SENSOR 2/1 HEATER PERFORMANCE. P0161-O2 SENSOR 2/2 HEATER PERFORMANCE. P0420-CATALYST 1/1 EFFICIENCY. P0430-CATALYST 2/1 EFFICIENCY. Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2.1 Inch=2.54 CM; 1 CM=0.39 Inch. Due to the manual measurement and different measurement methods, please allow 1-3cm deviation. Thanks! Russian Friend Pay Attention Please!!! Please fill in receiver's full name in the order due to new policy of Russian customs,otherwise you probably won't receive package finally.