ITEM NAME:234-4018 Downstream Sensor 2 Oxygen O2 Sensor For Chevy C2500 K1500 C1500 E I2N4 234-4018 Downstream Sensor 2 Oxygen O2 Sensor For Chevy C2500 K1500 C1500 E I2N4 Interchange Number: Replaces# 234-4018 213-1331 AFS106 21539 213-3538 19178958 Length (Sensor to Lead):430 mm (16.94 inch). Directly Fit your vehicle when the plug and the length is the same as your original sensor. Quality: oxygen sensors are produced as the OE standards which can prevent premature failure of the catalytic converter, reduce harmful emissions, improve engine performance and increase fuel efficiency. Bank 1 Sensor 1 means Upstream Right/Rear;Bank 2 Sensor 1 means Upstream Left/Front;Bank 1 Sensor 2 means Downstream Right/Rear;Bank 2 Sensor 2 means Downstream Left/Front. Please check the description or use the year/make/model drop down bar and interchangeable part numbers to confirm the compatibility before purchasing. Product Features Note: Please check the MAKE/MODEL/YEAR/POSITION of your vehicle and make sure oxygen sensor is compatible. Oxygen Sensor Specifications: High Quality and Brand New (Not Air Fuel Ratio Sensor) Direct Plug-In Replacement Wires: 4 wires Length: 30cm Heated: Yes Attention! Bank 1 Sensor 1 means Upstream Right/Rear; Bank 2 Sensor 1 means Upstream Left/Front; Bank 1 Sensor 2 means Downstream Right/Rear; Bank 2 Sensor 2 means Downstream Left/Front. Many buyers brought the wrong Oxygen Sensor because they donot pay attention to the plug and the length of the sensor. Please check these 2 features before purchase. Replacing a defective O2 sensor helps make your engine operating efficiently, maximizing the performance. A defective oxygen sensor can cause your catalytic converter to fail prematurely. Replacing a catalytic converter can cost thousands of dollars, please make sure you replaced the right oxygen sensor! Replacing a defective oxygen sensor is the most effective way to control the combustion process and reduce em
