Reduce fuel effciency The sensor achieves optimal engine performance by monitoring the oxygen content in a vehicle’s exhaust and regulating the air/fuel mixture to the ideal ratio of 14.7 parts air to 1 part fuel Improved engine performance A correctly operating oxygen sensor ensures efficient engine operation by making sure the engine is receiving the correct air/fuel mixture and thereby preventing the engine running lean or rich Lower Emissions If the optimum fuel mixture is not maintained, the engine can emit harmful amounts of carbon monoxide and excessive levels of hydrocarbons Protect the exhaust pipe As the catalytic converter is responsible for eliminating harmful gasses from the vehicle’s exhaust system, an incorrectly operating oxygen sensor can cause premature damage to your catalytic converter KUHTYB Right Upstream and Downstream Oxygen Sensor Compatible with TOYOTA 2014-2013 TUNDRA 4L Fitment: Compatible with TOYOTA 2014-2013 TUNDRA V6-4.0 OE# 234-9111 234-4926 How to replace an oxygen sensor 1.Disconnect the oxygen sensor, Remove the oxygen sensor Remove the cover, slowly unscrew the oxygen sensor plug before opening the triangle iron can see their own oxygen sensor. 2.Compare the oxygen sensor The problem can be seen by comparing the removed sensor with the newly purchased oxygen sensor. 3. Install the new sensor and connect the harness Install the new oxygen sensor according to the position of the original oxygen sensor, Screw the plug to the joint. 4.Clear the codes then start the vehicle After the installation is completed, start the vehicle and check whether it is running normally