2x Air Fuel Ratio Oxygen O2 Sensor Upper&Under For 02-05 Honda Civic Si SiR 2.0L

Upstream & Downstream Oxygen sensor

4 wire configuration

High Quality & Fast Shipping

This products is new, aftermarket replacement part that has the following specifications:

*Direct Fit & Easy install

*Correct Connector No cutting or splicing

Note:

The compatibility list is reference only and every model has slight differences. First, check whether your car is in this list. Then, compare your original O2 sensor with our product display pictures, specifically that it has the same pattern and shape of the connector end plastic casing. If you are not sure, please feel free to send a picture to us so we can confirm for you.

Package including:

2Pcs Oxygen sensor (1*Upstream & 1*Downstream) as pictures

The photos usually show the actual products to be shipped

Fitment:

2002 Acura RSX Base - 2.0L Exc. Type S; Manual Trans
2002 Acura RSX L - 2.0L Exc. Type S; Manual Trans
2003 Acura RSX Base - 2.0L Exc. Type S; Manual Trans
2003 Acura RSX L - 2.0L Exc. Type S; Manual Trans
2004 Acura RSX Base - 2.0L Exc. Type S; Manual Trans
2002 Honda Civic Si - 2.0L 
2002 Honda Civic SiR - 2.0L 
2003 Honda Civic Si - 2.0L 
2003 Honda Civic SiR - 2.0L 
2004 Honda Civic Si - 2.0L 
2004 Honda Civic SiR - 2.0L 
2005 Honda Civic Si - 2.0L

Must Know Before Buying:
The following information is for instructional and guidance reference only. We try and make them as accurate as we can.If Check Engine Light is on or an OBDII Trouble/Fault code occurs after installation, check the sensor with a voltmeter as below. If the sensor is good, further diagnosis is required. There're many different codes for specific functional failures, which are NOT necessarily relevant to the sensor. Find out what the Code means before leaving any feedbacks. Items that have been installed, altered or contaminated are non-returnable. ONLY a defective sensor after tested by a voltmeter is applied to manufacturer warranty.
20% restocking fee is required if buyer bought wrong items due to not paying attention to fitment information and ask for return.
The Price, Quality & Funcitonality of the O2 Sensor is fully covered under our warranty & return policy. However, refund for any labor cost, expense in a dealer shop or damage due to wrong installation is NOT covered.
Q: How do I know the O2 sensor is good or not? （Online Video）

A: The only way to know if the O2 sensor is functioning normally is to check its responsiveness to changes in the air/fuel mixture, by Voltage Measurement or Waveform Simulation.

Use a 10-megaohm digital voltmeter. Hook up the voltmeter's red probe to the sensor's signal wire and the black probe to engine ground. (Use back probe method, DO NOT pierce the wire.) For a good sensor, voltage should fluctuate constantly between 0.1 and 0.9 volts after starting the engine for 2 or 3 minutes.

Please take a video clip of the voltmeter and contact us if our sensor:

Goes above range between 0.1 and 0.9 volt
Remains below 0.5 volts
Stays fixed at a particular voltage
You're free to choose replacement or refund if our sensor fails to work, in this case.