O2 Oxygen Sensor Upstream or Downstream Front Rear for Buick Century Rendezvous Chevrolet Impala Venture Pontiac Aztek 234-4343 |

O2 Oxygen Sensor Upstream or Downstream Front Rear for Buick Century Rendezvous Chevrolet Impala Venture Pontiac Aztek 234-4343 |

Replaaces OEM Part Number:

Fit for:

2005 Buick Century 3.1L Upstream
2005 Buick Rendezvous 3.4L Upstream
2003 2004 2005 Chevrolet Blazer 4.3L Upstream or Downstream
2003 2004 Chevrolet S10 4.3L Upstream or Downstream
2005 Chevrolet Impala 3.4L Upstream
2005 Chevrolet Monte Carlo 3.4L Upstream
2005 Chevrolet Venture 3.4L Upstream
2003 2004 2005 GMC Jimmy 4.3L Upstream or Downstream
2003 2004 GMC Sonoma 4.3L Upstream or Downstream
2005 Pontiac Aztek 3.4L Upstream
2005 Pontiac Grand Am 3.4L Upstream
2005 Pontiac Montana 3.4L Upstream

Must Know Before Buying:

 

 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.