2pcs O2 Oxygen Sensor for Mazda 5 2.3L 2006-2007 Mazda 3 2.0L 2.3L 2004 2005 Upstream Downstream 4 Wires Lambda Auto Parts

Replaces OEM Part Number:

234-4390 234-4396 Fit for:

2004Mazda 3 L4-2.0LCanada & Exc Calif. 2005Mazda 3 L4-2.3L 2006-2007Mazda 5 L4-2.3L 2004Mazda 3 L4-2.3L 2005Mazda 3 L4-2.0LCanada & Exc Calif.

Package included: 2 * Oxygen Sensor Note: 1. Please check OEM number before purchasing. 2. Please allow 1-2cm error due to manual measurement. Thanks for your understanding. 3. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.

Must Know Before Buying:

A: The only way to know if the O2 sensor is functioning normally is to check its responsivene to changes in the air/fuel mixture, by Voltage Measurement or Waveform Simulation. Use a 10-mega 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 cl 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 if our sensor fails to work, in this case.

About shping
Shping and Packaging All it will be double checked and well packed before sending.It will be dispatched within 2 business days after buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for e areas,it may take a little longer). 

Special Announcement:
Please fill in the correct and detailed consignee, address and phone number in the order. For fast and correct delivery.If you do not receive order within 30 working days,please feel free to contact Customer Service before leaving Negative and Neutral Feedback, we will do our best to help you resoe the problem.TaxNo, you will only pay what is quoted as total cost at checkout, no more. You are not expected to pay any additional duties or taxes. If you are asked by Customs or our logistic partner to pay duties, please contact our Customer Service .

Your 100% satisfaction is very ant to us
If the product is not on good condition, You can return this product within 14 working days, please contact customer service center before returning.FeedbackYour satisfaction is our first priorityIf you receive the order and it is in good condition,we would be grateful if you would leave us 5 star Positive Feedback for the transaction.