Question 1

What should be noted when servicing an oxygen sensor on Mazda 6?

Accepted Answer

When servicing an oxygen sensor, it is worth pointing out that such sensors are fitted at the exhaust manifold or pipe which at times is hard to loosen as it contracts when the engine is cold. To prevent scalding the sensor or the threading, it is advisable to wait a minute or two and first start the engine and then run the engine to avoid damaging the sensor or its screwing threads beforehand. Oxygen sensors are permanently fitted with a pigtail and electric connection that must not be broken or taken off because they will not help to use the sensor. Do not get grease, dirt, and other contaminants on the electrical connector or the louvered end of the sensor, and avoid using any cleaning solvents on it. Be gentle with the sensor to avoid dropping and rough handling of the sensor and make sure the silicone boot fits in place to prevent melting and complications in its operation. In case of replacement, both the upstream and downstream sensors are applicable and the former is located at the upper end of the exhaust manifold/catalytic converter assembly and the latter at the lower end or right below the catalyst. Start by unplugging the cable on the negative battery, and then lift the front part of the car and place on jackstands in order to work on the sensors. Lift off the engine cover, follow the electrical lead of the oxygen sensor to the connector, and disconnect the oxygen sensor. Unscrew the sensor using a wrench or oxygen socket. When re-fitting an old sensor, lubricate the threads of the sensor using antiseize compound; when used with a new sensor, then this is not necessary as it is already covered. Lastly, the process of installation is the opposite of the removal, which means securing the oxygen sensor to the required amount of torque.

Question 2

How should one service an oxygen sensor to avoid damage and ensure proper installation on Mazda 3?

Accepted Answer

Handling an oxygen sensor: When cleaning an oxygen sensor, beware that it is fitted in exhaust manifold or pipe that may shrink during cooling process and hence it is hard to loosen when the engine is cold. To prevent damaging sensor or its mounting threads it is better to turn the engine on a minute or two then turn it off without burning yourself. The pigtail and electrical connector on oxygen sensors cannot be removed, and the destruction of any of them will cause the sensor to become useless. Avoid exposing the electrical connector and the louvered tip of the sensor to grease, dirt, or any other type of contaminant and should never apply any cleaning solvents to it. Be careful with the sensor to prevent drops or a rough treatment of the sensor, and make sure that the silicone boot is properly attached, and it does not melt and cause any operational problems. De-connect the cable with the negative battery post, raise the front of the vehicle, and hold it up with jackstands in place, and then remove the engine under-cover. On the upstream oxygen sensor, it is in the top of the catalytic converter assembly/integral exhaust manifold where you unscrew the sensor using a wrench or socket, dislinked the electrical connector, and disassembled any harness clips. When reinstalling the old sensor, place anti-seize compound on the threads, or in the case of a new sensor, there is some anti-seize compound on the new sensor. Installation is done in reverse order and this means that sensor is secured by tightening. In the case of downstream oxygen sensors, California emission models include two, non-California ones include one, which is in the lower end of the exhaust manifold/catalytic converter assembly or on the short part of the exhaust pipe after the catalyst. Identify the downstream sensor, unscrew the sensor, and unscrew the electrical connector, and unscrew any harness clips. Once more, use anti-seize compound in the event of re-installing the old sensor and tighten the sensor during installation.

Genuine Mazda Oxygen Sensor

199 Oxygen Sensors found

Mazda Oxygen Sensor Part Number: AJF5-18-861A

Mazda Oxygen Sensor Part Number: AJ58-18-861B

Mazda Oxygen Sensor Part Number: CA07-18-8G1A

Mazda Oxygen Sensor Part Number: AJ60-18-861B

Mazda Oxygen Sensor Part Number: CA41-18-861

Mazda Oxygen Sensor Part Number: L334-18-861B

Mazda Oxygen Sensor Part Number: L519-18-861C

Mazda Oxygen Sensor Part Number: FS1G-18-861A

Mazda Oxygen Sensor Part Number: L518-18-8G1A

Mazda Oxygen Sensor Part Number: PEDE-18-86Z

Mazda Oxygen Sensor Part Number: AJ59-18-861C

Mazda Oxygen Sensor Part Number: GY05-18-861A-9U

Mazda Oxygen Sensor Part Number: CA09-18-861

Mazda Oxygen Sensor Part Number: FS1K-18-861B

Mazda Oxygen Sensor Part Number: L394-18-861A

Mazda Oxygen Sensor Part Number: FS1H-18-861A

Mazda Oxygen Sensor Part Number: GY06-18-861A-9U

Mazda Oxygen Sensor Part Number: GY04-18-861B-9U

Mazda Oxygen Sensor Part Number: LF66-18-861C-9U

Mazda Oxygen Sensor Part Number: 1F20-18-860A

Mazda Oxygen Sensor

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