SOURCE: 2001 Mazda MPV upper front oxygen sensor change
I replaced this sensor about 6 months ago. (If this is the sensor that is located near the firewall on the exhaust manifold under the ignition coil.) The only way to easily replace it, is to remove the MAF and air filter assy. then remove the intake plenum, remove the ignition coil, and then you'll have access to the sensor. You'll need a sensor removal socket. If the socket slips around the hex of the sensor, then you'll need to use a regular deepwell socket and cut the cable from the top of the sensor, or use a combination wrench that will fit it.
The most difficult part of removing the intake plenum is getting the nut loose from the EGR valve. DO NOT just remove the two bolts holding it to the intake plenum. It will not line up correctly during re-assembly and may not seal tightly either.
This took about a Saturday to do. You'll need new plenum gaskets to replace the old. While your at it remove the throttle body and clean the carbon from the ports that lead to the EGR valve and replace that gasket as well. The gaskets will run about $30.
SOURCE: 2004 mazda MPv Where is the location of cyl. #6?
The firing order is 1-4-2-5-3-6. The cylinders are, front bank is from drivers side to passenger, 6-5-4 , and 3-2-1 at the firewall.
SOURCE: where are spark plugs located on 2005 Mazda MPV
go to the link, the engine is the right one, the model is different but the procedures are the sam, there are good photo's of the job in progress.
http://www.imazda.com/forums/showthread.php?t=3059
SOURCE: where is iat sensor located on 2000 mazda mpv van
the IAT sensor is part of the Mass Airflow sensor. here is a picture of that sensor.
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Oldsmobile Manifold Absolute Pressure (MAP) Sensor...
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Working of Manifold Absolute Pressure (MAP) Sensor...
--------------These will help.Thanks.
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