Do yourself a favour here, these are a bear for DIY.
Just pay a shop to do this because even though your codes may indicate which circuit or bank, two of the four for my engine for example, share the SAME location code which means Either or BOTH could be bad.
PLUS if you think you can just swap them out to until you find the bad one, the act of putting a good one on the same circuit as a bad one can make your new one fail on testing.
Been there, done that, got a dirty Tshirt to prove it.
M
Good Luck
how to change speedometer sensor on mazda millenia 2000 2.3 v6
2001 Mazda millenia
On top of the differential.
The Mazda millenia from 2000 gets 20 mpg, 28 on the highway, and 25 on average.
bottom
a Mazda millenia with a miller cycl engine 2.3 engine has 6 igition coils
millenia starting with my 2001 had cabin filters. 2000 my and before no hava
Button on the shifter.
air conditioning
It depends on what model of Mazda you have. My 2000 Mazda millenia doesn't. It does have reverse teeth though. I would have to go to a dealer to get another one made for it.
The code PO404 on a 2000 Mazda Millennia 2.3 means that there is something wrong with how the vehicle is processing the oxygen it needs for combustion. This would mean an oxygen sensor or solenoid is bad. This vehicle has two oxygen sensors.
The 2000 Mazda IAT sensor can be found on the back of the engine. The IAT sensor will be just above the bell housing.