Depends on the engine 2.3 or 2.5.
My 99 2.5 has four.
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 many oxgen sensors on a 1995 millenia
how many oxygen sensors are on a 1997 Mazda mpv lx
Depends on Which Year and Which Engine (2.3 or 2.5) My 99 2.5L has 4 o2 PLUS a knock sensor
Four
I have a 99 millenia myself and it has 4 (four) 02 sensors, and each go for around 200-450 in price. I don't really know where they are located though, but i do know they can cause your check engine light to come on and flash from time to time, as well as the car hesitating and feeling like it is going to stall.
a Mazda millenia with a miller cycl engine 2.3 engine has 6 igition coils
Two, one in fron of the catalytic convertor and one behind it.
The Mazda millenia from 2000 gets 20 mpg, 28 on the highway, and 25 on average.
I think on the 97 it was 3. (On my 99 it is 4) Good luck identifying Exactly which ones you need replaced since two of the 3 are on the same circuit so the bank and circuit error code will result in a "One of Two or Both " guessing game.
4. 1 before the precat in each exhaust manifold and 1 following the precat in each exhaust manifold. The main cat under the car is not monitored by the ECU.
It has four oxygen sensors.
The Jetta has two oxygen sensors.