Where do I find the transmission filter on a Mazda 2002 MPV

On the bottom of the transmission will be a transmission pan plater with maybe 8 or 10 bolts holding it on. The transmission filter us underneath that plate. When you refill the transmission you will want to use Dexron/Mercon IV fluid.
To change the filter (and gasket) they should come as a set.

1. Put a pan under the transmission as you will loose two quarts maybe a little more.
2. Loosen the bolts starting with the bolt farthest from you working your way evenly back.
3. Soon fluid will start to drain. Let it drain as it goes. Give it a little time before continuing.
4. When you get to the last bolt or two hold the pan firm while removing the bolts and lean the pan away from you and empty the pan of all fluid.
5. Now remove the two screws holding the transmission filter in place and pull down on the filter.
6. Now you want to clean the inside of the pan real good. Brake clean to soap and water will work.
7. Dry the pan real real good. Should be almost shinny.
8. Now place the new filter where the old one was removed from.
9. Now line the gasket up on the pan and set it against the transmission.
10. Get a start on a few of the bolts so the pan will stay put.
11. As you tighten the rest of the bolts you will want to tighten cross ways. Like you would a wheel.
12. Now you will want to refill the transmission fluid to proper level. Your manual will tell you the exact amount but for this car two quarts would be a good starting point.
13. Now start the car and look underneath the car and inspect for leaks.
14. Now put your foot on the brake and just shift your vehicle into every gear a couple times. All the way down then all the way up. This fills the pockets.
15. Now put the emergency brake on and put the car into neutral and check the fluid. Adjust accordingly. Mind the area on the dipstick for a "cold check" as the transmission will still be cool at this point.

The filter is inside the transmission and not intended to be a servicable item.If you are just doing maintenance then just drain and fill the unit.If this unit does not have a dipstick then you will need to fill it through a small allen head plug in the bottom.If you are trying to fix a problem a new filter will not be the fix.let me know if I can help.

In order to access the trans filter the transmission pan must be removed and it will be right there. pull out the old filter put in new filter, install trans pan with new gasket ( comes with trans filter kit) and fill with fluid to correct level. remember to check fluid level with car running and fluid warm on a flat level surface.