If you remove the air filter cabin, you can work with filling plug easily. According the dealer; 1- drain all fluid from transmission. 2- fill the transmission with 4,5 qt new fluid. 3- start the engine then while pressing the brake pedal, move the gear on all of modes. Make sure you make it twice or 3 times and wait on each mode about 5-10 sec. 4- Drive the car about 5 min with all gears. 5- park your car and open the drain plug and take overfilled out. 6- close the drain plug then you are ready. you do not need to measure how much fluid take it out. If old owner overfilled the transmission, you will overfill it. that's why that transmission has level adjustment plug. If your drain plug is rusted, you should replace it with brand new one otherwise, it will be slipped. Drain plug+rubber oring+level adjustment plug+washer = ~$46 at dealer.

I just did this a few days ago and would like to share some tips. My 2015 has approximately 50,000 miles and I used Valvoline Max-Life. 1) I decided to take out the airbox first. There are two bolts underneath the airbox that are a pain to get out/back in. It will take a while. A 1/4 rachet and socket will just fit. Be prepared to have your hands scraped up if you don't use gloves. 2) I thought I could get the fill plug out easier with the airbox removed; however, there is not enough space to really get enough leverage to loosen it. As you can see from the video, it's on very tight. I almost completely stripped it. I ended up putting a few extensions together where I could get a good push behind the ratchet and it finally budged. The fill bolt itself is at about a 20 degree angle towards the front of the car so keep that in mind. In all, the airbox made it easier to fill the transmission but i still needed the extensions to get the plug loose. I also didn't have to magnetize the socket or worry about losing the fill plug. There are advantages/disadvantages to either method. 3) When draining the fluid, remove the level plug and let the fluid run out. Then slightly loosen the drain plug with the hex socket. Put the level plug back into the drain plug and hand remove the drain plug. This will prevent fluid from constantly draining out of the hole and down your arm as you remove the drain plug. This, in turn, will allow you to more accurately measure the volume that was removed since the fluid won't be going everywhere. 4) To measure the fluid removed, pour it into a gallon ice tea, kool-aid, etc pitcher. It has volume markings on the side and the opening is obviously wider than an old motor oil container so less chance of tipping over and spilling. 5) When filling the transmission, I highly recommend a measuring funnel like the FloTool Measu-Funnel. It has volume measurements on the side and a twist valve to control the rate of flow of new fluid into the transmission. My CX-9 shifts silky smooth now. I highly recommend doing it. Hope this helps.

great video, I just did a fluid change on my 07 awd, fill through dipstick tube and 10 mm hex for drain plug on my 07 model

Excelente instrucción muy ilustrativo, gracias

Great Vid. Is it possible to fill the transmission oil through the fill valve (small T40 screw head) using a fill adapter? That saves trouble of accessing the fill valve under the hood.

Prasad, I really enjoyed your video and did a drain and refill on my own 2013 CX9. It is a 3.7 liter Front wheel drive (not AWD) the first refill went well with exactly 50ml added to what came out but on the second refill I left the small drain plug out and lost some fluid coming out over the fill tube. I wonder if you know how much fluid should be in the transmission above the fill tube so I might be able to partially drain down to the fill tube level and refill again to make sure I have not over filled. Looking forward to your reply, and thank for making such a useful presentation.

Спасибо большое. 🙏 Хорошее видео 👍

Bro your video was awesome. Thanks 🙏

Hi Prasad. What is the OD size of the clear tubing you used to pour in the fluid?

Thanks for the vid but I think I would end up removing the intake to make lifer easier.

Saludos le hablo desde república dominicana, una pregunta cuento cuánto d aceite d trasmisión se llevó ese cambio, le pregunto porque tengo una mazda cx9 año 2007 y le quiero hacer el cambio d aceite, gracias por anticipada

Thanks for the video; this is helpful. I am about to change my transmission oil. Quick question: is there a reason on why you are using a 1/2 ratchet and another 3/8 ratchet? Could this be done with only 1 ratchet as long as the sockets and extension are same measure? Thanks in advance for your clarification!

My Mazda has a dip stick for the trans? But it’s full of problems right now and only had it 6 months

Remove the airbox and make your life much easier to access the fill plug. Only a couple of bolts.

Hi Prasad, How do you know the fluid level? Thanks

Changing the filter? How is that done? I don't even see a pan on the botom, as I'm used to. I see a sealed pan mounted to the side of the transmission. Is that what I need to pull?

Perfet

2007 CX9 has a dipstick and the plug is a 10MM hex. Just wanting others to know after driving 20 miles to buy Torx sockets and the 17MM hex that can all be returned as I did not need them,

Thanks for putting together this great video. Two questions; First, since there is a separate fill plug, is it necessary to measure the fluid removed and then put in the exact amount back in to ensure the correct level? Why not just fill till the level plug overflows? Second, does the transmission pan come off on this transmission to allow access to the filter? I just bought a 2011 CX-9 with ~100K on it and I doubt the tranny was ever serviced. I was planning on doing a full flush with new filter if possible so I'd like to know if you can actually get to the filter with this transmission. From what I'm reading, it seems the "sealed" transmission is just like the previous model unsealed version with the dipstick removed. Thanks

the music is annoying af!

I wish someone would do this for 2017 model.

I have a 2008 Mazda CX-9 and it has a dipstick. Does anyone know if the dipstick tube can be used to fill the transmission?

I have cx9 2014 auto transmission. Periodically I change gear oil btn 40k to 50k Kms / This time mechanic said old oil is very bad so he just changed 3.5 Ltr only n put same amount of new oil but he made me scared to drive slow and I should not push my accelerator pedal high or hard to race up or drive fast??? it is hard to drive on slow motion like slow speed on express ways and at signals . Kindly advice me as what should I do or don’ts??? Thank you

Hi I have a Mazda CX 9 Model The walkway is 211,000 km The oil is black There is a problem with numbers 4 and 5 Ride but do not walk What is the problem and what is the solution?

Will this procedure work on a 2014 mazda 6 with a sealed transmission? They say my car has a sealed transmission with a lifetime fluid. Was this car in the video with a sealed transmission??

Is the procedure the same for two wheel drive vehicles?

So how do you verify that the level is correct. This video assumes that the amount of fluid is correct but it may not be.

OMG! THANK YOU for this! I've being wondering if anyone had done that yet on exactly this model year's CX9. I've being turned down by 2 Mazda dealers and an independent garage so far. All citing "sealed transmission". Went under the car to take a look at the transmission housing today. (Before this video). I was even ready to just drop the entire transmission pan... to find there is NO transmission pan. (damn) Saw a bunch of bolts, but all looked strange and didn't seem like drain plug. With this video though, I know for sure which bolt it is now. Question: Did you consider removing the battery for easier access to the fill plug?

Atf??????

Helpful but cringed everytime I saw the word, "oil".