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- Denver, CO
Anyone got a link on HOW TO replace the trans fluid in a 2017+ CX5?
I'll have to see if I can find the doc (I have one somewhere), but essentially for a drain and fill service, the transmission has a drain plug (for my gen 1, same hex style drain plug as the engine oil plug). Not sure the 2017 is still hex plug or not.
When you remove the dipstick, that hole acts as the fill port. Be careful though. The way they designed the dipstick, it is very easy for dirt to be under the part of it that sits against the transmission and around the hole. Clean it and be extra careful not to drop any of that dirt and debris into the hole. Detailing clay works great...
Anyway, you should start by measuring the fluid. Many CX-5s seem to be under-filled slightly from the factory, so you can't necessarily just replace the same amount you drain. The quick and dirty is to measure it with car running when the blue dash light turns off (gen 1), or whatever indicator the gen 2 has for when the engine is warmed up. If you want to get more precise temperature wise, there are specific ODBII readers/apps you can use. Measurement needs to be done at 122F.
Anyway, to access the transmission pan/drain plug, you'll need to remove the underbody paneling. The transmission pan is on the driver's side. Remove the drain plug and you can expect to drain anywhere from 2-5 quarts. (Mine was 3.5 quarts). When you are done draining, put the plug back on with a new crush washer (same kind used for engine oil drain plug), with same torque (22-29 ft. lb. if I recall, I just do 25). Use a long funnel and refill amount drained plus any extra that may be needed if under-filled. (I drained 3.5 quarts, but required approx. 3.7 to fill to correct level on mine).
Put the dipstick back in, start it up, cycle through the gears, etc. and double-check fluid measurement on dipstick. If all good, close it all back up.
Note: some people access the dipstick from below the car with the panel removed so that you don't have to mess with the airbox. Alternatively can take the airbox out, reattach it so that it is out of the way of the dipstick so that you can still run the car and measure it appropriately.