It can be done. Looks like a drain and fill according to the service manual. However, I bet you can unhook a hose from the transmission cooler and attach a drain hose to the cooler and pump/fill/flush, like I used to do with my Mazda 3. Better then drain and fill. BTW. It is not a sealed unit. It has a dipstick, you have to remove under cover to access it. It is short and secured down by a bolt. It is a short dipstick. Not the usual access from above like oil dipstick.
2013 - CX-5 - Transmission/Transaxle
AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FW6A-EL, FW6AX-EL]
WARNING:
Do not perform the servicing while the ATF is hot. Otherwise, it could cause severe burnsor serious injury.
1. Remove the front under cover No.2. (See FRONT UNDER COVER No.2REMOVAL/INSTALLATION.)
2. Remove the dipstick securing bolt.
3. Remove the dipstick.
4. Remove the drain plug and washer, and drain the ATF.
5. Install a new washer and drain plug.
Tightening torque
30—41 Nm {3.1—4.1 kgfm, 23—30 ftlbf}
6. Add ATF from the dipstick installation hole.
NOTE:
The ATF color is blue.
Only use ATF FZ for the FW6A-EL, FW6AX-EL.
AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FW6A-EL, FW6AX-EL]
http://am.mazdaserviceinfo.com/emaz...3/CX5/mv/books/mvw05/html/id0517h2118600.html[1/7/13
9:53:37 AM]
ATF type
ATF FZ
Resupply amount (Reference)
ATF is drained from drain plug: 3.5—4.9 L {3.7—5.1 US qt, 3.1—4.3 Imp qt}
7. Adjust the ATF level. (See AUTOMATIC TRANSAXLE FLUID (ATF) ADJUSTMENT [FW6A-EL,FW6AX-EL].)
8. Insert the dipstick and install the securing bolt.
Tightening torque
8—11 Nm {82—112 kgfcm, 71—97 inlbf}
9. Install the front under cover No.2. (See FRONT UNDER COVER No.2 REMOVAL/INSTALLATION.