Here are a working key and a new key, both are 433Mhz.
Connect Key Tool Plus with OBD, then get to start:
Immo programming >> Mazda >> CX-5 >> 2017- >> Begin >> Add a key
Follow the prompts to operate:
Switch ignition on.
Current number of smart keys: 2, press “Yes” to continue.
Read the password…
Completed to read password, press “OK” to match.
Configuring the system, 7 minutes are needed, please wait…
Step on brakes when automatic-shift, step on the clutch when manual-shift, and keep the maker end of the smart key close to the start button.
Key matched successfully! Current number of smart keys: 3
Complete the following steps after program is successfully.
Switch ignition off, then step on brakes, click the start button by the smart key to be added to start the engine for 3s, then switch ignition off.
Operation complete.
Let’s test the keys now, all are workable.
Key programming was successful!
This is using VVDI Key Tool Plus to program a new key for Mazda CX5 2020.