I am in the same boat; looking for a winter set up. I have been looking around and I think the 2018 Leaf uses 433 MHz. I came across this cloning TPMS from Autel (https://www.newegg.ca/Product/Product.a ... -_-Product
). I am just waiting on their confirmation to make sure that it will work on 2018 Leaf.
So I got a response from Autel, but not sure if it really helps.
"Good day. Well, we do have TPMS tool for Nissan Leaf, but i am sorry our device can not support it at 2018 Year. More details, you can confirm on Autel Official website below."
In checking on Autel website, they listed US Nissan Leaf 01/2013-12/2018 uses 315MHz and US Nissan Leaf 01/2018-12/2018 uses 433MHz, so I cannot make out which frequency is the correct one for my 2018 Leaf. I got the car in April, 2018. It's probably best to get the TPMS with dual frequency as suggested by one of the members. However, I would appreciated if anyone had tried the Autel MaxiTPMS Pad programmer and confirm that it works on 2018 Leaf before I order one.