I live in Maui Hawaii and have a 2019 Leaf SV, I also live half way up a 10,000 foot mountain. I have been having the same issue with the grabby brakes. I also have a neighbor that also has a 2019 Leaf SV. We only experience the "grabby brakes" when descending the hill. It can get quite violent when trying to come to a stop from hwy speed. At first I thought that I had a warped rotor possibly because of the heat generated when coming down from the mountain. So I purchased a set of high performance Drilled and slotted rotors the help dissipate any heat generated. I also visually inspected the break pads to look for cracks or uneven wear. My Neighbor had the same issue and also replaced their rotors. We are both experiencing the same issue. Once off the hill on flat ground there is no issue, the brakes work great. I just had to have the dealer replace the Power Delivery Module, ( https://static.nhtsa.gov/odi/tsbs/2019/MC-10170015-0001.pdf ) so I had them go thru the breaks at the same time. They found NOTHING, and said that I need to install the stock rotors and see if that solves the problem. My next move was going to be to change the break pads even though they don't need it and/or to replace the tires again even though they don't need to be replaced Apparently with everyone talking about the same problem at different levels something is wrong. Because I live on a 10.000 foot mountain and drive to sea level every day my issue is a little more pronounced, as is my neighbor. I am kind of at my wits end with this. I corrected what I thought it was, then took it to the dealer sitll with no resolution. I was also thinking about the regen system issue and was hoping that the new PDM would help but no joy on that one. My last thought was possibly the anti-lock breaking system? but don't know where to go after the dealer, and we only have one on Maui, just told me to replace the stock rotors!
If anyone has any more insight on what appears to be a prevalent problem I would love to hear it!
Aloha,
plseitz