My family lives in Vancouver and Halifax and we have a Leaf in both locations. In Halifax when buying a 2016 Leaf we followed the dealer's advise to have undercoating applied. When buying a 2018 Leaf in Vancouver, the salesperson there said that undercoating shouldn't be done to Leafs. I didn't ask why, but I presumed that it may interfere with the battery pack's ability to transfer heat from the pack to the outside air. Recently the Halifax dealer suggested the car have the undercoating reapplied (obviously looking for more money), but it did make me wonder what Nissan specifies. I filled in an online contact form asking what their advice is. Here's their answer, "We are unable to provide technical advice as the technicians at the dealership would be able to do this. Please contact your Nissan dealership as they will be in the best position to assist." I find the response curious, to say the least, as I would have thought that it would be Nissan advising its dealers on what should be done with the cars they manufacture, especially when undercoating could affect the health of the battery pack.