When driving our Nissan Leaf from 4000 feet altitude up to about 7000 feet altitude (about 2500 feet altitude change), something under the left rear passenger side of the car (behind the driver) makes a loud bang and can be felt through the foot-well or floor. This happens every time we drive the same section of road, which is usually twice a week. Internet research suggests other Nissan Leaf owners have had the same issue and at altitude, and that it may be a issue with compression and expansion of the battery case. I have reported this before, but am reporting it again as it continues to occur.

- Park City, UT, USA

When driving our 2017 Nissan Leaf electric vehicle at about 65 mph up a steep hill / steep incline, we are experiencing a loud clunk from the battery area when the vehicle climbs over 2000ft elevation within a short distance (16 miles). The clunk always happens within the same 1 mile stretch of road and happens every time we drive the car from salt lake city, ut (4,226 feet) to summit park, ut (6,887 feet). We first noticed it this summer 2019. There is an audible clunk and it can be felt through the passenger foot-well behind the driver's seat. There is a thread on the mynissanleaf.com discussion forum that describes the same issue (www.mynissanleaf.com/viewtopic.php?F=30&T=19883&P=565545#P565545). The contributors think it has something to do with the electric battery case expanding or contracting under pressure. I'm planning on letting the Nissan dealership know and pointing them to the discussion forum (the discussion information is here: www.mynissanleaf.com/viewtopic.php?F=30&T=19883&P=565545#P565545)

- Park City, UT, USA

Brake failure at low speeds. In the last eight months I have owned this vehicle, twice the car failed to stop when I applied brakes. I was going at around 20-25 mph in both the cases.

- Cupertino, CA, USA