NISSAN 2011 Quest - Owner's Manual - Manual (Page 401)

Black plate (397,1)
Model "E52-D" EDITED: 2010/ 10/ 25
this may damage them.
Chemicals used for road surface deicing are
extremely corrosive. They accelerate corrosion
and deterioration of underbody components
such as the exhaust system, fuel and brake
lines, brake cables, floor pan and fenders.
In winter, the underbody must be cleaned
periodically.
For additional protection against rust and
corrosion, which may be required in some areas,
consult a NISSAN dealer.
Appearance and care 7-7