A “Nissan genuine vacuum tank assy pressure” likely refers to the pressure within the vacuum tank assembly of a Nissan
vehicle. The vacuum tank is a component of the vehicle’s evaporative emission control system (EVAP) which is responsible
for preventing fuel vapors from escaping into the atmosphere. The pressure within the vacuum tank assembly can affect the
performance of the EVAP
system. It is important to ensure that the vacuum tank assembly pressure is at the correct level for proper operation of the
EVAP system, and using a genuine Nissan part would ensure that the part is manufactured to the specifications and
standards set by Nissan for that particular vehicle.