Hi
Airbag lights are common, 99.9% of the time, its the Seat Weight module/plug thing, under the driver and passenger seat. Have a play with it to see if it goes away, IF NOT, put a resistor in.
Washer Jet is either the motor is dead or the plug is not plugged in.
Most parts of your car are similar/same to the V35 Skyline/Infinity