Sure you can. Go to a salvage yard and just purchase a wheel/tire combo off a wrecked Infiniti or any other car that will fit. Your problem may be where to store it if you do not have the proper storage area.
behind spare tire on gas tank
The fuel filter is located in front of the spare tire, easily reachable once you remove the spare tire. Tools to remove the spare tire are located under the carpet under the back seat.
245/70/16
Standard size - 255/65r16
There is a small hole on the outside edge beneath the carpeted area. Just look along the frame for a small hole, just left a a bit of center. You have to put the tire tool handle into this and crank it down, this will lower the spare from underneath. Hope this helps.
On the passenger side in the back seat, push the seat forward you will then find a crank handle. Open the crank as it is folded. You will find a slot put the crank in the slot and turn the crank until it stops. You will then find the spare tire on the ground under the trunk portion of the car. You can turn the bolt on the chain and you can remove the spare tire.
where is the IAT sensor located on 99 qx4 infiniti
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behind the rear tire on the drivers side under the mud flap
were is the thermostat located
Your auto parts dealer can give you this information when you purchase your spark plugs. But a 1998 Infiniti QX4 gap is .041.
2001 Infiniti QX4 Car Stereo Radio Wiring Diagram