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Try the MAF sensor, Fuel Filter, Air Filter, Check tire Pressures for Better MPG about the rough idle there was a service bulletin in 1993 about the idle air control motor maybe that's your problem.
If your talking about the link stabilizer bushings is not so hard, it is difficult if you dont have the right tools.
Try the CAMSHAFT & CRANKSHAFT Position Sensors.
02 sensor is mounted on the exhaust pipe below the exhaust manifold, it comes with a pigtail that must be protected, disconnect the negative battery cable, disconnect the sensor and replace it make sure not to contaminated the new one. for visual aids sent your request to sinautoscan.com/forum
You will fail the Yearly inspection, in some cars you could have your car misfire, sometimes if you leave your gas cap loose it can cause the EGR code try to replace the Gas Cap and reset the engine light with a Scantool or by disconnecting the battery terminals for 10mins if your radio is OEM from Nissan Make sure you have the radio code before you do this or simply buy a scantool Sinautoscan.com offers some for cheap.
You may also try replacing the brake light control module
broken wire, brake light control module, brake light switch defective
You have to take down the fuel tank to get to it, i can attach an diagram sent the request to sinautoscan.com under forum
try going to an autozone to get a free diagnostic to see what your code is once you got it go sinautoscan.com under forum search for the code to find the probable causes
if it shifts hard from park to reverse look into you engine and transmission mounts about the noise check the front wheel bearings.