Yes
you should have a 4 wheel alignment done
Yes
I was just quoted $225ish by Crown Nissan Winnipeg. A bit high for my liking!
After some negotiation, I was able to get a Nissan dealer to replace them for about $600, including parts and labor.
Yes. The new struts will throw off the camber; thus requiring an adjustment.
struts front. shocks rear.
yes when I put on lowering springs, the back seat had to be taken out
front has struts and the rear haas shocks
It is probably a good idea to get an alignment after doing any kind of work on the front end. If you have struts on the rear and take them off it is not as big a deal but, an alignment is a lot cheaper than replacing tires that wear prematurely because they are not properly aligned.
If they are leaking, damaged, the car sits unlevel, or if after pushing down on the car the car bounces, they probably need replacing. Labor costs should be around $125 and the struts are about $100 each. A wheel alignment is recommended when replacing struts and runs about $60.
NO That depends on how the struts attach to the knuckle or control arm. On some front wheel drives an alignment is required.
It is common to have a knocking or clunking noise of a 99 Nissan Altima, even after the struts have been replaced. This may be due to worn ball joints. It is best to replace the ball joints, too.