Post 1:
Problem - The Sentras commonly do not meet Nissan Specs for rear alignment. Many are off about 1.2 degrees or about 3/8 inches for Toe In.
Symptom - excessive rear tire wear demonstrated by diagonal wear lines and load tire noise. Effectively hidden during the warranty period by rotating the tires. Refer to Honda Service Bulletin 08-001 for a good explanation and pictures. Honda has a similar problem that they owned up to and are correcting. What does that say about Nissan?
Post 2:
I had an identical experience with my 2007 Sentra. After months of haggling through all of the Nissan mazes, they offered me $2,000 and two new tires to go away. I took it, and instead of going away, I went to a wheel alignment specialist, and for $325, he corrected the problem. It sounds like I made out pretty good, especially since my gas mileage went up from 34 to 38 on the highway.
Post 3:
I am so glad I just found this forum! My 2008 Sentra was just in an accident due to slippery conditions on my worn tires. I have attempted to rotate the tires as scheduled and checked them again before winter. I could not believe that the rears always looked worse than the front. I also could not believe all four were getting pretty bad and the car isn't one year old yet.
Post 4:
I just updated the other thread about this. I got a resolution from Nissan, they only paid for two new tires, but I got something at least, check here <link>
Post 5:
I'm not sure if this is the right place to post this, but I have a 2007 Sentra 2.0S and have symptoms consistent with rear alignment problem described in this thread.
(update) :
Rear alignment update: I took my 07 Sentra to a well recommended alignment shop to perform a front and rear alignment. They found that the rear alignment was off, specifically the toe-in (as suspected). They installed shims to to fix the problem, only cost $35 more on top of the regular $100 for the alignment. Will update in a few months if rear tire wear and fuel economy have improved.
Post 6:
I've had a very similar experience, got my '07 in '08 with 16k miles, thought I got a great deal, now I realize I got a pile of crap. Within 4k miles the tires that came with the car were shot. Took it to Nissan, they told me it was an alignment problem, not under warranty, and that I had to get a four-wheel alignment every 12k miles! I had a '92 Camry that I bought in '99, put 260k miles on it and only did two alignments ever. That averages to 130k between alignments, and Nissan wants me to spend $100+ every six months or so? Not to mention when I finally got the recall notice for the airbags, they informed me of the brake master cylinder recall which I did NOT hear of, so if the brakes had gone out and I wrecked, congratulations, the airbags don't work properly either! Also, not to nitpick but the cheap plastic covers on the visor mirrors both broke off within months of buying the car, I've been a quart low on oil twice when getting an oil change, yet no sign of leaks so apparently it's burning oil sporadically, and now it sounds like the power steering is going out.
Post 7:
Every company has their lemons, but at least our previous two Camrys didn't actively try to kill us. Today in the rain the rear kicked out, nearly turned us sideways on the highway. I know the Firestone has the shims, I talked to another Sentra owner with the exact same problem (Nissan, you listening to this?!) and they fixed him right up, $179 lifetime 4-wheel alignment, took them two hours on a busy Friday. I'm planning on sending a copy of the receipt and printouts of some of these threads to Nissan along with a note to remove head from sphincter.