Today I noticed that rear driver side of my 2004 G35 coupe sits quite lower than the other side. I believe everything is stock. The car has 58k miles on it, and drives and handles normally. Yes the surface is even. Do you guys think that a spring broke ? I am going to have it looked at tomorrow. Does anyone know a ballpark price to replace a spring ? Thanks

It could be 2 things, you are too fat or your rear shock has gone bad.

+1 on you being too fat. LoL

not very funny..

It's likely just a bad shock/spring... I had the same thing happen on my last car. Go push on your trunk and see if there's any give. If that side of the car just sits there and doesn't have any bounce to it at all that'll answear your question. As for the price... No Idea.

It's very unlikely to be a rear spring problem. Springs are generally very durable non-wear parts that will easily outlast the life of a car. Shocks on the other hand may have gone. It's also not uncommon for the car to sit higher on one side vs the other depending on how full/empty the gas tank may be, but it seems to be more common for people who have installed aftermarket springs where the drop is not equal one side to the other.

On the last two trucks I've owned, I've had the same problem. The dealer says its "within spec". Ive heard of some BS excuses too, the last one I heard was "well its designed that way because most streets aren't flat, they tend to decline to the right so this helps your ride sit more flat"....I measured 1" difference on my last truck. I could definately tell because the fender gap appeared drastically different.

The G seems to sit pretty even from what i've seen. Maybe you have soft worn out shocks? Have you tried measuring when the car is full of gas vs when its near empty?

Went to mechanic. They checked shocks, coilovers etc, and everything looks good. Nothing is broken. He said it's possible that a spring lost its strength but it's impossible to measure. Apparently the difference is 1/2in but it is noticable. Would you bother changing springs ?

I could had sworn the gas tank was centered under the car.... Unless its like a truck where the tank sits on one side of the frame then that will not make a bit of difference... Gas is liquid and when the car is sitting still it will be evenly distributed.

If its worse with a full tank of gas rather than with a half tank then you can see more weight makes it worse. Check the rubber isolator bushings on the coil springs, maybe one has worn through. open the trunk and try to bounce on the rear of the car. see if the side sitting lower has more bounce to it that the other side. Could possibly be a bad/busted shock. See if the shock has oil leaking out of it....

Impossibe to measure....what? From what you describe it must be obvious it has a weak spring. If you live in SoCal I'd give you my set of sport springs! I'd have the two rear springs changed out to make em even then have it aligned.
Gary

sorry i ment that it's hard to measure strength of a spring. I am very far away from SoCal but thanks though. Stealership wants 190$ for one

if i were you i would get 2 new rear springs to ensure the rear is the same on both sides

idiot

It seemed like this problem went away for a while and now it's back. Very weird. Does anyone know if the car sits on springs or shocks ? ex. If a shock was blown, would the car drop, or are springs holding it. My mechanic says that shocks and springs are good.
Thanks

shocks and struts deal with rebound and dampening, springs hold the car up.