[bmwx32015]

After driving a loan car for a couple of days while my own car was serviced, I realized how much my driver's seat is flattened... to the point that at first when I got back on it, I was under impression that the seat was damaged, but it was not. I understand 7 years relatively long period of time to own a car, but I couldn't believe how much different the seat is comparing to a new car seat.

Is there way to fix it without having to install new seat?

I am driving 2015 X3 purchased new.

[pungo]

Not sure comparing a different car seat to yours is apples to apples.
If you have sport seats, they are much firmer to begin with.
Don't know how much you weight, but the heavier you are, the more wear on the seat.
The only thing to cause flattening of the seat is worn out foam, which if replaced will make the seat feel new.
As far as wear goes, age doesn't matter as much as time in the seat.
Does the passenger seat feel the same?
A pic of your flattened seat would help since if the foam is worn it would be sunken in.

[Wgosma]

As mentioned in prior post, Can you sense a significant difference between driver and passenger seat?….that's a good way to judge condition.

Years ago I replaced the Driver seat bottom foam in my E39 5- Series sedan; the car had 150K miles and foam was shot. OEM BMW foam cost $150, I pulled the seat bottom and had upholstery shop swap the leather onto new foam, cost about $50 as I recall. If you're reasonably handy with tools and willing should be reasonably simple DIY

[deyrag]

Not sure if they are worn out or not but in my opinion the seats in my wife's 2011 28i are the most uncomfortable seats of any car I have owned.