It may be time to trade it in at Target. They're offering a pretty cool deal:
Target says "April 22 through May 5, bring any unwanted car seats to your local Target store and receive a coupon for 20 percent off a new car seat, booster seat, car seat base, travel system or stroller from our stores or full online assortment."
So what happens to the old seats? "We’ll get the old car seats to our partners at Waste Management, who will recycle the parts to create new things like grocery carts, plastic buckets and construction materials. Cool, huh?"