2002-2005 Thunderbird Rear Coil Spring – New Product! If you’ve been trying to OEM rear coil spring replacements for your 2002-2005 Ford Thunderbird, you probably already know they are no longer available from Ford or Ford dealers. They have been out of production for a number of years. Thanks to the diligent effort of a fellow Thunderbird owner, we now have a source for this hard-to-find replacement part. These springs are custom manufactured to order for us by a small American company that specializes in obsolete and specialty automotive and truck springs. Price is for EACH rear spring, so if you need to replace yours, be sure to order two. The front coil spring is a different part and is not interchangeable with this part. In stock and ready to ship!