I was fixing one of my tires a week ago on my 99 Ford Expedition, and while I had the tire off I notice one of the trailing arms starting to look like it had a lot more than just surface rust. I picked at a little and quickly had a hole big enough to put my thumb clean through both sides of one, and through one side of the other.
So did a little googling and found that it's quite common for these to rust out and need replacing. So I ordered a set ($150) and spent a couple hours cutting off the old bolts and getting the new ones installed today.
At first it gave me a bit of a scare of what could have happened if one of these had broke going down the highway. Then kinda ticked me off that something as important as this wasn't made to better quality and wondered if it should have been a recall. However, I got to thinking, it's 17 years old and it's lasted this long...oh well.