Axles 2003 Passat station wagon



I bought my car in 2005 with 28K mi. I’ve had to replace the axles twice since then. This last time the axles were under the mechanix warranty, but we’re still mystified. I’m a Gramma who only drives on the freeway & city streets - no off road. I don’t bounce on or off of curbs or parking lot barriers. Has anyone else had this reoccurring problem &/or any suggestion?