Hello! Typically, the vehicle manufacturer’s maintenance schedule does not include a suggested interval for strut replacement. Exactly when the struts will require service depends on many different factors, such as your driving habits, where you drive and the initial quality of the struts. For common symptoms associated with bad struts, check out our article found here: https://www.carparts.com/blog/shock-and-strut-mount/ If you’re still uncertain as to whether your struts require replacement, it’s a good idea to have them checked by a professional.