Yes. You generally buy two new shoes or socks at the same time. Matched struts provide balanced ride quality and equal response to bumps in the road. The only time you would replace one strut is when one is damaged in a crash and they were both relatively new. Same applies to the very rare failure of one strut when the car is still in warranty. When they are that new, a single new strut from the manufacturer will still match the other strut.
At the mileage you listed it is about time to expect to find worn struts that are not damping the road bumps for best comfort and handling. By the time the car gets to be around eight to ten years old, a conscientious mechanic will recommend new struts that already have new coil springs installed. That will restore the suspension ride height which is critical for best tire wear along with maintaining proper alignment.
Monday, June 6th, 2016 AT 8:14 PM