When replacing worn shocks absorbers, you can either replace the entire strut assembly or simply replace solely the shock.
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A Step-by-Step Guide on Struts Replacement

Replace struts yourself and save $300 ...
On many vehicles with strut-type suspension designs, the front struts (which include the springs and shock absorbers) are mounted with bearings or bearing plates that serve as the upper pivot points ...
Replacing your own struts and shocks is a job that requires mid-level automotive repair skills. Most moderately experienced home mechanics and enthusiasts should be able to handle the job with ...