To repair car struts, first lift the vehicle and remove the wheels. Locate the strut assembly and unbolt it from the steering knuckle and strut tower. Carefully remove the strut. If replacing just the strut, use a spring compressor to safely remove the coil spring. Install the new strut and reassemble in reverse order. Ensure all bolts are torqued to specifications. Check for alignment issues after replacement, as new struts can affect suspension geometry. If you're unsure or lack proper tools, consult a mechanic. Replacing worn struts improves ride comfort, handling, and overall vehicle safety.