Periodic preventive maintenance is the key for the cars long life Car care. After a Tune-up, Trans service, Wheel balancing you will feel the difference in performance.
Similarly shocks, motor mounts, front end components all have a job to do. These come under a 30,000 mi svc check up 30K MI SVC 60-90 kmi maintenance service 60-90kmisvc. A 12 point inspection during oil change gives a chance for a check up.

The newer cars have an ECM which like a PC get their inputs from sensors such as coolant temp sensor, oxygen sensor, Maf sensor, Throttle position sensor to name a few. These sensors loose their optimum values with age due to heat and wear. Which need to be replaced in order to rejuvenate the system.

Uneven tire wear indicates a need for wheel alignment due to worn front end parts or just a wheel alignment. A brake squeal which indicates worn brake pads. When ignored the chances for an accident, break down or related component wear is most probable. Which will add up to the cost and loss of time and inconvenience.