You can inspect rubber bushings yourself by lifting the vehicle and performing both visual and manual checks, focusing on the condition of the rubber and testing component clearances.
Preparation
Park the vehicle on a level surface, engage the handbrake, and use a jack to lift the wheels, ensuring safe support (a lift or stand is recommended).
Prepare a flashlight and gloves for clear inspection of chassis components.
Visual Inspection
Observe the rubber surface: Inspect the bushings of the control arms, stabilizer bars, lower control arms, etc. If cracks, bulges, hardening, splitting, or separation of the rubber from the metal bracket are found, it indicates aging and damage.
Note color changes: Aged rubber often darkens, loses elasticity, and may even develop powdery cracks.
Manual Inspection
Shake the suspension components: Hold the lower control arm or linkage and shake it vigorously up, down, left, and right. If you feel significant looseness or play, the bushing may be faulty.
Check the ball joint fit: Pull down the triangular arm, pulling and releasing repeatedly. If you feel a "click" or the spring is not tight, it indicates that the ball joint or bushing is severely worn.
Use the wheel to aid in judgment: Removing the tire makes it easier to observe and check for abnormal friction marks caused by bushing misalignment.