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ASE A4 requires clear understanding of suspension dynamics. Coil springs support vehicle weight but do not absorb or dampen shock energy; instead, they store and release it. Shock absorbers (or struts) dissipate this energy, controlling rebound and compression to ensure stability and comfort. Without functioning shocks, a vehicle would continue bouncing after hitting a bump, leading to poor handling, increased tire wear, and reduced braking effectiveness. Stabilizer bars reduce body roll during cornering but do not absorb shocks. Control arms connect suspension components and maintain wheel alignment. Diagnosing worn shocks often involves the "bounce test" or inspecting for leaks. ASE emphasizes recognizing ride quality symptoms linked to shocks versus springs, ensuring technicians can pinpoint which suspension part affects handling and comfort.