In contrast, a well-maintained vehicle's leaf springs can last well over 100,000 miles. On average, a set of leaf springs might last about 200,000 miles. This number can range widely from case to case — it's hard to say how long your leaf springs will last in your unique situation. Keep your eyes and ears peeled for symptoms of wear and tear. Rather than strictly sticking to a maintenance schedule, watch for visible signs of when to repair leaf springs as well. Learn how to tell if they're broken, worn, loosened or dirty.