The average lifespan of a ball joint can vary widely, but many last anywhere from around 70,000 to well over 150,000 miles, depending on the vehicle and driving conditions. Ball joints on heavier vehicles or those driven on rough roads often wear out sooner. Load‑bearing ball joints, which carry the weight of the vehicle, typically fail before non‑load‑bearing joints. Good lubrication and intact rubber boots help them last longer by keeping dirt and moisture out. Since there is no fixed mileage for replacement, regular inspections during alignments, tire rotations, or brake jobs are vital for safety. Detecting wear early helps you stay safe and confident on the road.