Customers hold high standards for vehicle anti-rattle performance not only on brand-new vehicles but also after high-mileage operation. Accordingly, the development of full-vehicle durability anti-rattle performance has grown increasingly important year by year. Comprehensive and systematic bench durability combined with rattle testing for complete vehicles represents the most efficient development method for durability-related abnormal noises. Full-scale rattle evaluations carried out at key mileage intervals throughout durability testing can effectively identify rattle defects emerging after aging, helping optimize the vehicle’s long-term anti-rattle performance. Besides, conducting post-durability rattle assessments on other aged test vehicles — including detecting durability-induced rattles and verifying corrective improvements — is another effective approach to enhance anti-rattle performance under high-mileage conditions.