OEM approved resistance spot welders are used every day in bodyshops for controlled panel joining, especially where original vehicle construction needs to be replicated. In my work, I see them used on outer panels, reinforcements and structural repairs where consistent nugget formation matters more than speed alone. The main points I look at are electrode condition, arm reach, material thickness and whether the machine is correctly set up for the steel grade being welded. With modern vehicle bodies, poor fit-up or dirty metal will give trouble very quickly, so the preparation is just as important as the welder itself. A common issue is operators relying on the machine to compensate for bad panel contact or worn tips, which usually leads to weak welds and rework. Used properly, a good spot welder gives repeatable joints and saves time on repair work while keeping the process under control.