Which component is mainly focused on when checking suspension systems?

When inspecting suspension systems, the primary focus is on air bags. These components are crucial because they are responsible for maintaining the vehicle's ride height and absorbing road shocks, which greatly affects handling and stability. Properly functioning air bags are essential for ensuring that the vehicle can carry its load effectively while providing a smooth ride. Inspecting them involves checking for any signs of wear or damage, leaks, and ensuring that they maintain proper pressure.

In contrast, brake chambers are associated with the braking system rather than suspension. Pintle hooks are part of the towing setup for trailers, not related to suspension systems. Exhaust pipes are components of the vehicle's exhaust system and do not influence the suspension's performance. Therefore, the focus on air bags during suspension inspection is critical for the overall safety and functionality of the vehicle.