During an inspection, what signifies that there might be a leak in the exhaust system?

In the context of inspecting the exhaust system, the presence of cracks in the housing is a significant indicator that there may be a leak. Cracks can allow exhaust gases to escape, which can lead to poor engine performance, increased emissions, and can pose a safety hazard due to the potential for carbon monoxide buildup in the vehicle's cabin.

While a secure and stable connection is a good sign indicating that components are properly fitted together and there's no risk of leakage from disconnects or loose fittings, it does not specifically signify a problem like cracks do. Similarly, having no visible signs of wear is generally a positive aspect but does not point to any specific issues that could lead to leaks. The burst sign (referring to a warning or indication of malfunction) is less direct compared to observing physical structural issues like cracks. Thus, identifying cracks in the exhaust housing directly suggests that a leak is possible, making it a critical aspect to monitor during inspections.