While beneath the vehicle, check the security of the exhaust’s rubber hangers, as well as inspecting the system for leaks and serious corrosion. Broken mounts tend to be obvious and are inexpensive to replace. Ensure that any sensor wiring on either the exhaust front pipe, catalyser, Adblue system (on certain Euro VI diesels) or diesel particulate filter (DPF) is undamaged.
Check the condition of driveshaft gaiters. While a torn gaiter causes CV grease to be splattered onto surrounding components, look closely for advanced perishing. Deep cracks indicate that replacement will be due soon. Do not forget to check the inboard joints’ gaiters. Some driveshafts have support bearings; check them for soundness and that they are mounted securely.