1. Raise the car.
2. Check the tightness of the mounting clamps.
3. Light a lamp and inspect the exhaust system for holes, rusted parts, and places of harmful contact.
4. Replace severely crushed (crumpled) pipelines.
5. Check the rubber mounts for porosity by rotating and stretching and replace if necessary.
6. Check the electrical connection and tight fit of the oxygen sensor (lambda probe).
7. Tighten all bolts and nuts on flange connections with a torque of 20 Nm.
8. Lower the car.