Road salt combined with winter moisture creates ideal conditions for rust. Salt spray directly contacts the undercarriage exhaust system. Waterloo's wet, salty winters accelerate exhaust corrosion significantly compared to dry climates.

Rusted exhaust develops holes that cause power loss, increased fuel consumption, and emissions test failures. Holes allow exhaust gases to escape prematurely, reducing engine efficiency. Early rust repair prevents catastrophic muffler failure.

Minor rust repair costs $100-300. Complete muffler replacement runs $300-800+. Carbon buildup from leaky exhaust can damage catalytic converters ($400-1200+). Early inspection and repair prevent expensive cascading failures.

Inspect annually in September before winter. Listen for unusual rattling or dragging sounds. If your vehicle fails emissions testing, have exhaust inspected immediately. Spring inspection after winter is also recommended.

Minimize exposure through undercarriage washing (removes salt), avoid deep water/slush drives, and address small rust spots immediately before they spread. Protective coatings exist but are temporary. Vigilance catches rust early.