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Safe drivingQuestion 277 of 310

Why is a leaky muffler dangerous, besides noise?

  1. It can cause carbon monoxide poisoning
  2. It can lock the brakes
  3. It can make the tires wear fast
  4. It can flood the engine
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Correct answer: It can cause carbon monoxide poisoning

Exhaust gas with carbon monoxide can leak into the vehicle through a bad muffler.

Source: Driver's Handbook (Manitoba Public Insurance, February 2026), Muffler, page 93

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Questions last reviewed: 18 October 2026