Here are a few factors that can influence the lifespan of your exhaust system:

1. Driving Conditions: Frequent short trips, stop-and-go driving, and driving in extreme weather conditions (like salt in winter) can lead to faster deterioration of the exhaust system.
2. Maintenance: Regular maintenance and prompt repairs can extend the life of your exhaust system. For instance, fixing any leaks or rust issues as soon as they’re detected can help prevent further damage.
3. Quality of Parts: Higher-quality exhaust components generally last longer. OEM (Original Equipment Manufacturer) parts or high-quality aftermarket parts can be more durable.
4. Vehicle Type: Some vehicles are designed with more robust exhaust systems than others. For instance, heavy-duty trucks might have more durable exhaust systems compared to standard passenger cars.

If you notice signs of exhaust issues, such as increased noise, reduced fuel efficiency, or unusual vibrations, it’s a good idea to have your exhaust system checked by a mechanic. Early detection and repair can help extend the life of the system.

It’s a good idea to have your car’s exhaust system checked regularly to ensure it’s in good working condition. Here are some guidelines on how often you should check it:

1. Routine Maintenance: During regular vehicle maintenance or oil changes, which are typically done every 3,000 to 7,500 miles (or every 3 to 6 months), ask your mechanic to inspect the exhaust system. Many service centers include a quick visual inspection of the exhaust as part of their routine service.
2. Every 12 Months: At least once a year, have a thorough inspection of your exhaust system to check for signs of wear, rust, or damage.
3. Before Long Trips: If you’re planning a long road trip, it’s wise to have your exhaust system checked beforehand to avoid potential issues during your journey.
4. When Noticed: If you notice any symptoms of exhaust problems, such as unusual noises (like rattling or loud rumbling), reduced fuel efficiency, or a strong smell of exhaust fumes inside the car, get it checked out immediately.

Regular inspections and timely maintenance can help you catch issues early, which can prevent more expensive repairs and ensure your vehicle runs efficiently and safely.