For most cars, the average lifespan is around 200,000 miles. However, some cars can easily exceed this mileage, while others may start to experience problems much sooner. For example, luxury cars and sports cars are typically built to higher standards and can often last for 300,000 miles or more. On the other hand, economy cars and compact cars may start to have problems after 150,000 miles or so.
The driving conditions can also have a significant impact on a car's mileage. Cars that are driven in stop-and-go traffic or in harsh weather conditions will likely experience more wear and tear than cars that are driven in rural areas or in mild climates.
Finally, the level of maintenance that has been performed on a car is also important. Cars that have been regularly serviced and maintained are more likely to last longer than cars that have been neglected.
In general, it is a good idea to start thinking about replacing your car when it reaches 200,000 miles. However, this number is just a guideline and there are many cars that can still be driven safely and reliably after this mileage. If you are concerned about the mileage on your car, it is always a good idea to have it inspected by a qualified mechanic.