It's not automatically bad. Many cars are designed to last well beyond 100,000 miles, and with proper maintenance, can run reliably for hundreds of thousands more. Think of it like human mileage – some people age gracefully, others don't, and it all depends on how they've been cared for.
Factors that matter more than mileage:
* Maintenance records: A meticulously maintained car with regular oil changes, timely repairs, and adherence to manufacturer's recommendations can easily surpass 100,000 miles with minimal problems. This is the single most important factor.
* Make and model: Some makes and models are known for their reliability and longevity, while others have more common issues. Research the specific car's reputation for reliability.
* Driving conditions: Harsh driving conditions (extreme temperatures, off-roading, constant stop-and-go traffic) will wear a car down faster than gentler driving.
* Previous owner(s): How the previous owner(s) treated the car significantly impacts its condition.
Signs of potential problems in a high-mileage car:
* Excessive wear and tear on tires, brakes, and suspension.
* Leaks (oil, coolant, transmission fluid).
* Unusual noises from the engine or transmission.
* Poor fuel economy.
* Check engine light is on.
In short: 100,000 miles isn't a magic number. A thorough inspection by a mechanic is crucial before purchasing any used car, especially one with high mileage. The inspection should focus on the car's overall condition and mechanical soundness, rather than solely on the odometer reading.
