## Does Replacing a Car Engine Reset Mileage?
Replacing a car engine is a major undertaking that requires significant time and expense. Many car owners are curious about whether or not replacing an engine will also reset the car’s mileage. The answer to this question is **no**.
Replacing the engine does not affect the car’s mileage, as the odometer reading is stored in a separate electronic control module (ECM). The ECM is not connected to the engine, so it is not affected by engine replacement.
### Why the Mileage Stays the Same
The mileage on a car is determined by the number of revolutions the wheels have made. This information is stored in the ECM, which is located in the dashboard. When the engine is replaced, the ECM is not affected, so the mileage remains the same.
### The Purpose of Replacing an Engine
Car engines are typically replaced when they fail or become damaged beyond repair. Some of the most common reasons for replacing an engine include:
* **Internal damage:** This can be caused by a number of factors, such as overheating, lack of lubrication, or a catastrophic mechanical failure.
* **External damage:** This can be caused by an accident or other impact.
* **Wear and tear:** Over time, even well-maintained engines will eventually wear out and need to be replaced.
### The Cost of Replacing an Engine
The cost of replacing an engine can vary significantly depending on the make and model of the car, as well as the type of engine that is being replaced. However, it is generally a very expensive repair, costing anywhere from several thousand dollars to over $10,000.
### The Benefits of Replacing an Engine
Replacing an engine can provide a number of benefits, including:
* **Improved performance:** A new engine can provide improved performance over an old, worn-out engine.
* **Increased fuel efficiency:** A new engine can also be more fuel-efficient than an old engine.
* **Reduced emissions:** A new engine can also produce fewer emissions than an old engine.
### Conclusion
Replacing a car engine does not reset the mileage. The mileage is stored in a separate electronic control module (ECM) that is not affected by engine replacement. Replacing an engine is a major undertaking that requires significant time and expense, but it can provide a number of benefits, including improved performance, increased fuel efficiency, and reduced emissions.
