Understanding Mileage Blockers: Benefits, Differences, and Legality


Mileage blockers, also known as mileage stoppers, odometer stoppers, kilometer stoppers, can filters, or speed blockers, are specialized tools designed to prevent the recording of distance or mileage in a vehicle’s memory while it is in motion. This article aims to provide a comprehensive understanding of mileage blockers, their differences from mileage correction tools, their legality, and the importance of considering mileage when purchasing a car.

What is a Mileage Blocker?

A mileage blocker is a compact microcomputer with intelligent software that can interface with a vehicle’s systems and manipulate odometer data. Once properly installed, this device effectively halts the counting of distance traveled by the vehicle. This tool works through the Can-Bus system, ensuring that mileage is not recorded in any control units, thus protecting the data from being traced or accessed.

Distinguishing Mileage Blockers from Mileage Correction Tools:

Mileage correction tools, often referred to as odometer correction tools, speedometer correction tools, or mileage rollback devices, are designed to modify the displayed mileage on a vehicle’s speedometer. These tools change the digits visible on the dashboard but can be relatively easily detected. In contrast, mileage blockers prevent the recording of mileage in the vehicle’s systems, providing a more discreet and untraceable solution.

Legal Considerations:

The use of mileage blockers raises legal concerns. While mileage is a significant factor for both car buyers and manufacturers, using devices that reset, roll back, or manipulate recorded mileage is generally illegal. The only legal and ethical option is to opt for a mileage blocker. However, it’s essential to note that these devices are typically intended for testing or off-road purposes. Using mileage blockers on public roads is considered illegal in many jurisdictions.

The Importance of Mileage in Car Purchases:

Mileage plays a substantial role in the decision-making process when buying a car. Lower mileage figures are often associated with better maintenance and higher resale value. However, the importance of mileage varies depending on factors such as driving habits, geographic location, and overall vehicle condition. Putting a significant number of kilometers on a car does not necessarily indicate poor value, as vehicles are meant to be driven and maintained.


Mileage blockers serve as a tool to prevent the recording of mileage in a vehicle’s memory, protecting users’ data from tracing. Differentiating them from mileage correction tools is essential, as the latter modify displayed digits but are more easily detectable. While mileage is a significant consideration when purchasing a car, it’s essential to recognize that well-maintained vehicles can still have high mileage and offer reliable performance. However, it’s crucial to adhere to legal and ethical standards when using such devices, ensuring they are only employed for testing or off-road purposes.

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