What are Mileage Blockers?

When it comes to vehicle mileage, the odometer often speaks volumes. But did you know there’s a device that can actually pause or stop your car’s mileage recording? These devices, known as mileage blockers or mileage freezers, are increasingly common—but also misunderstood.

At Super Kilometer Filter UK, we’re here to separate fact from fiction. In this comprehensive guide, we’ll explain what mileage blockers are, how they work, their legal and ethical applications, and why—when used properly—they can be a legitimate tool for drivers in the UK.

What Is a Mileage Blocker?

A mileage blocker is a small, intelligent module designed to halt odometer recordings while your vehicle is in motion. Installed behind your dashboard, it interrupts the signal between the car’s speed sensors and the electronic odometer system—effectively freezing the displayed mileage.

Unlike odometer rollback tools, which alter stored mileage, the blockers simply prevent new miles from being added, preserving the real mileage that existed prior to activation

How Do Mileage Blockers Work?

Most modern vehicles rely on the CAN-Bus system, a network that synchronises vehicle data among control modules like ECU, BCM, ABS, and the instrument cluster. Mileage is often stored across multiple locations—making tampering with one source traceable.

Mileage blockers cleverly intercept mileage signals before they reach any control module. The result? Mileage doesn’t increase, and no record of that time is stored anywhere in the vehicle’s system—making it virtually 100% untraceable.

Are Mileage Blockers Legal in the UK?

Yes—with caveats.

• Buying or installing a blocker is legal in the UK.

• However, using one to mislead buyers, during an MOT, or in service records is illegal and this constitutes as odometer fraud under the Consumer Protection from Unfair Trading Regulations 2008.

  Legitimate Uses of Mileage Blockers

  When used responsibly—mileage blockers are legal and ethical. Common legitimate applications include:

  • Track days, dyno testing, and off-road events, when the miles aren’t relevant and not being used on a public highway.

  • Diagnostic or repair purposes, where you want to protect the recorded mileage during non-driving operations.

  Always ensure the device is removed or disclosed if selling the vehicle, to maintain transparency and legal compliance.

Benefits of Using Super Kilometer Filter’s Mileage Blocker

What sets our products apart?

1. Untraceable Functionality – No mileage is recorded or altered in any ECU module.

2. CAN-Bus Safe – Designed for modern vehicle networks, with no interference to speedometer or safety systems.

3. Mobile App Control – Adjust modes or toggle the device using our tailored smartphone app, without physically interacting with the dashboard.

4. Easy Installation – Plug-and-play setup using original manufacturer plugs, no soldering or modifications needed.

5. Premium Quality – Built from automotive-grade parts, thoroughly tested for performance and reliability.

What About Detecting Mileage Blockers?

Mileage blockers from Super Kilometer Filter UK are engineered to be extremely difficult to detect. Diagnostic tool even including dealer tools, can’t identify missing mileage because no data is altered or erased.

Used low-grade devices from companies like smelecom or carcode sometimes cause mileage “jumps” or discrepancies, which can trigger red flags. Our devices avoid this by maintaining consistency across all systems.

Comparison Table: Blocker vs. Correction Tool