Mileage Correction Service Why Do People Use Them?

Do you ever wonder why people use mileage correction services to alter the mileage on their vehicles?

Mileage correction services have been around for a long time, but they are usually perceived to only be used for fraudulent activity. In order to understand why people use them, we need first to know what kinds of mileage adjustment tools exist: there’s more than one type out on the market.

Differences between mileage correction services and tools

If you search the web for mileage correction services, you will find multiple companies and devices with various names. There are over 150 registered companies in the UK that offer this service.

Mileage calibration tools and speedometer rewinds tools

There are multiple Mileage Calibration and Odometer Rewind Tools, but usually, they serve the same purpose. These gadgets are also sometimes known as Speedometer Correction Tool, Can-Filter, Odometer Correction tool, etc. Despite the variety of different names, they all serve the same purpose to turn back the mileage on your vehicle and can be used interchangeably. These mileage correction tools are useful to correct the mileage that is displayed on the speedometer. However, they cannot remove the mileage entirely from the vehicle’s memory as it is usually stored in multiple places and not just the speedo.

Mileage Stoppers / Blockers

Another type of speedometer correction tool is Mileage Stopper / Blocker (as we call it). This device is significantly different from the mileage rewind tools, as this is designed to stop the mileage increasing on the vehicle by filtering the mileage data and blocking the signal through the canbus system to the other ECU modules.

As mileage correction tools can’t access ECU modules, they usually leave information within modules of the vehicle, that still displays the original mileage, using diagnostic machines it is possible to find this data and potentially devalue the price of your vehicle if it’s found out. Also sometimes when using the mileage correction tool they require you to cut wires or even solder onto microprocessing chips on the back of your speedometer, leaving tell-tale signs that it has been interfered with.

Mileage Stoppers / Blockers are different, they are simple plug-and-play modules that require no cutting or joining of wires and no soldering. They are made using genuine dealer plugs and fit perfectly with the original.

When the stoppers/blockers are activated they simply filter out the mileage data from the speedo and block any further data being transferred to all ECU modules within the vehicle. This makes them 100% untraceable to any diagnostic equipment including dealer-specific equipment.

When the blocker is removed it will still show the same mileage as it did when the blocker was fitted.

On most vehicles, we offer multiple modes to choose from including 10% so that only 10 in every 100  miles is recorded, 25% so that only 25 in every 100 miles is recorded, 50% so that only 50 in every 100 miles is recorded and simply on so that 100% is not recorded and off so that everything is recorded as usual.

Mileage blockers can be switched between modes as you choose, even when in motion, and be fully de-activated when going in for MOT/Servicing. 

The chosen settings are saved each time the vehicle is switched off, so you are not required to re-set it for the next time you use your vehicle.

The speedometer and all the other assistance systems work as usual and in most cases will not show any error codes.

The main purpose of mileage correction services and tools

As time goes on it is possible for the vehicle to lose its calibration settings, this in turn gives a false reading of the mileage the vehicle has actually covered. Another reason is to compensate for the changes in tyre size. when your vehicle is purchased new, it will come with a standard sized wheel (A common size is 205 55 16″) the vehicles speedo is calibrated to that specifically sized wheel, if you change the width or diameter of the wheel this will calibration would then be out of sync and even worn-out tires will affect the mileage significantly.

Changing to non-standard tyre size

Changing tyres is an important improvement to the vehicle not only to enhance its appearance but also to make it more convenient for off-road driving. Similarly, some people prefer smaller tire sizes and install them without any thought about the digits displayed on the speedometer. However, these changes significantly affect the mileage of the vehicle and can mislead people. For instance, if a standard size for your vehicle is 16-inch and you use 15-inch tyres, the speedometer will display 100,000 miles when you have only traveled approximately 90,000 miles. As you can see the changes are quite noticeable and can become irreversible as this data is recorded in multiple modules of the vehicle. With a mileage blocker, this could be prevented as it is possible to set adjust the blocker to record 10% less.

Worn tyres

You may be surprised to hear this, but worn-out tyres can also affect the mileage of your car. It can cause significant differences in the long run and will distort the mileage of your car. It is always advisable to avoid having worn-out tyres as it will not only affect the distance recorded in your vehicle but could also put you  in danger of an accident.

Speedometer calibration is vital to deal with such inconsistencies. As we have already discussed, Mileage Stopper Tools have different modes. With this module, you can choose the percent of the overall traveled distance that you would like to record, in order to avoid excess mileage saved in the memory of your vehicle. For instance, there are modes to record only 10%, 20% or different amounts of mileage. The modes differ for different makers and it is advisable to check the description of your specific car.

Testing the performance of your car

The manufacturers usually advertise the newly produced cars with performance statistics that sometimes might seem unbelievable. Hence, it is good to check the reliability of these numbers as soon as you purchase a new Car. Similarly, some people prefer testing their vehicle to make sure that everything works as smoothly as it has to.

The mileage is usually used to determine the condition of the vehicle and it will be good if you could make sure that you are cautious of this number. If you would like to test your car on a dynamometer or in any other controlled environment, you can use a mileage correction to avoid recording unnecessary mileage. The most convenient product, in this case, is a mileage blocker module as you can stop the mileage during the testing period and continue recording as soon as you are done testing.

Changing the mileage after an engine replacement

Many people argue whether the mileage truly reflects the condition of the vehicle or not. There are multiple factors that affect the lifespan of the vehicle such as servicing or driving conditions and it would be unjustified if this was solely based on the mileage. Some owners tend to change the parts constantly and take care of the vehicle better than the other owners. Hence, it would be fair to say that mileage is solely one of the criteria and only has a meaning when taken into consideration with other factors.

The engine is the main part of the vehicle, it is well known that some vehicles have replacement engines due to mechanical faults or failure. If the engine is replaced it is not uncommon for the speedo to be calibrated to the new engine’s true mileage. (this is not illegal but we would recommend you have the correct documentation when trying to sell the vehicle to back you up) 

Whether this is ethical or not will be a question of debate for a long time. However, as we have already mentioned such behavior would be understandable as this vehicle will be in much better condition than those with the same mileage.

The mileage blocker modules are sometimes used to stop mileage after such modifications. This will allow you to record a certain amount of mileage or don’t record it at all.

Testing new gadgets on your car

If you are one of those petrol heads who admires testing the innovative tools on your vehicle, you will know the feeling of enhancing your vehicle. Being able to install additional modules gives an opportunity to add more features to your vehicle. Hence, many people are inclined to install the speedometer calibration modules for the same purpose. As we have already mentioned, this tool is a must if you consider testing multiple gadgets on your vehicle. Blocking mileage while testing these tools will allow you to avoid recording unnecessary mileage in the memory of your vehicle.

Correcting mileage before selling a car

As the headline suggests, such modules are frequently used to rewind back mileage before selling the car. Such behavior is illegal and can lead to serious legal consequences. Despite such consequences, a large number of people use speedometer Correction tools.

Before you jump to the conclusions and judge the people that use mileage correction tools, it is necessary to consider what triggers their behavior. Misconceptions, that we have already mentioned, sometimes put some people in unfair conditions. There can be two different cars that have the same mileage, but they can be in entirely different conditions. However, people strongly believe in stereotypes related to mileage and don’t take into account the other factors that are similarly important. Even though the usage of the Speedometer Correction tool is unfair, it is equally unfair to offer the owners of these cars the same prices.

Premium charges of insurance companies

The insurance companies use the mileage as one of the main criteria for determining the price the owner of the car has to pay. This again is no reliable source of information to determine the overall condition of the vehicle. Hence, it is understandable why insurance companies rely solely on the distance traveled.


Even though some people think that The Speedometer Calibration modules are used solely for deceiving purposes, there are multiple other functions that they might be used for. We strongly recommend to use Mileage Stopper Tools solely for ethical purposes that don’t go against the law by any means.
If you would like to purchase this module, make sure that you purchase a premium quality product. This will give you the opportunity to test the performance of your vehicle and get all the available functions that we have mentioned above.