We’ll talk about what it is, how it works, and why it’s important for used car buyers and sellers. We’ll also go over some frequently asked questions too, giving you everything you need to know about the NMR.

What is the National Mileage Register?

The National Mileage Register is a brilliant service managed by HPI. It collects the mileages of vehicles in order to protect consumers from car scams, such as clocking (tampering with the mileage on the odometer) and mileage fraud. This information is then kept in a database, which can be used by anyone – whether you’re a private dealership or buying a used car – to check the mileage of a specific vehicle.

And this is vital info for car buyers, doubly so as you can check a vehicle’s actual mileage on the odometer and compare it with information from the National Mileage Register. If there’s a discrepancy between the two, it could be a sign of mileage fraud and a warning to walk away from the sale.

How does the National Mileage Register work?

The National Mileage Register works by collating information from various legitimate sources. This info is then stored in a database and used by HPI in their vehicle history checks. The National Mileage Register gathers info from:

  • The DVLA
  • V5 documents
  • Manufacturers and dealer groups
  • The BVRLA (British Vehicle Rental and Leasing Association)
  • HPI Check
  • And even car owners

Is the National Mileage Register genuine?

Yes, the National Mileage Register is absolutely genuine. It’s designed to protect consumers from car fraud in the motor trade. Drivers and those selling a car may even receive a National Mileage Register letter, requesting mileage information. Again, this is legitimate, as HPI (the operators of NMR) have an agreement with the DVLA where they can request information on a previous car owner. They’ll only ask for vehicle info and such details are not shared with any other third party.

What does NMR mean on an HPI check?

If you do a detailed car history check with HPI Check, you’ll see the abbreviation NMR. As you may have guessed by now, it stands for the National Mileage Register, which is operated by HPI. It means the HPI Check has used the NMR database to see if there were any discrepancies in the checked vehicle’s mileage. Any discrepancies are then flagged in the car history check, which is the best way to ensure the second-hand car you’re looking to purchase has no mileage issues.

Can you check car mileage online?

Yes, you can easily check car mileage online. There are a number of ways to do it too. First, you can visit Gov.uk to get a free MOT history check, which will also show you the mileage that was recorded at each MOT test.

As mentioned, you can also do a car history check with HPI. It’s inexpensive, it has access to the NMR database for a record of mileage, and it’ll give you lots of additional information too that’ll help build a clear picture of the vehicle’s past. Plus, it’ll tell you if the car has outstanding finance on it and it’ll include a stolen car check as well.

What is a mileage discrepancy?

A mileage discrepancy is where the mileage displayed on the car’s odometer doesn’t match what’s recorded on the National Mileage Register or other records and sources, such as the information recorded at an MOT test. It could be a sign the car is clocked.

No matter what used vehicle you’re looking to buy – whether a Ford Fiesta, a Nissan Leaf, or a Volkswagen Golf – if you spot a mileage discrepancy be sure to proceed with the utmost caution. You’ll want to get evidence that backs up the vehicle’s mileage, whether from the Service History, MOTs, other documentation, or even via previous owners listed on the V5C. If you can’t prove the car’s mileage, or something feels amiss, walk away.

Why have I received a letter from the National Mileage Register?

If you have received a letter from the National Mileage Register, it means a car (or more than one) previously under your ownership requires its mileage history to be confirmed. This will be because a company in the motor trade is looking to buy or sell that car and they’re looking to make sure the mileage is accurate. It’s also to protect car buyers and sellers from mileage fraud.

The letter will direct you to the National Mileage Register website, which you can access using the letter’s 10-digit reference number and the vehicle’s registration number. It’ll then ask a few questions and will only take a few minutes to complete. If you receive a letter from the NMR, it does not instantly mean you or the car is under suspicion of falsifying mileage. It’s more likely a dealership is performing a routine check of the car’s mileage.

Can I change mileage on the National Mileage Register?

To protect car buyers and sellers, the National Mileage Register requires proof to change a vehicle’s mileage. If you believe a car’s previous mileage has been wrongly recorded, you will have to provide written information – such as Service History or an MOT – that proves the reading is wrong. Once supplied with the proof, the NMR will carefully evaluate it and update or change the mileage where appropriate.

What’s the National Mileage Register contact number?

You can contact the National Mileage Register weekdays from 9am-5pm on 0113 222 2035. Alternatively, you can send them an email at mileage@hpi.co.uk.

By keeping a mileage database, the National Mileage Register protects consumers from motor fraud like clocking. The NMR uses various sources, such as the DVLA, and are managed by HPI, pioneers of the vehicle history check. Review a car’s mileage online today via a car history check with HPI. For more on the NMR visit the The National Mileage Register website.

We also work with HPI as our automotive data provider, using their expertise to identify the vehicle’s listed on our site. Why? To provide peace of mind and protection to car buyers. See our History Check to discover more.