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Built-in car navigation: how factory systems receive new maps

A navigation screen built into a car belongs to the carmaker’s system, even when the map data inside it comes from a supplier such as HERE. That is why factory navigation follows the carmaker’s rules: a dealer visit, the carmaker’s own update program with a card or USB drive, or the car’s own mobile connection.

Checked against HERE’s and Hyundai’s published pages, October 2026.

Illustration: a car dashboard with a built-in navigation screen, and the three ways a new map can reach it: a memory card, a USB drive and a mobile signal
Illustration: a dashboard with a built-in navigation screen and three ways a map can reach it, a memory card, a USB drive and a mobile signal. No carmaker’s system or screen is shown.
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Built-in, factory, in-dash, embedded or sat nav: the names vary, the mechanism does not. A navigation screen built into a dashboard is the carmaker’s system, even when the map inside it comes from a supplier. HERE, one of the largest of those suppliers, says so plainly: the car’s maker, not HERE, controls whether, when and how a factory system receives a new map.

Who decides when a car’s map changes

HERE builds and supplies map data; its own guidance lists what the vehicle manufacturer controls: whether navigation is switched on and subscribed, which map releases are available and how they are delivered, entitlements tied to the vehicle identification number (VIN), and the configuration of the system itself.

HERE adds that the arrangement confuses many drivers, because HERE’s map data and technology are inside so many vehicles. The services around that data are run by the carmaker, its dealers or the update portals the carmaker uses, rather than by HERE directly.

Three routes into a factory system

Factory systems receive maps by one of three routes, and a given model may use only one of them.

Three routes into a factory system

Which one applies is the carmaker’s decision, model by model.

At a dealer

HERE notes that some vehicles can be brought up to date only through dealer systems, which identify the car by its VIN.

  • WhoThe carmaker’s dealer
  • KeyVIN

By card or USB drive

The carmaker publishes an update program for a computer; the program prepares a memory card or USB drive, which the car then reads.

  • WhoThe owner, with the carmaker’s program
  • MediaSD card or USB drive

Over the air

Cars with a built-in mobile connection can receive map data through it, on the carmaker’s schedule.

  • WhoThe carmaker
  • LinkThe car’s own connection

One carmaker’s card-and-drive route

Hyundai’s update site shows the card-and-drive route in detail. Its notes say releases are prepared with Hyundai’s Navigation Updater program, published on that site, onto either an SD card of 16 or 32 GB or a USB drive formatted as exFAT, depending on the system in the car. The file is prepared on a personal computer; tablets and phones cannot do it.

The same notes state that the vehicle stays running while the release goes on, so the battery holds its charge, and that the change is one-way: the previous software version cannot be restored afterward.

Stores run for carmakers

Some carmakers sell releases through a store that the map supplier runs on their behalf. HERE operates one at here.navigation.com, run by HERE North America, LLC of Chicago, which describes itself on that site as an independent company. Its list of vehicle brands includes Acura, Ford, Honda, Nissan, Subaru and Volkswagen, among many others.

Such a store can carry a carmaker’s name at the front of its address while the registrable domain belongs to the supplier. The dependable way to reach the right store is the link on the carmaker’s own website, not a search result.

Genuine addresses, and the imitations

Look-alike sites are spotted by their addresses. For factory navigation the genuine addresses are the carmaker’s own site, the dealer the carmaker lists, and any store that site links to. Two examples from this page:

https://update.hyundai.com/

  • Subdomain: chosen by the carmaker for its update site.
  • Registrable domain: the carmaker’s own.
  • Path: country and language sections follow here.
  • https://update.hyundai.com/Hyundai’s update site, which publishes its Navigation Updater.
  • https://here.navigation.com/HERE’s map update store; navigation.com is HERE’s domain.
  • https://car-map-updates.example/hyundai/A carmaker’s name in the path of an unrelated site.
  • https://hyundai.navi-store.example/A carmaker’s name as a subdomain of a domain neither it nor its supplier owns.

  • Maps for “all makes”

    A one-size card or drive sold as fitting any car cannot be real: a factory system reads only releases built for it by its maker.

  • VIN plus payment

    A form asking for a VIN and a card number on a site the carmaker’s own website does not link to.

  • Dealer-free promises by phone

    A number that promises to update factory navigation without the carmaker, its dealer or its store.

  • The remote session

    A request to control the computer while the card or drive is being prepared.

Pages cited in this profile

Questions about factory navigation maps

Does HERE sell map updates for every car?

HERE says the vehicle manufacturer controls which releases are available and how they are delivered. Its store at here.navigation.com lists the brands it serves.

Why does a carmaker ask for the VIN?

The VIN identifies the exact system in one car, so the carmaker or its store can match a release to it.

Can a factory navigation release be reversed?

Hyundai’s notes state that its releases cannot be rolled back once applied; other carmakers publish their own terms.

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