Where Do You Put a Tracker on a Car? How Fleet Trackers Should Be Fitted

Ask online where to put a tracker on a car and you’ll get a list: under the car, in the glovebox, in the boot, inside the bumper. Most of those lists are written for someone hiding one tracker on one car. On a fleet, the question is different. You want every vehicle visible every day, you want the tracker to survive a thief who goes looking for it, and you want a fitting you can repeat across 30 cars without it becoming predictable.

Here’s how installers actually decide where a fleet tracker goes, and what to ask before yours are fitted.

The short answer

On most fleet vehicles, the tracker should be hardwired and fitted out of sight behind interior trim, close to a constant power supply, in a spot where the GPS and mobile signal can still get through. On high-theft vehicles, it shouldn’t live in the OBD port, and it’s worth adding a second, battery-powered unit somewhere else as a backup.

What a good tracker location needs

Every fitting is a trade-off between five things.

Signal. A tracker needs to see GPS satellites and connect to the mobile network. Glass and plastic let signal through. Metal blocks it. That rules out spots buried under the metal floor of the boot or wrapped in the vehicle’s structure, however well hidden they are.

Power. A hardwired tracker takes a permanent feed plus an ignition feed, so it reports all the time and knows when the engine is running. That pulls it towards the dashboard and wiring looms, where an installer can make a tidy, reliable connection.

Concealment. A thief who finds the tracker in under a minute can remove it in under a minute. The fitting needs to be out of sight and not somewhere anyone would look first.

Protection. Heat, water and vibration kill trackers. Anywhere near the exhaust, under the car or behind a wheel arch is asking for trouble on a vehicle doing 30,000 miles a year.

Serviceability. The installer, and only the installer, needs to be able to find it again for a swap, a fault or when the vehicle leaves the fleet.

On a car or van, the spot that balances all five is almost always somewhere behind the dashboard or interior trim. That’s why it’s where most professional installers end up.

Why the OBD port isn’t enough on its own

Plug-in OBD trackers are popular because they take seconds to fit and need no wiring. For low-risk vans where you mainly want journeys, mileage and driver behaviour, they do the job.

The problem is that everyone knows where the OBD port is. It’s usually under the steering wheel, and a driver who doesn’t want to be tracked, or a thief who’s just got in, can pull the unit out in seconds. An unplug alert tells you it happened, but you’ve still lost sight of the vehicle.

For taxis, PCO cars, rental stock and anything a thief would want, fit a hardwired unit instead or as well. Our OBD tracker guide goes into where they fit well and where they don’t.

Don’t fit every vehicle the same way

On a fleet of identical cars, a predictable fitting is a weak fitting. If a thief finds the tracker in one of your Toyota Corollas, they now know where it is in all of them.

A good installer varies the location from vehicle to vehicle within the safe options for that model. Ask about this before you book. Then keep a private record of where each unit went against the vehicle’s registration or VIN, so you’re not stripping trim to find it when the car is sold or the unit needs replacing.

When to fit two devices

A single tracker is a single point of failure. The setup most high-risk fleets settle on is:

• A hardwired tracker as the main device, for live location, journeys and alerts
• A small battery-powered tracker hidden elsewhere in the vehicle as a backup, which keeps reporting if the main unit is found and removed
• An immobiliser, so the vehicle can’t be driven away even if both trackers are dealt with

Our OBD vs hardwired vs battery trackers guide compares the three types side by side.

Or skip the hardware

For a lot of newer vehicles, you don’t need to fit anything at all. Many cars built from 2016 onwards already generate location data that digital tracking can use, with nothing to install, hide or wire in. A common setup is digital tracking across most of the fleet, with hardwired trackers only on older vehicles and the ones most at risk of theft.

Tell your drivers

However well hidden the tracker is, the drivers shouldn’t be in the dark about it. UK data protection rules and the ICO’s guidance on monitoring workers expect employers to be open about tracking company vehicles and why they do it. Put it in your vehicle policy, explain what’s tracked and when, and you’re on much safer ground if the data is ever used in a dispute. Hidden from thieves is the goal. Hidden from staff isn’t.

Frequently asked questions

Where is the best place to put a tracker on a car? For a fleet vehicle, hardwired behind the dashboard or interior trim, near a constant power supply and where the GPS signal can still get through. Avoid metal-enclosed spots, anywhere exposed under the car, and the OBD port on high-theft vehicles.

Can a tracker go under the car? It can, using a magnetic battery unit, but it’s a poor choice for a fleet. It’s exposed to water, heat and road debris, and it can be knocked off or easily found.

Will a tracker work if it’s hidden inside the car? Yes, if it’s behind plastic or near glass. Metal blocks the signal, so a good installer picks a spot that hides the unit without boxing it in.

How long does it take to fit a hardwired tracker? Typically 30 to 45 minutes per vehicle with a professional installer. Our hardwired tracker guide covers what to expect across a fleet.

Do I have to tell drivers their vehicle has a tracker? For employees, you should. UK data protection guidance expects employers to be transparent about monitoring, and a clear vehicle policy protects you if tracking data is ever needed in a dispute.

Planning a rollout and not sure what each vehicle needs? Talk to Traknova and we’ll help you work out where hardware is worth fitting and where digital tracking will do.