How to Find a GPS Tracker on Your Car
To find a GPS tracker on your car, search the places they are realistically hidden — the undercarriage and wheel wells outside, the OBD-II port and under the seats inside — and sweep with an RF detector to catch any tracker that is actively transmitting. Most consumer trackers are small magnetic boxes stuck to metal underneath the car or plugged into the diagnostic port, so a methodical physical search finds the majority, and a detector adds a second layer for the ones transmitting a live signal.
This guide covers where to look, how to search each area, the different tracker types and what to do if you find one.
Where are GPS trackers hidden on a car?
Trackers go where they are out of sight, easy to fit, and have a clear enough view of the sky to get a signal. In practice that means a predictable set of places.
Outside the car, the undercarriage is the most common: magnetic trackers clamp to any metal surface under the chassis, inside the wheel wells above and behind the tyres, behind the bumpers front and rear, and tucked into the gap under the boot or bonnet. Inside the car, the single most common spot is the OBD-II port — the diagnostic socket under the dashboard near the steering column — because a tracker plugged in there draws power continuously and is hidden from casual view. Others are hidden under seats, beneath floor mats, inside the glovebox or centre console, behind interior trim panels, or in the boot.
The pattern: anywhere magnetic and metal underneath, anywhere powered and concealed inside.
How to search your car, step by step
Work the outside first, then the inside, the same way each time.
Undercarriage and exterior. Use a torch and, ideally, a telescopic inspection mirror or a phone on a stick to see up into the wheel wells and along the chassis. Run your hand around the inside of each wheel arch and along reachable parts of the undercarriage, feeling for a box or anything held by magnets that does not belong. Check behind both bumpers and under the lips of the bonnet and boot. Magnetic trackers are usually obvious once you actually look — they are add-on boxes, not factory parts.
Inside the car. Start at the OBD-II port under the dash and check whether anything is plugged into it. Then work through the cabin: under and between the seats, under the floor mats, inside the glovebox and centre console, the boot and its spare-wheel well, and any loose or recently disturbed trim. Look for a small box, a stray wire spliced into the car's wiring, or a device with a SIM slot.
For a guided version that takes you round the vehicle in order, the Room Sweep Companion includes a vehicle sweep, free to use.
Room Sweep Companion
Run the free guided vehicle sweep at Room Sweep Companion. It walks you through each area of the car in order, then gives you a clear coverage summary for review.
Using an RF detector to find a transmitting tracker
A physical search finds trackers you can see; an RF detector helps with ones you might miss, by picking up the radio signal a tracker emits when it reports its position over the cellular network.
Move a detector slowly around the car, inside and out, watching for the signal to strengthen as you near a source. The honest limitation is timing: many battery trackers sleep to save power and only transmit in short bursts, so a tracker may be silent at the exact moment you sweep. For that reason an RF sweep works best as a complement to the physical search, not a replacement — and repeating the sweep while the car is moving (when trackers are most likely to report) improves the odds. You will find suitable RF detectors on our counter-surveillance equipment page.
Battery, hardwired and OBD trackers
Knowing the type tells you where to look and how it behaves. Magnetic battery trackers are the self-contained boxes stuck underneath; they are the most common and the easiest to find physically, and they run flat eventually. Hardwired trackers are spliced into the car's electrics, often hidden behind the dashboard, and run indefinitely — these are more concealed and may warrant a professional eye. OBD trackers plug into the diagnostic port, draw constant power and are quick to fit and remove, which makes the OBD port the first place to check.
What to do if you find a tracker
Do not assume the worst, and do not immediately tear it out. Some trackers are legitimate — a financed or leased vehicle, a company fleet car, a family-shared car with consent. Establish whether there is an innocent explanation first. If there is not, treat it carefully: photograph it in place and note where it was, because if this relates to stalking or harassment the device is evidence and an undisturbed record matters. Covertly tracking someone's movements without consent can be a criminal matter, so if you believe you are being followed or are in danger, contact the police rather than simply removing it — and prioritise your safety over investigating further.
Is it legal to put a GPS tracker on a car?
It depends entirely on consent and ownership. Tracking a vehicle you own, or one whose driver has consented, can be lawful — fleet management and financed vehicles are common examples. Covertly tracking another person's movements without their knowledge, however, is restricted across Switzerland and the EU and can amount to a criminal offence, particularly in the context of stalking or harassment. Checking your own car for a tracker is, of course, entirely lawful.
We cover how vehicle checks fit into a wider routine in the complete detection guide, and the field guides lay out the vehicle sweep as a printable reference. Theft, rather than tracking, is a related concern: see how to prevent keyless car theft (relay attacks) for how the paired attack works and the countermeasures.
A car should be yours alone to know the movements of. A methodical check confirms it is.
Frequently asked questions
Where is a GPS tracker usually hidden on a car? Most often underneath: magnetic trackers on the undercarriage, inside wheel wells, or behind bumpers. Inside, the most common spot is the OBD-II port under the dashboard, followed by under the seats, the glovebox, the centre console and the boot.
How can I tell if there is a tracker on my car? Search the common spots with a torch and an inspection mirror — undercarriage, wheel wells, bumpers, then the OBD port and cabin — looking for a small box, magnets or spliced wiring. An RF detector can also pick up a tracker while it is transmitting, though battery trackers often sleep between bursts.
Can an RF detector find a GPS tracker? Yes, when the tracker is transmitting its position over the cellular network. The limitation is that many battery trackers only transmit in short bursts to save power, so they may be silent during a sweep — which is why a physical search remains essential alongside the detector.
Is it illegal to track someone's car? Covertly tracking another person's vehicle without consent is restricted across Switzerland and the EU and can be a criminal offence, especially in stalking or harassment cases. Tracking a vehicle you own or with the driver's consent, such as a fleet or financed car, can be lawful. Checking your own car is always legal.