GPS for rental and leasing: the OBD case

If the vehicles aren't yours —rental, operating lease, car sharing, a mixed fleet with no installer available— you can't go around cutting wires. The OBD II port is the answer. This page explains when it works, when it doesn't, and why the FMC003 is the right device.

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Why OBD is the option for rental and leasing

The rental contract prohibits modifying the vehicle. Cutting the ignition wire, wiring a relay into the fuel pump or drawing permanent power from the dashboard CAN bus is off the table. When you return the car, it has to be exactly as it left the factory.

The OBD II connector (mandatory on every petrol car since 2001 and every diesel since 2004 in the EU) gives you three things in a single socket: permanent power, ignition and CAN bus. You plug it in, remove it on return, no trace.

FMC003: real plug & play OBD

The FMC003 is the Teltonika OBD II 4G device. Plug & play in the literal sense: you plug it into the dashboard OBD port, the car powers it, the tracker authenticates against the ECU and starts reporting.

Features that matter for rental:

  • Compact size: it doesn't stick out of the OBD recess on most models. On cars where it does, a discreet OBD extension cable under the dash.
  • 4G LTE Cat 1 with 2G fallback.
  • Multi-constellation GNSS (GPS + Galileo + GLONASS).
  • Internal accelerometer: detects movement even with the car switched off, for crash detection and eco-driving events.
  • Internal backup battery: if someone unplugs the tracker, the FMC003 sends an alert before shutting down.
  • Fleet-wide management via FOTA Web.

What data the OBD gives you

Over standard OBD II (Mode 01 and onwards) the FMC003 reads:

  • Vehicle speed (not GNSS, but the real odometer speed).
  • Engine RPM.
  • Engine load as a percentage.
  • Coolant temperature.
  • Instantaneous fuel consumption (on compatible vehicles).
  • DTC fault codes.
  • MIL status (fault warning light).
  • Vehicle battery voltage.

On vehicles with manufacturer OBD extensions (some Volkswagen Group, BMW, PSA) there are additional parameters such as kilometres to next service, AdBlue, tyre pressure. They are read with specific profiles in the configurator.

What the OBD does NOT give you

OBD II is a diagnostic protocol, not a control one. That means:

  • You can't cut the engine. There are no digital outputs. If you need anti-theft immobilisation, OBD won't do.
  • You can't read iButton or RFID. If you need driver identification in a corporate fleet, OBD falls short.
  • It has no RS485 or port for LLS fuel probes. For refrigerated delivery or external fuel measurement, it's not the right piece.
  • Some vehicles cut OBD power with the car switched off. In those cases the tracker sleeps between starts (the FMC003 uses its internal battery to send its last state before going to sleep).

When OBD isn't enough: alternatives

  • You need engine cut-off: FMC920 hardwired, professional installation. Some rental firms do accept it if the installer certifies the brand and leaves no trace.
  • You need tachograph and J1939: the vehicle isn't a typical rental, it's a heavy commercial. Move to the FMC650.
  • You need full CAN bus reading without touching the car: devices with non-intrusive CAN-CONTROL (inductive reading), but that's already professional installation, not plug & play.

Operations for a rental or operating-lease fleet

If you manage more than 30 rental vehicles, the typical flow with the FMC003:

  1. Vehicle handover: the driver picks it up at the dealership. The manager plugs the FMC003 into the OBD in 60 seconds.
  2. Remote provisioning: the device shows up on the platform with its IMEI, and you assign driver and plate from your desk.
  3. Managing the contract lifecycle: mileage reporting to avoid excess penalties (rental contracts have a km/year limit), eco-driving to reduce accident rates, geofence alerts if the car leaves an agreed territorial scope.
  4. Return: you unplug the FMC003 and keep it for the next vehicle in the batch. No marks on the wiring, no trace in the ECU.

The same device rotates between vehicles over the life of your fleet. That's the real economics of OBD versus hardwiring.

Frequently asked questions

Does the FMC003 work in every car?

In every car with standard OBD II (EU petrol since 2001, diesel since 2004) and in most modern vans. On heavy vehicles with J1939 you need an adapter or you move to the FMC650.

Will the fault warning light come on when I connect the FMC003?

No. The FMC003 acts as a passive diagnostic tool: it only reads, it doesn't write parameters that trigger the MIL. It is certified not to affect the vehicle's operation.

Can the rental firm or the dealership detect it?

At a glance, yes: it's plugged into the OBD. It isn't a hidden device. But it leaves no trace in the ECU or the wiring, so once you unplug it there's no record. If the contract requires explicit authorisation, check with your rental firm.

What if someone unplugs it with bad intent?

The FMC003 has an internal backup battery. Before shutting down it sends a disconnection alert with the last position. On top of that, you can put the OBD behind a screwed-on cover if the customer allows it.

How much does the FMC003 cost in an order of 30 units?

There's volume pricing from 10 units and a further improvement at 50/100. Request a proposal at info@trackiber.com stating volume and target platform.

Can I return the FMC003 if I change my mind?

No. Trackiber sells to professionals (B2B), so the 14-day right of withdrawal for consumers does not apply. If for a reasonable commercial reason you need to return an unopened unit, it's assessed case by case: request within 14 days of receipt, product unused and unconfigured with seals intact, return shipping is at the customer's expense and a reconditioning charge may apply (up to 20%). Full detail in the returns policy. If the device arrives faulty or with a Trackiber logistics error, we pay the return shipping.

Try the FMC003 in your fleet

If you manage rental or operating leasing and want to pilot with 5–10 units before scaling, get in touch. We are an official Teltonika distributor and ship from 1 unit for validation.

Request a proposal