M3/M1 Head-Up Display — OBD2 & GPS Windscreen Speedometer | JAR & Co

Keep your eyes on the road, not the dash. This compact 3.2" head-up display projects key driving data — speed, voltage, temperature, and alarm warnings — onto a reflective film on your windscreen, right in your line of sight.

Available in two versions: the M3 (OBD2), which plugs into your OBD2 port for full engine data, and the M1 (GPS), which works on virtually any vehicle by calculating speed via satellite.

Why upgrade:

• 3.2" windscreen projector with integrated shading hood — no glare at night
• Displays speed, voltage, and (OBD2 version) coolant temperature and mileage
• Five built-in alarms: over-speed, low voltage, high water temperature (OBD2 version), fault code, and fatigue driving
• Fatigue driving alarm adjustable from 1–8 hours
• Auto on/off with the engine — display activates automatically when driving
• Switchable km/h or mph display

What's included: HUD unit, connector cable (OBD2 or GPS receiver depending on version), reflective display film, mounting adhesive, user manual

Fitment note — please read before ordering:

Select the version that suits your vehicle:

• M3 (OBD2): Suits petrol vehicles with an OBD2 port (generally vehicles manufactured from 2008 onwards in Australia). Not compatible with diesel, hybrid, or electric vehicles, or vehicles with a modified engine computer.
• M1 (GPS): Works on virtually any vehicle, including diesel utes and 4WDs, since it calculates speed via GPS rather than reading from the OBD2 port. Recommended if your vehicle is diesel or you're unsure which version to choose.

Still not sure which version suits your car? Contact us via our contact page before ordering and we're happy to help.

Install tip: For the OBD2 version, plug the cable into your OBD2 port (usually under the steering column or dash) and route it along the A-pillar trim. For the GPS version, position the unit with a clear view of the sky for satellite reception — near the windscreen works well. Apply the reflective film to a clean section of windscreen within your eyeline and position the HUD unit on the dash. No tools required — most installs take under 10 minutes.

Compliance note: Position the display so it doesn't obstruct your view of the road — HUD units that block the driver's line of sight may not be road-legal in all states. Check your local regulations before fitting to a road-registered vehicle.