Monster Gauge
Multi-function OBDII gauge: monitor every parameter your engine can talk to.
- Live engine data: temp, boost, RPM, AFR (air-fuel ratio) & more
- Read & clear DTCs (diagnostic trouble codes)
- 0–100 km/h timer + performance logging
Or 4 interest-free payments of $98.75 with afterpay
One gauge, every number that matters
The Monster Gauge plugs into your OBDII port and reads live data straight from your engine's computer. No sensors to fit, no wiring to run.
Watch it while towing
Keep coolant temperature and boost pressure in view on long climbs with the boat or trailer on, and back off before heat becomes a problem instead of after.
Diagnose without a mechanic
When a warning light appears, read the fault code and its meaning on the spot, then clear it after the fix. No workshop visit just to find out what the light was.
Measure your gains
Built-in 0-100 km/h and 0-400 m timers log real performance runs, so you can measure the difference a throttle controller or tune actually makes.
Specs & what's in the box
Live monitoring covers coolant temperature, boost pressure, RPM, throttle position, air-fuel ratio, mass air flow and more, depending on what your vehicle's computer reports. The unit reads and clears DTCs (diagnostic trouble codes), runs 0-100 km/h and 0-400 m performance timing, and mounts to the dash or windscreen with the included hardware.
In the box: the Monster Gauge unit, OBDII connector cable and mounting hardware. Full specifications are on the Monster Gauge product page.
Will it work with my vehicle?
It works with petrol and diesel vehicles that have an OBDII port, which covers most NZ vehicles from the early 2000s onwards. Check your vehicle has an OBDII port (usually under the dash, driver's side) before ordering.
Is installation difficult?
No. It plugs straight into the OBDII port, and the mount fits the dash or windscreen. There is no wiring and nothing permanent, so it moves between vehicles in minutes.
Can it damage my engine or void my warranty?
The Monster Gauge only reads data your engine computer already broadcasts. It changes nothing about how the engine runs, and unplugging it returns the vehicle to exactly as it was.