Monster Gauge - Multi-function OBDII Gauge

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
• 2-year NZ warranty

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.

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, 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.

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. There is no wiring and nothing permanent, and it only reads data your engine computer already broadcasts – unplugging it returns the vehicle to exactly as it was.

$395 NZD inc. GST.

Not all ECU Shop items are held in stock at Coast 4x4. Anything we don't have on the shelf is available for direct shipping from within New Zealand.