For years, the ScanGauge 2 earned its place in Australian 4WDs by doing something refreshingly practical: plugging into the diagnostic port and showing useful vehicle data without needing a phone, an app or a permanent installation.
Then ScanGauge 3 arrived with a colour touchscreen, more gauges on screen and automatic X-Gauge detection.
That creates a reasonable question. Is ScanGauge 3 genuinely better for your setup, or is the simpler ScanGauge 2 still the smarter buy?
The short answer
Choose ScanGauge 3 if you want to see more information at once, prefer a touchscreen, value visual and audible alerts or want easier access to supported manufacturer-specific gauges.
Choose ScanGauge 2 if you prefer physical buttons, want a smaller and simpler display, or specifically value its performance-monitor functions.
Both provide the fundamentals: live OBD2 gauges, trip computers, fuel information, fault-code functions and X-Gauge support. The biggest difference is how easily that information can be configured and viewed.
ScanGauge 2 vs ScanGauge 3 comparison
| Feature | ScanGauge 2 | ScanGauge 3 |
|---|---|---|
| Display | Compact button-controlled display | 2.4-inch capacitive colour touchscreen |
| Gauges visible at once | Up to 4 | Up to 9 per screen |
| Gauge pages | Customisable four-gauge view | Multiple configurable pages |
| X-Gauge support | Yes, generally entered manually | Yes, with automatic scanning for supported X-Gauges |
| Alerts | No equivalent configurable visual and audible gauge alarms | Configurable visual and audible alarms |
| Firmware updates | Model-dependent service process | Wi-Fi firmware updates |
| Performance monitor | Yes | No |
| Trip computers | 5 | 5 |
| Fault codes | Read and clear supported codes | Read and clear supported codes |
| Best suited to | Drivers wanting compact, straightforward monitoring | Drivers wanting richer at-a-glance monitoring and easier setup |
Available gauges depend on the vehicle. Confirm compatibility for any specific transmission, DPF, EGT or other manufacturer-specific reading you need.
The difference you notice every day
Imagine towing into a headwind with a long incline ahead.
On ScanGauge 2, four carefully selected readings can give you the essentials—perhaps transmission temperature, coolant temperature, engine load and battery voltage. It is focused and easy to understand.
On ScanGauge 3, you can place up to nine gauges on a screen and create multiple pages. That allows you to see the core temperatures alongside fuel consumption, boost, DPF information and other supported data without replacing one gauge to make room for another.
If you only ever want four readings, that advantage may not matter. If your towing setup has several systems you want to observe together, it can make the story much clearer.
Touchscreen or physical buttons?
This is partly preference.
ScanGauge 2's physical buttons are direct and familiar. Its compact form works well for drivers who want information without a larger screen on the dashboard.
ScanGauge 3's colour touchscreen makes layouts and navigation more visual. The display can be configured to suit the information you want available, and its colours can be adjusted to work with the vehicle's interior.
Whichever model you choose, configure it while stationary. A monitoring device should reduce uncertainty, not distract the driver.
X-Gauges and vehicle-specific data
Standard OBD2 readings only tell part of the story. X-Gauge support can expose compatible manufacturer-specific parameters such as transmission temperature, DPF soot information, exhaust temperature and other vehicle data.
ScanGauge 2 supports X-Gauges, but setting them up may involve entering the appropriate commands. ScanGauge 3 can automatically scan for supported X-Gauges, making discovery and setup easier.
Automatic detection does not mean every desired parameter exists on every vehicle. Compatibility still depends on what the vehicle reports.
Alerts change how you use the information
A gauge tells you what is happening when you look at it. An alert can draw attention when a configured high or low threshold is reached.
ScanGauge 3 adds visual and audible alarms to supported gauges. For a towing vehicle, that may be valuable when monitoring temperatures or voltage without constantly watching the display.
Thresholds must be chosen using appropriate information for the exact vehicle. Copying another owner's alarm number without understanding sensor location and manufacturer guidance can create either unnecessary warnings or false confidence.
Where ScanGauge 2 still has an advantage
Newer does not mean better for every driver.
ScanGauge 2 is compact, proven and intentionally uncomplicated. It also includes a performance monitor for acceleration, braking and related measurements—a function not carried into ScanGauge 3.
If your priority is four live gauges and straightforward button controls, ScanGauge 2 remains a capable tool rather than an obsolete one.
Which one should you buy for towing?
For most buyers building a new towing or touring setup, ScanGauge 3 is the stronger choice. Seeing more related readings together, setting alerts and automatically finding compatible X-Gauges address the reasons many people add an engine monitor in the first place.
The ScanGauge 3 available from Battery Force is a particularly good fit when you want one standalone display for transmission, engine, trip and diagnostic information.
Before buying, decide which readings you actually need and confirm that your vehicle supports them. Our guide to monitoring a 4WD while towing will help you create that shortlist. You can then read more about transmission-temperature monitoring and understanding DPF regeneration if those are priorities for your setup.
The best model is the one you will understand
Nine gauges are not automatically more useful than four. A touchscreen is not automatically better than buttons. The right choice is the device that shows the information your vehicle supports in a form you can interpret quickly and safely.
ScanGauge 2 keeps that experience deliberately simple. ScanGauge 3 expands it. For towing, touring and modern diesel monitoring, that extra visibility will usually justify choosing the newer model.
