Throttle controllers are nothing new to the four-wheel drive scene.

We’ve been using them for years to tailor throttle response to suit how and where we drive. They have proven especially beneficial on turbo-diesel vehicles, where accelerator calibration can add to the feeling of turbo lag. A throttle controller will usually have multiple modes to alter how accelerator-pedal inputs translate into throttle response, making the vehicle feel more responsive.

Throttle controllers do not increase engine power or torque, nor do they eliminate turbo lag itself. They simply alter how the engine responds when you put your foot down on the accelerator. And that’s pretty much all they do – until now.

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More than a throttle controller 

The Australian-developed iThrottle BTX control unit (↗) does everything throttle controllers have done in the past but adds a host of useful functions, such as a winch mode and throttle disabler, all in one unit.

It offers drivers nine stages of calibration to either sharpen response for performance or soften it for smoother control when driving off-road. Like the selectable drive modes built into most modern four-wheel drives, the iThrottle has preset modes for towing, sand driving and rock crawling, which can be further adjusted to suit your needs. The last thing a driver wants is an overly sensitive accelerator when bouncing over rocks or rough terrain, so the modes for those conditions soften the response to accelerator inputs.

Modes can be selected by scrolling through the menu on the iThrottle screen. For added convenience, all functions can also be controlled using the iThrottle phone app. With your phone mounted in a secure holder, you can select modes by tapping the onscreen buttons or adjust sensitivity using the slider.

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Extra features: Winch mode, immobiliser and diagnostics

If your four-wheel drive has an electric winch fitted, you’ll know the benefits of keeping the engine revs up while using it.

This can increase the alternator’s output, helping support the battery while the winch draws a heavy electrical load. Winch mode allows you to set and hold the engine speed for the duration of the winching operation. It’s a simple and clever addition to the iThrottle unit (↗).

Another clever function is the SmartLock pedal immobiliser. As the name suggests, SmartLock disables the accelerator pedal when you leave the car, and it can only be reactivated once you enter a code you’ve set yourself. Again, this uses the factory hardware, with the iThrottle able to disable the accelerator pedal once you’ve set up the feature in the app. For further theft protection, iThrottle Australia also sells locks to prevent unwanted access to the car’s OBD port.

The functionality and reassurance of an OBD scan tool and diagnostic aid can also be added to the iThrottle app with the optional OBD Tool. This dongle plugs into the vehicle’s OBDII port and connects to the app via Bluetooth, allowing you to scan for engine fault codes, find out what they mean and clear them if needed.

Many travellers consider an OBD scanner essential equipment when touring the country. Adding this option to your iThrottle means you don’t need a separate standalone scanner, with the information accessible through the iThrottle app on your phone.

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iThrottle BTX tested on our 2026 HiLux 

We fitted the iThrottle BTX controller and OBDII reader to our 2026 HiLux to see how well they work.

It’s a relatively simple plug-and-play installation. Once fitted and linked to my phone via Bluetooth, we explored the settings, checked out the modes and tested the winch and immobiliser functions before hitting the road. The immobiliser won’t prevent thieves from getting into your car or starting it, but it disables the accelerator pedal so they can’t use it.

On the road, we switched between the different modes, and you can certainly feel the difference between them. Position 1 on the slider softens throttle response, and the ‘Crawl’ mode has a similar effect, while position 9 sharpens it up with an immediate response to even light pedal inputs. Off-road and in low range, we selected ‘Crawl’ and let the ’Lux idle through the melon holes, applying minimal throttle when needed. It was certainly easier to control than with the factory Toyota calibration.

We’ve since tried a few different settings for general driving but have settled on the ‘Intelligent’ mode, which monitors your driving and adapts the setting to suit your style. I’ve found this works well for day-to-day on-road use.

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Verdict

The iThrottle unit (↗) works just like other throttle controllers on the market in terms of throttle feel and calibration, but it’s the extra features that make it better than the others and worth considering even if you already have a controller.

The built-in drive modes, winch mode and immobiliser function are all clever, useful features that broaden the controller’s capabilities. Add the OBD Tool and you can also read fault codes without having to find a workshop or carry a separate standalone scanner. It’s a clever Australian concept that has been well executed in the iThrottle unit.

iThrottle BTX FAQ

How much does the iThrottle BTX cost?

The iThrottle BTX throttle controller has an RRP of $345.

How much does the iThrottle OBDII Scan Tool cost?

The optional OBDII Scan Tool costs $125.

What features does the iThrottle BTX offer?

Features include adjustable throttle response, preset driving modes, winch mode and a SmartLock pedal immobiliser.

Is the iThrottle BTX worth buying?

Its extra features, including winch mode, pedal immobilisation and optional engine diagnostics, make it worth considering even if you already have a throttle controller.

Where can I buy the iThrottle BTX?

Visit the iThrottle Australia website (↗) for more information.

MORE iThrottle BTX 4WD throttle controller!