Is your Range Rover, Discovery, or Range Rover Sport looking a little... wonky? Perhaps it's leaning to one side, or the rear is sitting lower than the front, even though there are no warning lights on the dash.
This is a common issue as suspension components age or after sensors are replaced. The car's computer (ECU) loses track of what "level" actually means.
In the excellent video below, you can see a professional technician performing a ride height calibration on an L405 Range Rover. Watch the process first, and then we'll show you how to do the exact same job at home without the expensive professional tool.
The Pro Secret: You Don't Need a $3,000 Tool
The technician in the video uses a high-end professional scanner. It works great, but it costs a fortune.
The good news? The iCarsoft LR V4.0 performs this exact same function. It communicates with the Air Suspension module just like the dealer tool does, allowing you to input measurements and level the car.
DIY Calibration: The Critical Steps Explained
Based on the video and professional best practices, here is your step-by-step guide to doing this yourself.
1. The car MUST be on dead-level ground.
2. The engine must be running to power the compressor. Ensure your battery is healthy (see our BMS Guide).
3. Close all doors, hood, and tailgate nicely.
Plug in your iCarsoft LR V4.0. Navigate to Service > Suspension > Height Calibration. Follow the on-screen prompts. The car will likely lower itself to a "baseline" level and may ask you to start the engine.
As shown clearly in the video at the 1:15 mark, accuracy here is everything. You need a reliable metric tape measure.
- Measure from the exact center of the wheel hub cap.
- Measure straight up to the bottom edge of the fender arch directly above it.
- Record the measurement in millimeters (mm) for all four wheels: Front Left, Front Right, Rear Left, Rear Right.
Don't guess! Being off by 10mm will result in a crooked car.
The iCarsoft tool will ask for the measurements you just took. Enter them precisely using the touchscreen keypad.
Once entered, the tool sends this "real world" data to the suspension computer. The computer calculates the difference between where it thinks it is versus where it actually is, and adjusts the air pressure in each strut to level the vehicle.
FAQ: Common Calibration Questions
Q: Can I use this feature to lift my truck?
Technically, yes. By inputting measurements that are *smaller* than reality, you trick the computer into thinking the car is too low, and it will raise it. However, extreme changes can cause a harsh ride and suspension faults. Use with caution.
Q: Why must the engine be running?
The air suspension compressor consumes a massive amount of electricity. If the engine isn't running, you risk draining the battery rapidly, which can cause the calibration process to fail mid-way. Always ensure a stable power supply.
Q: The video shows a Range Rover, does this work on a Discovery LR4?
Yes. The principle and the software menu structure in the iCarsoft LR V4.0 are nearly identical for Discovery 3/4, Range Rover Sport, and full-size Range Rover models with air suspension.
Stop Paying the "Rover Tax"
A dealership will charge anywhere from $300 to $600 for the procedure you just watched. The iCarsoft LR V4.0 costs less than one visit and lets you manage your suspension, brakes, and engine anytime you want.
Get Your Professional Calibration Tool Now
