💡 Tips
⚠️ Please Note
1. We provide a one-year warranty (excluding damage caused by human factors). All warranty claims require proof of professional installation.
2. Manual measurement, please allow 1–3 mm error, thank you. Due to the difference between different displays, the picture may not reflect the actual color of the item. We guarantee that the style is the same as shown in the picture. Please understand, thank you!
❓ Frequently Asked Questions
Q What vehicles are compatible with the DO903 Racing Gauge?
The DO903 is compatible with all 12V OBDII vehicles. As long as your vehicle uses a standard OBD2 port and runs on a 12V system, the gauge will connect and operate correctly via Bluetooth.
Q How does the DO903 connect to the vehicle?
The DO903 connects to your vehicle through the included Bluetooth OBD2 unit. Simply plug the OBD2 unit into your vehicle's OBD2 port, and the display will pair wirelessly via Bluetooth — no complex wiring required.
Q What parameters can the multi-function display area show?
The multi-function display area can show one of the following values at a time: Date, Speed Value (RPM), Intake Pressure (MAP), Intake Air Flow (MAF), or Inlet Air Temperature (IAT). You can switch between these in the system setup menu.
Q How does the alarm system work on the DO903?
The DO903 features alarm functionality for RPM and Speed parameters. When a set threshold is exceeded, the unit warns the driver through both audible alerts (buzzer) and visual indicator lights (8 LED indicators), ensuring you are promptly notified of any abnormal readings.
Q Can the display brightness be adjusted automatically?
Yes. The DO903 offers both manual and automatic brightness adjustment. In automatic mode, the display adapts to the current ambient light environment. There are also three manual brightness levels available to suit your preference.
Q What is included in the warranty, and are there any conditions?
The DO903 comes with a one-year manufacturer's warranty. The warranty covers manufacturing defects but does not cover damage caused by human factors such as improper installation or misuse. All warranty claims must be supported by proof of professional installation.