GX-Series Wideband AFR Controller Gauge Air fuel Ratio

Perfect for your street car or hot rod to read your Air Fuel Ratio 

 Brand New  o2 UEGO Wideband Air Fuel Ratio Gauge Kit, direct OE specification replacement & tuning upgrade
 Interchange Part Number: 30-0300
 High Performance Design: Built under strict quality control standards for reliable performance and long service life
 52mm (2 1/16") Standard Gauge Size: Universal size for easy dashboard mounting
 Comes with 4.9 LSU Wideband Oxygen Sensor: Real-time fast and precise AFR readings within hundredths of a second
 Accurate Air/Fuel Ratio Monitoring: Provides essential data for safe and powerful engine tuning, optimizes engine operating conditions
 Simple & Easy Installation: Straight forward operation, complete wiring accessories included for convenient setup

• If you are just using it as a standalone dash gauge, your wiring is incredibly straightforward. You only need to hook up two wires from the 10-pin harness to get it up and running.
  🔌 Standalone Wiring Steps
  1. Red Wire (Pin 1): Connect this to a Switched 12V (+) power source.
     • Tip: Choose a circuit that only gets power when the key is turned to the "ON" or "RUN" position (like a cigarette lighter or radio circuit). Do not connect it directly to the battery, or the gauge will stay on permanently and drain your battery.
  2. Black Wire (Pin 2): Connect this to a clean Chassis Ground (-) or engine block ground.
  3. Isolate the rest: Insulate the tips of the remaining loose wires (White, Brown, Blue, Green/Black, White/Black) with electrical tape or heat shrink so they don't accidentally touch metal and short out.
  4. Plug in the sensor: Run the 8-pin harness through the firewall and plug it straight into the Bosch LSU 4.9 sensor in your exhaust.
  ⏱️ Essential Warm-Up Routine
  When you turn the key on, the gauge face will display a countdown or flash a reading like --- or HEAT.
  Do not crank the engine immediately. Clone gauges have fragile heater control circuits. It is highly recommended to let the gauge finish its warm-up cycle (usually about 20–30 seconds) until it reads ambient air before you turn the key further to start the car. This prevents thermal shock from cold moisture hitting a rapidly heating sensor element, which is the #1 cause of dead sensors on these aftermarket units.
  Are you planning to weld a new exhaust bung for the oxygen sensor, or are you mounting it into an existing spot? If you're welding a new one, You need it on a 10 Degree angle to prevent condensation damage.