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30-0300 AFR Wideband O2 Sensor Kit, 52mm (2-1/16") Digital Air Fuel Ratio Gauge with LSU 4.9 UEGO Sensor, 0-5V & CANbus Data Logging for 12V Gas E85 Diesel

  • Based on 7 reviews
Condition: New
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$99.99 Why this price?
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Availability: 20 left in stock
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Arrives Monday, Oct 26
Order within 2 hours and 13 minutes
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Features

  • LIGHTNING-FAST 20MS RESPONSE Maximize Power & Stop Engine Blown. This wideband O2 sensor kit delivers a real-time 20ms transient response with zero signal lag. It sensitively identifies every slight fluctuation in your mix, providing instant feedback to your car engine to ensure a safer, more powerful tune during high-boost dyno pulls.
  • PLUG & PLAY REPLACEMENT Premium LSU 4.9 Sensor Included & Pre-Calibrated. An exact direct-fit aftermarket solution for the popular 30-0300 wideband uego setup at a fraction of the cost. Features a premium afr gauge wideband kit with dual calibration modesutilizing hassle-free Resistor Trim Mode (rCAL) for out-of-the-box accuracy without mandatory free-air calibration.
  • 3 DISPLAY MODES AT A GLANCE Reversible Faceplate & 24-Color LEDThe standard 2-1/16" (52mm) universal digital wideband monitor features a sweeping 24-color-coded LED display and a 4-digit central readout. Easily switch between Air-Fuel Ratio (AFR), Lambda, and Oxygen Percentage O2 to instantly track vehicle conditions for Gas, E85, or Diesel.
  • 0-5V & CANBUS DATA LINK Seamless Integration with Standalone ECUs Engineered for serious garage builders, the universal controller box includes universal 0-5V analog, RS232 serial port, and CANbus outputs. It effortlessly links with your engine management systems and data loggers for precise tracking, while safely supporting system voltages up to 16V.
  • OEM-GRADE RUGGED QUALITY Heavy-Duty Build for Harshest Track Environments Built to withstand extreme racing conditions without failure. This comprehensive automotive replacement gauge kit features a high-durability single-board design, locking wire connectors, a premium SUS310 exhaust bung, and high-density braided sleeving to completely shield against intense track vibration and heat.

Brand: wait wit


Material: Plastic


Number of Items: 1


Unit Count: 1 Count


Number of Packs: 1


Brand Name: wait wit


Number of Items: 1


Unit Count: 1 Count


Number of Packs: 1


Part Number: 30-0300


UPC: 648564074329


Manufacturer: wait wit


Included Components: Air Fuel Ratio Lambda Gauge, Wideband LSU 4.9 O2 Oxygen Sensor


Model: 30-0300


Material Type: Plastic


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Oct 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Easy to install
This AFR gauge perfectly fit my needs. It was build with solid material and the display was very clear. Reading the value is quite straightforward. I was able to remove the old one and connect the new one without any issue. Overall quite happy with this order.
Reviewed in the United States on July 18, 2026 by Jimmy

  • Great
I’m super happy with this wideband AFR gauge kit. It seems like a solid build since the digital display housing and the braided sensor line feel really strong. Mounting the gauge in the pod and routing the harness was super easy. And didn't run any issues getting the connections pinned together. It fits and is compatible with my 12V gas truck. It fixed my issue with tuning under heavy load because the real-time response lets me track my exact air-fuel mix instantly without any lag. Overall, it works great and I think it's a great value!!! ... show more
Reviewed in the United States on July 4, 2026 by Patricia Elder

  • Easy install
My first afr guage so with that said i like it alot but kind of hard to read cause the numbers change so rapidly, maybe thats just the way it is.
Reviewed in the United States on August 13, 2026 by crc

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