How would this interface with a microsquirt stand alone ecu and on a car pre-obd ii?

Don't get this one. Get the 30-0300, it comes with the complete harness. The 30-0333 is for new cars that can read the sensor off the canbus. Get the 30-0300.

Why does it show pictures of the 30-0311 but states this product is the 30-0344 for “piggy back” capabilities with hp tuners?

Not entirely sure what you mean. My kit came as pictured and works as advertised.

Will this wideband gauge work in “standalone mode”? i have a carbureted vehicle i need to tune and have no use for the obdii connectivity.

Yes. The gauge will display AFR on its own without connecting any of the obdii wiring

Does the digital gauge still work if the obd port is not connected? I would use this wideband for multiple car use not a single install.

Yes. The OBD pass through connector is just to get the information into your data logging software. The sensor reads into the gauge and then sends signal through a separate plug to the OBD port.

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30-0333 X-Series OBDII Wideband UEGO AFR Sensor Controller Gauge

Product ID: 289509011

Details

Brand
AEM
Item dimensions L x W x H
15.2 x 12.7 x
Item weight
0.5 Kilograms
Material
Plastic (PC)
UPC
840879025199

⚡Fastest wideband AFR response

📏Compact 52mm slim gauge design

🔗Seamless OBDII CAN-bus integration

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Description

⚙️ Tune Smarter, Drive Stronger — Don’t Get Left Behind!

SLEEK SPACE SAVING DESIGN - 52mm diameter with a slim 0.825" depth fits seamlessly into any dashboard setup.
LIGHTNING FAST AFR READINGS - Experience ultra-responsive air-fuel ratio monitoring for precision tuning.
PROVEN COMPATIBILITY TRUST - Verified with HPTuners and DashDAQ, backed by a 4.6-star rating from 140+ enthusiasts.
BOSCH 4 9 LSU SENSOR INCLUDED - Industry-leading sensor ensures unmatched accuracy and reliability in every reading.
PLUG PLAY OBDII PASS THROUGH - Effortlessly stream AFR data through your factory ECU’s CAN-bus—perfect for piggyback and open-source tuners.

The AEM 30-0333 X-Series OBDII Wideband UEGO AFR Sensor Controller Gauge delivers lightning-fast, accurate air-fuel ratio readings via factory CAN-bus integration. Featuring a Bosch 4.9 LSU sensor and a compact 52mm gauge, it’s engineered for professional tuners using piggyback or open-source software. Trusted by the tuning community with proven compatibility and a sleek design, it’s the ultimate upgrade for precision engine management.

Specifications

ASIN	B01G5Y9YEW
Brand	AEM
Customer Reviews	4.6 4.6 out of 5 stars (140)
Date First Available	25 May 2016
Item Weight	500 g
Item model number	30-0333
Manufacturer	AEM
Manufacturer part number	30-0333
Model	Universal
OEM Part Number	30-0334
Product Dimensions	15.24 x 12.7 x 12.7 cm; 500 g

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