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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X-Series Wideband UEGO AFR Sensor Controller Gauge with OBDII Connectivity

Product ID: 28770127

Details

Brand
AEM
Item Weight
0.5 Kilograms
Item dimensions L x W x H
6 x 5 x 5
Material
Metal Plastic
Number of Items
1

⚡Fastest wideband AFR response

📊High-precision AFR display to hundredths

🔗Seamless OBDII CAN-bus integration

$630.69

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Description

⚙️ Tune Smarter, Drive Faster — The Ultimate AFR Edge

LIGHTNING FAST AFR RESPONSE - Experience real-time air/fuel ratio data with industry-leading speed for precision tuning.
PRECISION BOSCH 4 9 LSU SENSOR - Utilizes a top-tier sensor for ultra-accurate air/fuel measurements, ensuring optimal engine performance.
PLUG AND PLAY OBDII CONNECTIVITY - Effortlessly stream AFR readings through your factory ECU CAN-bus—perfect for piggyback or open-source tuning setups.
CUSTOMIZABLE DISPLAY AUTO DIMMING - Tailor your gauge readout with multiple display modes and enjoy clear visibility day or night with auto dimming.
COMPACT SLEEK DESIGN WITH LOCKING CONNECTORS - Fits seamlessly into your dash with a slim 52mm gauge and secure locking connectors for professional-grade installation.

The AEM X-Series Wideband UEGO AFR Sensor Controller Gauge delivers the fastest response times in wideband AFR monitoring, integrating seamlessly with your vehicle’s OBDII CAN-bus for real-time data streaming. Featuring a Bosch 4.9LSU sensor, customizable display options, and a compact 52mm gauge design, it’s engineered for precision tuning and professional-grade performance monitoring.

Specifications

ASIN	B01G5Y9YEW
Best Sellers Rank	#152,337 in Automotive ( See Top 100 in Automotive ) #8 in Automotive Replacement Air & Fuel Ratio Gauges
Brand Name	AEM
Customer Reviews	4.5 4.5 out of 5 stars (158)
Global Trade Identification Number	00672713960775
Item Dimensions	6 x 5 x 5 inches
Item Weight	0.5 Kilograms
Manufacturer	AEM Electronic Inc.
Material Type	Metal, Plastic
Model	30-0333
Part Interchange Info	30-0333
Part Number	30-0333
Set Name	OBD-II
UPC	840879025199 608067031410 672713960775
Unit Count	1.0 Count

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$630.69

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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