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Your cart is empty.The Fastest Responding Wideband AFR Controller. Use the factory 02 calibration or free-air calibrate using buttons on faceplate. It has shipping options to quickly meet every need, including same-day shipping for orders placed as late as 8 p. m.
MrThomasJonesy
September 5, 2025
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Eric Souders
August 17, 2025
I bought the 30-0334 for my 15 Silverado L83. I also run HPTuners. That being said the simplicity and ease of this OBD2 WB is like no other. Just plug and play really. Plus it’s the fastest WB I have used. Hardest part for me was getting the correct size Fuse splitter. No fault of AEM I wasn’t aware my truck has 2 different size mini fuses. The fact I didn’t have to run a bunch of wires and it has pass through OBD2 sold me. Only wish it were a little cheaper but hey.. the price you pay to be lazy! Lol
Kbr1997
July 31, 2025
Working as intended
Daniel Elias
July 22, 2025
Very good gauge. Coming from an innovate gauge that gave me nothing but problems, this seems to be much better operation and quality. I received mine damaged but Amazon shipped a replacement the very next day. Don’t look at any other AFR gauge.
Thomas Holden
July 12, 2025
Reads my air fuel ratio
Mx Guy
June 1, 2025
I love this wideband. exceptional response time and calibration accuracy out of the box. You can free air calibrate it as it ages. Easily connects to my HP tuners by piggybacking on the OBD port and adding it as a can-bus device on your cars network. AEM has a video on how to set it up. This is a great option for folks running HP tuners standard since it doesn't require the analog inputs to log wideband data on newer vehicles. Also no need to worry about ground offset errors when using it in this manner. Its versatile though, you can also connect via older methods (0-5v analog and serial) if you have an older vehicle. It can display digital values in lambda but the analog scale around the perimeter of the gauge is only in AFR.I've marked it down 1 star because i feel its incomplete without the availability or inclusion of a lambda faceplate overlay (should be the default faceplate in this age of ethanol and blended fuels). AEM does sell a silver/white faceplate for it that they label as "AFR/LAMBDA" but they are in-fact labeled only in AFR... which of course is only a real value if you are running ethanol free gasoline. Its a small detail though because I really don't care about the scale around the perimeter, I only care about the digital number displayed in the center, and it reads correctly when set to lambda. Also it is missing the wires/pigtail from the plug that are required if you want output analog data... so you have to source the correct wire, pins and crimp tool if you want to output analog or serial data.
HECTOR
April 6, 2025
FAST SHIPPING
mike
March 7, 2025
Product came in AEM box, but the sensor that was included did not match the pictures, and is not marked as a Bosch sensor anywhere. Pretty sure it’s a counterfeit sensor. Seems to be a common problem with a quick internet search.
Tyson
March 2, 2025
Works great, no issues after a year. would recommend buying the AEM stainless bung with it. Its worth the extra money
Shawn lapaine
February 7, 2025
Also ordered it with another mount ðŸ‘
Kevin
February 1, 2025
The first one I ordered had the "inspected" seal on the box but when I opened it there was not OBDII cable. Which is literally what makes this model (30-0334) more expensive than the others. So sent it back and after a bit of a wait the second arrived and Im happy to say all the parts are here. Just need to install my headers and I will update with the sensors actual performance.
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