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AEM Wideband Gauge X-series 30-0300 AFR O2 UEGO Air Fuel Ratio gauge Kit 2 1/16" - Picture 1 of 12
AEM Wideband Gauge X-series 30-0300 AFR O2 UEGO Air Fuel Ratio gauge Kit 2 1/16" - Picture 2 of 12
AEM Wideband Gauge X-series 30-0300 AFR O2 UEGO Air Fuel Ratio gauge Kit 2 1/16" - Picture 3 of 12
AEM Wideband Gauge X-series 30-0300 AFR O2 UEGO Air Fuel Ratio gauge Kit 2 1/16" - Picture 4 of 12
AEM Wideband Gauge X-series 30-0300 AFR O2 UEGO Air Fuel Ratio gauge Kit 2 1/16" - Picture 5 of 12
AEM Wideband Gauge X-series 30-0300 AFR O2 UEGO Air Fuel Ratio gauge Kit 2 1/16" - Picture 6 of 12
AEM Wideband Gauge X-series 30-0300 AFR O2 UEGO Air Fuel Ratio gauge Kit 2 1/16" - Picture 7 of 12
AEM Wideband Gauge X-series 30-0300 AFR O2 UEGO Air Fuel Ratio gauge Kit 2 1/16" - Picture 8 of 12
AEM Wideband Gauge X-series 30-0300 AFR O2 UEGO Air Fuel Ratio gauge Kit 2 1/16" - Picture 9 of 12
AEM Wideband Gauge X-series 30-0300 AFR O2 UEGO Air Fuel Ratio gauge Kit 2 1/16" - Picture 10 of 12
AEM Wideband Gauge X-series 30-0300 AFR O2 UEGO Air Fuel Ratio gauge Kit 2 1/16" - Picture 11 of 12
AEM Wideband Gauge X-series 30-0300 AFR O2 UEGO Air Fuel Ratio gauge Kit 2 1/16" - Picture 12 of 12
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AEM Wideband Gauge X-series 30-0300 AFR O2 UEGO Air Fuel Ratio gauge Kit 2 1/16"

AUTHORIZED DEALER - Full Warranty - SUPERFAST SHIPPING®
lightningmotorsports
(33650)
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US $217.95
ApproximatelyC $298.42
Condition:
New
More than 10 available4,663 sold
This one's trending. 4663 have already sold.
People want this. 2668 people are watching this.
Shipping:
Free Standard Shipping.
Located in: Baton Rouge, Louisiana, United States
Delivery:
Estimated between Wed, Jul 16 and Sat, Jul 19 to 94104
Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the shipping service selected, the seller's shipping history, and other factors. Delivery times may vary, especially during peak periods.
Returns:
60 days return. Seller pays for return shipping.
Payments:
     Diners Club

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Seller assumes all responsibility for this listing.
eBay item number:361657509780
Last updated on Jul 10, 2025 03:56:48 EDTView all revisionsView all revisions

Item specifics

Condition
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ...
Other Part Number
300300 / AEM 30-0300
Other name
wideband
Items Included
Wiring Harness, Mounting Hardware
Item Diameter
2-1/16
Color
Black
Manufacturer Part Number
30-0300
Material
Plastic
Superseded Part Number
30-4100
Vintage Part
No
California Prop 65 Warning
Cancer & Reproductive Harm
Unit of Measure
Air Fuel Ratio
Brand
AEM
Needle Color
LED Multi Color
Type
Digital Air Fuel Ratio
Interchange Part Number
30-0300, 30-4110, AEM Wideband, Wideband, 30-4100, Wideband Gauge, AEM 30-0300
Authorized Dealer
Yes
Display Type
Digital
Manufacturer Warranty
1 Year
OE/OEM Part Number
30-0300
Style
Racing
Features
Display Gasoline values from 8.0:1 to 20.0:1 AFR, Wideband Air Fuel Ratio Display
Universal Fitment
Yes
Performance Part
Yes
UPC
840879024437

Item description from the seller

About this seller

lightningmotorsports

98.8% positive feedback•104K items sold

Joined Apr 2004
Welcome to our eBay Store. Founded in 1996, we have been servicing the performance industry for well over 25+ years. Our knowledgeable staff can assist you with any project from mild mannered daily ...
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Detailed seller ratings

Average for the last 12 months
Accurate description
4.9
Reasonable shipping cost
5.0
Shipping speed
5.0
Communication
5.0

Popular categories from this store

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SHOP BY VEHICLE MAKEACLACUITYAEM FUEL & ELECTRONICSAEM IntakeAEROMOTIVEARPCOMETICCOMPETITION CLUTCH

Seller feedback (35,479)

All ratings
Positive
Neutral
Negative
  • o***0 (1282)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    I love the new design and features! I mounted it next to the tach with no mounting cup needed, just made a simple mounting bracket.
  • r***a (320)- Feedback left by buyer.
    Past year
    Verified purchase
    You need this if your serious about performance. My laptop with software was hypothetically at a good afr at WOT..My car felt great.. After installing this in my 1994 Z28 A4 car I test drove amd saw I was off a full point lean at WOT. I made the corrections needed in my VE table and you can only imagine the difference in power. IF YOU ARE OBD1 LT1 FBODY YOU NEED THIS SENSOR! EASY INSTALL ! Just remove cigarette lighter and grind the whole big enough to clear the 2 plugs and stud mounts!!!
  • -***t (92)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Great quality and fast shipping as always! Ordered 2 days ago fast shipping!! This is the 3rd one I have purchased from this seller ( I have a lot of projects lol ) amazing seller I highly recommend
See all feedback

Product ratings and reviews

Learn more
4.9
239 product ratings
  • 223 users rated this 5 out of 5 stars
  • 11 users rated this 4 out of 5 stars
  • 2 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 3 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 158 reviews
  • by tonyrt44
    Sep 16, 2021Top favourable review

    Accurate and easy to read

    I have used both 30 & 60 psi range gauges and I will never be using any other brands boost gauges. Easy to read, even in off road applications. Comes with all needed hardware for installation.

    Verified purchase: YesCondition: NewSold by: autoshopping24.store

  • by berry052
    Oct 31, 2018

    AEM 30-0300

    One of AEM's newest most recent wideband for 2018... This gauge is also on social media as 1 of top ten to choose, and I believe 2nd or 3rd in the order... I chose this for the quality of this being the first single board design and jst hobby style harnesses to plug and play to the guage... The setup is also great bc it is also a lambda and uego read on the LSU aswell... This means e85 compatible... The no obstacles that were of AEM guages of yesterday are in the past bc this opens doors for more of these guages to be standard so the harness is plug and play the guage is single board, has digital dim and blackout feature.. So many things that make this a can't go wrong choice, other than being pricey in the market; which was only thing was and I waited for a great price.. This is AEM's ...

    Verified purchase: YesCondition: NewSold by: circuitspecr

  • by dysan911
    Dec 31, 2018

    Peace of mind at a Glance!

    This is one of the best gauges for monitoring A/F because of the big red easy to read from a glance numbers as well as the parameter light that will definitely let you keep your eye on the road / track ahead and still catch a glimpse of the green light without actually looking directly at it. It's just in your line of site so you know your A/F is fine

    Verified purchase: YesCondition: NewSold by: spreetail

  • by travibaker-gome-0
    Oct 20, 2018

    Awesome product

    Works great, makes logging your car with a db9 cable very easy. Worth every penny.

    Verified purchase: YesCondition: NewSold by: circuitspecr

  • by okevin212
    May 09, 2020

    Yeah boi

    I read and followed the directions for the oxygen sensor install angle and fixed any exhaust leaks. it works great and can finally fine tune my carburetor.. I found out why one of my many carbs always got horrible mileage even with very lean jetting, the idle air bleeds were about .012" too small

    Verified purchase: YesCondition: NewSold by: tsukikagesoul811

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