Air Fuel Ratio Gauge with O2 Sensor, Digital Display 2-in-1 Air Combustion Meter

60 reviews for Air Fuel Ratio Gauge with O2 Sensor, Digital Display 2-in-1 Air Combustion Meter

1. Chantal WareVerified Purchase

   Rated 5 out of 5

   I have been looking for a AEM wideband AFR gauge for a while now and i finally saw this on Amazon for an awesome price. They usually go for more than ...More

   I have been looking for a AEM wideband AFR gauge for a while now and i finally saw this on Amazon for an awesome price. They usually go for more than $200. This gauge works perfectly and is an authentic AEM gauge. It comes with 2 gauge face colors, black n white, and it includes all wiring needed for installation and easy to follow directions.
   Ayah MendozaVerified Purchase

   Rated 5 out of 5

   My tuner recommended this wide band so he could see how things were running at cruise and WOT. The installation was simple and straight forward. I did...More

   My tuner recommended this wide band so he could see how things were running at cruise and WOT. The installation was simple and straight forward. I did have to disassemble the harness from the O2 sensor to pass it through the hole I drilled in the firewall, but it went back together without issue largely. I did have a pin get pushed out which caused the meter to stick on 14.7, but I found where it backed out because I didn't put it back in all the way. After fixing that, it's been great. I am also using a SCT fire wire connection to log the data and everything has worked beautifully.
   Bethany MohammedVerified Purchase

   Rated 5 out of 5

   AEM is a well known company in the car world, and makes high quality products. I purchased this gauge to monitor my AFR and log for open source tuning...More

   AEM is a well known company in the car world, and makes high quality products. I purchased this gauge to monitor my AFR and log for open source tuning purposes. Installation was painless and took roughly 20 minutes since my downpipe already had a bellmouth o2 bung. I strongly recommended that you buy an add-a-circuit fuse kit (ASIN B01LFXA5UA) if you don't have any, it will make installation much easier so that the gauge can be powered by one of your car's powered circuits, like the radio. I had a few spares laying around, so I spliced this gauge and a boost gauge to one fuse kit without any problems. The kit also comes with several butt splices although one would suffice. The cables for the gauge are extremely long, so be aware that you must have adequate room to tuck them away. I paired this gauge with an AEM boost gauge (ASIN B001DX7KMY) and SMY Dual Gauge Cluster (ASIN B01M7MEKUS). The numbers are also very readable in the day time and stand out in the night, although the sweeping color band is a bit washed out during the day but still visible. No issues with this gauge and I'm very pleased! The AEM sticker that came in the box was a bit damaged, so I only gained +4 HP instead of the expected +5 HP.
   Adelle BenjaminVerified Purchase

   Rated 5 out of 5

   After install this gauge in my 91 Miata turbo to monitor the air/fuel ratio it only worked for few mins then it went to full lean that gauge showed "-...More

   After install this gauge in my 91 Miata turbo to monitor the air/fuel ratio it only worked for few mins then it went to full lean that gauge showed "---". I contacted AEM customer support and Matt Cruz pickup my email and walk me through the diagnostic steps to troubleshot and find out the gauge is defected and I received a brand new gauge set with FedEx return label the next day. Now AEM will be the first merchant I go to for my cars performance electronic needs. Highly recommended.
   Nazia MustafaVerified Purchase

   Rated 5 out of 5

   Exactly as described. New style Bosch o2 sensor seems to be a bit more accurate. Also has a light exposure "eye" that adjusts the display brightness s...More

   Exactly as described. New style Bosch o2 sensor seems to be a bit more accurate. Also has a light exposure "eye" that adjusts the display brightness so its not blinding at night or dim in the sun. AEM has always treated me right.
   Jessie WebbVerified Purchase

   Rated 5 out of 5

   This has worked great on my race car for several weekends. Love the fact that it does not need to be calibrated in clean air like some others. I have ...More

   This has worked great on my race car for several weekends. Love the fact that it does not need to be calibrated in clean air like some others. I have 2 Innovate Motorsports Wideband gauges on other cars and they seem to constantly need to be re calibrated and to do that on them you have to remove the O2 Sensor and that can take 20 minutes. The next one I buy will be a AEM.
   Persephone AyersVerified Purchase

   Rated 5 out of 5

   As always it was delivered in true Amazon fashion, nearly before I ordered it. The gauge response time is almost non-existent, it's so fast. In fact i...More

   As always it was delivered in true Amazon fashion, nearly before I ordered it. The gauge response time is almost non-existent, it's so fast. In fact if I have any complaint, it is the LED needle is way too responsive, it needs to be dampened a little so it is more apt to display an average, but with a short decay time. Other than that I am 100% pleased and look forward to using it when I add the turbo. Thanks again Amazon, and of course AEM for their superior, yet affordable products. <:/)
   Terrence QuinteroVerified Purchase

   Rated 5 out of 5

   Purchased this gauge so I could install an AFR sensor for my piggyback ECU to monitor and adjust, I had high hopes for the price point and was not dis...More

   Purchased this gauge so I could install an AFR sensor for my piggyback ECU to monitor and adjust, I had high hopes for the price point and was not disappointed. The 4 face configurations is really neat and love the fact it came with white ones to match my interior (as shown, sorry for the crappy panoramic photo). The sensor wire, and the gauge wire to the sensor were both plenty long, and wiring in the power wire was super easy, it also includes a monitor wire (like use for the ECU) and a serial wire on the power line pin connector. Overall I am very satisfied with the quality and performance of it, the readings are instant (it changes with the slightest chance in throttle so virtually instant). Would buy again without a doubt! Also includes very detailed instructions which was super convenient.
   Deniz PeckVerified Purchase

   Rated 5 out of 5

   Excellent!
   Antoinette AbbottVerified Purchase

   Rated 5 out of 5

   Excellent purchase and service, extended time of insurance to purchase dor and worth it because what the packet was next to arrive