Never worked, bad o2 sensor with either too lean at idle (afr +17) or too rish with boosting (afr 10 and below)

Trashed the first sensor in a week then had to send the gauge into AEM for warranty, it just flashed all over the board

had a sensor either dead out of the box, or it lasted a week

Second sensor was defective

Ok so the sensor worked great for about 5 months,

I swapped the bad sensor with a Bosch 17212 from the local parts store

the sensor that comes with the guage is crap, and will literally fly around between 1 and 16 while driving, my advise like many others who got this guage is to get a quality Bosch o2 sensor, the guage is worth the money but its sensor is, well, crap

Gauge works fine but came with a faulty sensor doesn’t work

O2 Sensor was bad right out of the box

The 02 sensor failed after 2 days.

I plan on doing some more testing tomorrow but it currently seems as if I have a faulty sensor, out of the box

Contacted AEM support and we diagnosed the 02 sensor had gone bad and needs to be replaced

the sensor died after a few months of use, no way to ask for compensation.

so it burns a little bit of oil, also sensor comes out very clean when replacing it, no oil residues or contaminants, it's just a poorly made expensive sensor, will not buy this again.

Like many other reviews, my sensor is dead on arrival

Gauge is nice sensor failed with in around 2

The sensor is absolutely trash

Do yourself a favor and buy the gauge without the sensor then get a true genuine Bosch sensor.

Does work good now but they need to solve the bad sensor problem

clean the sensor before you put it in, they package it with grease and it was messing up my readings

Ok so I ordered this 2 times and both times the sensor was garbage

Sensor bad out of box on two of them

Innovate burnt out 2 02 sensors in the first 3 month that I had it

Their faulty sensor didn't look anything like the Bosch sensor, yet they advertise it as having sensors by Bosch.

Sensor went bad after just 2 months

Came in missing the o2 bung and faulty sensor

Received and wired everything up, found sensor was dead

It arrived with a defective cheap sensor that didn't even work

Did they put all the bad sensors together with a mix of good ones and try to dump them using Amazon

My sensor that was provided was working for about 30 seconds then completely died

Terrible product!!Sensor doesn't work right out of the box, if you want it replaced you have to jump through hoops with aem to get it.

The ones I just bought got 2 bad oxygen sensors out of the box that makes we wonder if they have gone down hill since than.

My sensor was also bad

The Sensor failed the third time I cranked the car.

This gauge, the 30-4110, is using cheaper chinese sensors

Others have mentioned the 02 sensor it comes with being crap, but I haven't had any issues with it.

Faulty sensor within a week

The sensor it came with was broken right out of the box

Indicating bad sensor

The advertized that it came with a genuine Bosch sensor.

The sensor was bad right out of the box.

and then the sensor quit working

sensor doesnt work had to buy a new one

The sensor will most likely go bad

Like many other reviews, my sensor is dead on arrival

Everything worked well for about a solid week, then the sensor went out, waiting to see if they’ll replace it for me or not, I was asked for the following:Full name, Email,Phone, Shipping Address, Part number, Serial number, Receipt: (pdf/

So Both the sensor and the guage were probably bad.

Sensor came dead on arrival, it isn't a real bosch sensor

A sensor came defective and even said it on the sensor

5/5 stars except for the bad sensor

The sensor seems very reliable and you can always purchase it separately if it goes out.

Sensor is bad out of the box, for the first few days it would slowly goto full lean and now it stays at 14.7 after startup

I received a faulty wideband sensor.. did all the testing and sensor reads between 15-16

All signs pointed to bad sensor

Should have done better research, this 4.9 sensor with a resistor for calibration is frequently replaced and found not working right out of the box.

The sensor no longer works after 3 days

The first gauge went fully lean no matter what I did, requested a replacement through amazon and the new sensor had exact same problem after 5 minutes of the car running

The sensor was crap right out of the box just like everyone else experience on here

First off, talked to AEM after receiving knock off sensor

But 3 days into install the sensor failed & AEM does not warranty the sensor

O2 sensor is not engraved like the original Bosch

Based on the tech department's speech and reasons for failed sensors maybe they were not designed for exhaust systems on cars.

CHEAP CHINESE KNOCKOFF SENSOR

Pretty sure the sensor is a fake, bosch o2 sensors have the part number on the connector and say bosch on them somewhere

Gauge works, lights up and all that, but came with a bad sensor.

Welp my 02 sensor was faulty right out of the box

1st sensor was defective, Amazon sent me a replacment unit

They farmed out the sensors to an overseas maker to make more money and it didn't work out

Contacted AEM, they said more likely I got a faulty sensor, I ordered replacement

Used for a day and the sensor went bad, got a replacement for AEM and same deal

a known good sensor and it

(they have good sensors and only fit the 30-4100).

but I'm not sure why the sensor I got was damaged lucky for me that I have another senor with the 6 pin to replace it

Sensor did not work out of the box

Spent hours this weekend installing this only to realize the display is stuck on 14.7 indicating faulty sensor.

02 sensor was broken out of the box, then comes the replacement the 02 sensor worked for about 10 minutes on KY way

the sensor that comes with the guage is crap, and will literally fly around between 1 and 16 while driving, my advise like many others who got this guage is to get a quality Bosch o2 sensor, the guage is worth the money but its sensor is, well, crap

The sensor that comes with this kit has a part number but its not bosch and doesn't say bosch anywhere.

THE RIGHT 02 SENSOR

They verified that the sensor is bad but won't do anything about it.

Also don’t think they send an authentic Bosh sensor

Sensor went bad within a month, couldn't return because the return window had closed

IF your car is slightly rich you will foul the sensor and you will have to buy another wideband unit.

Performed sensor test to determine that sensor was bad

I am hoping AEM will replace the bad sensor under warranty.

I suspect the sensor is the issue

Before I install the sensor I tested it using the brake parts cleaner method and it worked

Faulty sensor, wrote customer service and no reply...

I paid them and shipped it to them (at my expense), and waited over a month before they sent me an email claiming there was nothing wrong with it and they were shipping it back, blaming my o2 sensor

Seems to be pretty common that these sensors are faulty out of the package

first!If you want to spend $160 and throw the dice that your sensor will be good, then be my guest

Wire up and installed by the book could not get it to read burned up every sensor I put on it

then after about 6 miles of driving the gauge just started showing --- seems this sensor has failed as well

The sensor died within a month

Great Product, have heard mixed reviews on these cheaper AFR sensors but it seems to be ok

The sensor was defective right out of the box

Failed oxygen sensor right out of the box

They did not refund my money or respond to further emails about the issue when I asked them to explain themselves or offer me a 'good' o2 sensor if they were going to insist every one I bought was bad