RANT!!! PSA for anybody buying an aem wideband

96pushrod

I think they're a little easier to get off
May 15, 2018
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584
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Savannah
So I usually run an aem wideband in most everything we do, usually a 30-0300 or a 30-4110. The past couple years I’ve seen the supplied sensors fail 3 different times. Twice on my cars, and once on a ls truck we built in the shop. Each time they’ve been replaced with a parts store Bosch 17025 and they work great for years.

So this last time, I had a aem gauge actually just quit working. I’d had it for years so I just replaced it with another. I reused the 4.9 sensor (the parts store one) since it worked well and had the supplied aem 4.9 in the box. About a month ago, that parts store 4.9 failed (which it had lasted a few years) so I swapped it out with the supplied aem sensor. That sensor lasted all but 2 hrs and then quit on me.

So naturally I was pissed and I emailed aem about the failure. I called them out that this had happened several times, and only with their supplied sensor. They mailed me a replacement one. Which lead me to what I discovered today.

I believe they’re shipping knock off ones in some of their kits.

Every single aem wideband we’ve ever purchased had came directly from summit racing (or atech, the summit wholesaler), I have POs for all of them.

If you buy an aem sensor, make sure it looks like this, which was the replacement they sent me:


2D0A229F-C2C8-43EE-BB2F-972B94C0E7E3.jpeg

And not this, which was the one that came with the 30-0300 kit:

A15D7642-D3BA-4860-95BB-25F2542E115D.jpeg

Let me know what you guys think. Anyone else seen this?
 
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Essn95

Advanced Member
Jun 21, 2017
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Good to know, I was looking to buy a wideband for my cts-v to get it tuned. Do you happen to have extra gauges laying around before I buy new?
 

LX Dave

Active Member
Jul 2, 2017
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This is interesting, I have an AEM gauge from a few years ago that was bought at Summit Racing. Here's what it came with.
20210415_195905.jpg 20210415_195922.jpg

Kind of looks like a no name with a Bosch sticker on the wire, and none of the numbers match. It's worked good for a couple of years now. I saved your picture for reference when this one dies on me. Thanks.
 

96pushrod

I think they're a little easier to get off
May 15, 2018
961
584
103
29
Savannah
Good to know, I was looking to buy a wideband for my cts-v to get it tuned. Do you happen to have extra gauges laying around before I buy new?
I don’t have any extras. I still like the aem widebands, and maybe they got a garbage batch of sensors from a supplier. Who knows. I know the replacement sensor they sent me is a legit Bosch 4.9, so I’m sure it’ll be good.

I actually did email Bosch with a picture of the one that failed, and the rep said it appeared to be fake, but also said it’s tough to come to a for sure conclusion. He also mentioned there isn’t always the Bosch logo on the body, but it’s not as common since these are usually ordered in bulk from major auto manufacturers, so they can have their own part number on them. He also said he’s not used to seeing them without the purplish heat mark either.


LX - that’s actually a similar number that I’ve seen on 4.9 sensors before.
 
Apr 16, 2021
2
2
13
48
Hawthorne, CA
This is interesting, I have an AEM gauge from a few years ago that was bought at Summit Racing. Here's what it came with.
20210415_195905.jpg 20210415_195922.jpg

Kind of looks like a no name with a Bosch sticker on the wire, and none of the numbers match. It's worked good for a couple of years now. I saved your picture for reference when this one dies on me. Thanks.


Hi AEM Electronics here – this thread was brought to our attention and we wanted to chime in. All AEM Widebands come with Bosch sensors. Over the past few years there have been gaps in supply from Bosch which forces us to source our sensors on the global market where there are times the sensors come from Bosch Distributors with different color heat shielding (blue or black) on the harness or where the o2 sensor body is buffed…and in some cases the o2 harness length varies. But, the sensors are all confirmed to be OEM Bosch.

I noticed that you mentioned purchasing from Summit/Atech who is a good direct customer of ours, so the concern of those gauges or sensors being counterfeit should be dismissed (note: our gauges and some of our other products have been counterfeited please visit here for more information): https://www.aemelectronics.com/dealer/beware-counterfeit-aem-electronics

I’m not sure what’s going on in this case with the shortened life of the sensor (any major tune changes or fuel?), but if you like, we can get your gauge back to us for testing to confirm all is working to spec. We will waive any inspection fees…and just a reminder, if you do choose to do so, please pull the good o2 sensor out and install a bad sensor or o2 sensor bung plug. Leaving in a good sensor while not powered up with almost certainly foul the sensor due to the heater element not functioning while the gauge is out.
 
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96pushrod

I think they're a little easier to get off
May 15, 2018
961
584
103
29
Savannah
Hi AEM Electronics here – this thread was brought to our attention and we wanted to chime in. All AEM Widebands come with Bosch sensors. Over the past few years there have been gaps in supply from Bosch which forces us to source our sensors on the global market where there are times the sensors come from Bosch Distributors with different color heat shielding (blue or black) on the harness or where the o2 sensor body is buffed…and in some cases the o2 harness length varies. But, the sensors are all confirmed to be OEM Bosch.

I noticed that you mentioned purchasing from Summit/Atech who is a good direct customer of ours, so the concern of those gauges or sensors being counterfeit should be dismissed (note: our gauges and some of our other products have been counterfeited please visit here for more information): https://www.aemelectronics.com/dealer/beware-counterfeit-aem-electronics

I’m not sure what’s going on in this case with the shortened life of the sensor (any major tune changes or fuel?), but if you like, we can get your gauge back to us for testing to confirm all is working to spec. We will waive any inspection fees…and just a reminder, if you do choose to do so, please pull the good o2 sensor out and install a bad sensor or o2 sensor bung plug. Leaving in a good sensor while not powered up with almost certainly foul the sensor due to the heater element not functioning while the gauge is out.
I’m glad you guys chimed in. The tune on the car has pretty much never changed, at least not in the last year and a half. Car has always been consistent and always just ran on regular unleaded gasoline

I’ve really never had any sort of issues with the gauge itself, just the sensors. I had one gauge fail, but it was after a couple years so I really didn’t care about that.

Doesn’t it seem odd somebody would buff off the only thing that actually identifies the sensor? Especially on a manufacturer where there is so many people making fakes.

If you guys want the old sensor back you’re welcome to it. I had just planned on tossing it in the garbage.

Anyways, this isn’t a “:leghump: aem” post or anything like that, because frankly I’ve always liked the products I’ve bought from you guys - and I’ll continue to do so. I just saw a trend and was curious what others have experienced.
 
Apr 16, 2021
2
2
13
48
Hawthorne, CA
I’m glad you guys chimed in. The tune on the car has pretty much never changed, at least not in the last year and a half. Car has always been consistent and always just ran on regular unleaded gasoline

I’ve really never had any sort of issues with the gauge itself, just the sensors. I had one gauge fail, but it was after a couple years so I really didn’t care about that.

Doesn’t it seem odd somebody would buff off the only thing that actually identifies the sensor? Especially on a manufacturer where there is so many people making fakes.

If you guys want the old sensor back you’re welcome to it. I had just planned on tossing it in the garbage.

Anyways, this isn’t a “:leghump: aem” post or anything like that, because frankly I’ve always liked the products I’ve bought from you guys - and I’ll continue to do so. I just saw a trend and was curious what others have experienced.
We appreciate your support! PM me with your email address and we will send you a call tag to ship the sensor. We would like to see it. As for the buffing, we agree that it is strange and can’t explain the “why”, but can say that “what” we put in our kits is OEM Bosch.
 
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LX Dave

Active Member
Jul 2, 2017
170
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LX - that’s actually a similar number that I’ve seen on 4.9 sensors before.
That's good to know.
Hi AEM Electronics here – this thread was brought to our attention and we wanted to chime in. All AEM Widebands come with Bosch sensors. Over the past few years there have been gaps in supply from Bosch which forces us to source our sensors on the global market where there are times the sensors come from Bosch Distributors with different color heat shielding (blue or black) on the harness or where the o2 sensor body is buffed…and in some cases the o2 harness length varies. But, the sensors are all confirmed to be OEM Bosch.

I noticed that you mentioned purchasing from Summit/Atech who is a good direct customer of ours, so the concern of those gauges or sensors being counterfeit should be dismissed (note: our gauges and some of our other products have been counterfeited please visit here for more information): https://www.aemelectronics.com/dealer/beware-counterfeit-aem-electronics

I’m not sure what’s going on in this case with the shortened life of the sensor (any major tune changes or fuel?), but if you like, we can get your gauge back to us for testing to confirm all is working to spec. We will waive any inspection fees…and just a reminder, if you do choose to do so, please pull the good o2 sensor out and install a bad sensor or o2 sensor bung plug. Leaving in a good sensor while not powered up with almost certainly foul the sensor due to the heater element not functioning while the gauge is out.
Only replying because you quoted my post. I used this current one for a couple of years with no problems, for tuning my truck. Currently, it's not installed in anything, kind of waiting for the next project.
 

ThinBlue502

Advanced Member
May 7, 2019
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Ohio
We appreciate your support! PM me with your email address and we will send you a call tag to ship the sensor. We would like to see it. As for the buffing, we agree that it is strange and can’t explain the “why”, but can say that “what” we put in our kits is OEM Bosch.
I always used another manufacturer’s product over AEM on previous cars. My only problem with the other product was customer support. I’ll be switching to your product just because of your actions. Thank you.
 
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Steel1

Mustang Master
Aug 18, 2017
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I ran an AEM wideband for over 10yrs. on my 93GT , although not a daily driver, I never had any issues with it.
I've since sold the car so can't verify what is stamped on the sensor.