Amazon O2 Sensor Review: Gledwen vs. Bosch LSU 4.9 for AEM X-Series

I didn't expect much from the Gledwen replacement O2 sensor I ordered on Amazon, but it pleasantly surprised me with its performance. I'm always on the lookout for cost-effective parts, and it seems like we might have discovered a budget-friendly alternative to the AEM Bosch replacement O2 sensor.

#amazon #o2sensor #cheap

LSU 4.9 O2 Oxygen Sensor AEM X Series AFR

[TPVPRO]

LSU 4.9 O2 Oxygen Sensor AEM X Series AFR

[lordandprotector]

If you want to compare the accuracy of a sensor, to the official BOSCH, here is the procedure:

For each sensor:

1. Remove the sensor from the exhaust. Place in open air.
2. Set the gauge to 4-digit mode
3. Set it to display O2%
4. Set it to RCal mode. ( this does not work, if you do a "free-air-cal" )
5. Note the O2% reading, for each sensor.

Depending on your altitude/elevation, you should see a reading of about 17% to 21%. If both the BOSCH and aftermarket sensors agree on the %, then you have a functional sensor.

The readings at idle ( around 14.7 ) are meaningless. 14.7 AFR is "Zero" for a wideband. It's like testing a voltmeter's accuracy by measuring 0v.

I hope these budget sensors work out. Even if they last 1/2 as long :)

[JoeSimpsonAtTempest]

the real budget option is to pick up a balanger motorsports wideband with NTK sensor for $350. the NTK sensors last significantly longer and hold up 1000% better to leaded fuel. few more dollars than the aem up front but will save a ton of money in the long run.

you were a few houses away from driving by my moms house 🤣

[shukiramobley]

I have used the cheap ones in a DA integra tuned on a hondata s300. I replaced the sensor twice in 4 years. I put one into an H22 accord recently and it didn't even last 6 months. I just today put up the $$$ for the real deal. I just hope to get at least 5 years out of it.

[evo]

Thank you for your tech info ……. Sorry to see you leave the Nitrous guys behind your tech on that was great.

[stevesmith]

I haven't replaced a cheapie or bosch since I stopped waiting for it to warm up before starting. I read online that fries them faster.

[paulksycki]

It's the O2 controller you have to watch out for. The CJ125 chip is being counterfeited by China and it is very hard to find a real Bosch chip. But it is possible the knock off chips could be better. The real chip design isn't that great, my concern for it would be the chip reading much different on a hot drag strip. All semiconductor stuff having performance swings over temp swings. But I have not tested to verify my concerns. I just built my own controller circuit instead. My channel has a video of me explaining the whole Bosch chip internals.

[yod]

usually the difference will be noticable when slowly picking up speed lower rpms it wont be so accurate and it will feel slugish compared to the bosch which mesures precisely

[scottykilmer]

once i bought a cheap oxygen sensor from amazon, and the car ran like crappp
but it was not noticeable immediately, after driving for a week the car became extremely sluggish.
After fitting the Oem part the car became alive.

[michaelmaher]

great info. You be da Oxy Jen Sinnsor Kang I'm looking foward to the boost info you 'bout to start slangin, Keep it gangster dog, keep it gangster

[shanebarrett]

Do you prefer the Aem over your old autometer wideband?

[jo-qpmz]

I didn't even know they made a cheap one. The next wideband I get is going to be the combo 02 and boost

[hotrodswoodshed]

I'm wondering, since four months, Is the amazon oxygen sensor still performing?? I have a authentic AEM 30-0300 unit that been working fantastic for 3 years. But im considering trying the knockoff ebay/Amazon $80 lookalikes to see if they preform equivalent to my AEM. what's your take/opinion on this?

[CarportGarageDragRacing]

I have tried the cheap ones and the more pricey ones, and do not see a difference, neither last very long it seems, I am lucky to get a year out of either.

[MikePianoMan]

Well no one's stealing that car lol

[jeffgood]

That gauge sure cant display worth shit

[sarin]

I wouldn't buy any of them. Denso or bust 👍

[FixItStupid]

Good Tech . To Know ! Save $$$ On o2 Is Right ON TY Sir