Spot the FAKE

Which sensor do you think is fake and which is OEM

$137 Denso 234-9001 Upstream Air Fuel Ratio Oxygen Sensor with 10.6” 4-Wire Harness, for Auto Trans Equipped Vehicles

Denso 234-9001

 

Left

 

right one seems like it's the non-OEM

 

What led you to this conclusion?

 

Trick question, they are both fake

 

Left is most likely given that all the legit sites like Autozone are showing the right one.

That also said, it's not uncommon to have both retail (right) and wholesale (left) packaging for some automotive parts - especially those where the manufacturer likely sells the part under several names and under the OEM tag. The outer shell piece isn't an indication of fake or real and will have little impact on the functionality of the sensor.

 

WRONG One is a genuine oem

$137 Denso 234-9001 Upstream Air Fuel Ratio Oxygen Sensor with 10.6” 4-Wire Harness, for Auto Trans Equipped Vehicles

Denso 234-9001

 

inconsistent coloring, small/few holes, more exposed wiring. Also the box on the right doesn't seem like an OEM box.

But it's just a guess.

 

So you are saying the sensor on left is fake. But you may get a genuine Denso in a box like the left.?

 

If you search the part number, Autozone shows a part that looks like the right and parts are more regularly coming in commercial packaging (also right) at places like that where a customer is buying them. The packaging on the left is also common and may be old or may be for a wholesaler to sell to shops to keep on hand.

All I'm saying is that it's possible they're both real but the right side one is either a great fake or more likely real.

 

Right is a flake, not fake. Haha. Denso should have 4 - 4 vertical hole, not 4 - 2 vertical hole.

 

Does anybody know WTF Denso fuel/air sensor is SUPPOSED to be for a 99 2.7? I believe I have been duped on EBay. I heard that 99 is tricky and two different sensors were used. I really would love to know what belongs in this friggen thing.

 

1999 4wd 2.7L Sensor 1 upstream Denso OE #

$52 234-4162 Oxygen Sensor with 4-Wire 10.5” Harness for Non-California, Non-4WD Lexus/Toyota

234-4162 OR Universal#

$56 234-4206 Oxygen Sensor

234-4206 Sensor 2 downstream-automatic transmission Denso OE#

$59 234-4153 Oxygen Sensor

234-4153 Manual transmission Denso OE#234-4162 OR universal #234-4206

@Rachelsdaddy

 

O2 sensors have 4-4 air/fuel ratio sensors have 4-2 +1 bottom hole

 

#

$52 234-4162 Oxygen Sensor with 4-Wire 10.5” Harness for Non-California, Non-4WD Lexus/Toyota

234-4162 for auto? And how certain are you? Don’t care about downstream. Thank you

 

Is it an a/f ratio sensor or is it an O2 sensor. I swear I got the wrong thing in there. Please oh please just tell me what is supposed to be in there. So confused

 

$52 234-4162 Oxygen Sensor with 4-Wire 10.5” Harness for Non-California, Non-4WD Lexus/Toyota

234-4162 is an O2 sensor for auto or manual trans 2.7L 4wd. There is no OE part # for air/fuel sensor in 1999 Tacoma

 

Thank you so much. I WILL find one of these friggen things.

 

*Gasp! Wait. Is there a difference between 2 and 4 wheel drive? Cuz “technically” my PreRunner is 2 wheel drive. Has this been my problem? Certainly the ecm’s are different between the two.

 

99 does not have an air/fuel ratio sensor - just O2 sensors.

No difference for upstream (for the downstream sensor, YES there is a difference). See below. Upstream for the 2WD 2.7L is the same for either OE Style or their Universal. I would go with the OE style P/N. So, grab it from:

$52 Denso 234-4162 Oxygen Sensor with 4-Wire 10.5” Harness for Non-California, Non-4WD Lexus/Toyota

https://smile.amazon.com/Denso-234-4162-Oxygen-Sensor/dp/B000C5UFK8/

Prime item, can't go wrong.

Part reference source: http://densoautoparts.com/find-my-part.aspx