[Emry]

I found this upstream oxygen sensor on eBay.

They sell a pack of 2 for $40. But I wonder why it comes with lose wires. Should I buy this or go with a more expensive Bosch $90?

If I buy this how do I connect the wires to the existing one?

 

[scotts13]

- It comes with loose wires because you're supposed to cut the wire and connector from your existing sensor and splice this one on.
- Personally, I wouldn't buy it at gunpoint.
- By following the instructions that come with it, of course.

 

[ylwagon]

Pretty chincy looking O2 sensor, if you ask me. $20 each says that they probably don't work, or won't last long if they by chance do.

 

[2kpassat1.8t]

I think you would be better off burning your $40 and keeping the existing sensor, even if not working, than installing that thing. I thought there were five wires coming from an AWM front sensor, six pins at the connector. ATW and AEB have four. Either way, the engine management relies on that sensor, you really should go with Bosch.

 

[sirwired]

That sensor looks horrible; like something that you'd use on a lawnmower, if a lawnmower had an ECU. Go with the Bosch 15733 if you want to save some money; it includes a real splice kit that is going to be a lot more reliable than generic butt splices without heatshrink tubing.

 

[Emry]

OK you all convinced me to buy a Bosch sensor. It's not worth the hassle to buy these cheap stuff. :bowdown:

 

[Emry]

Go with the Bosch 15733 if you want to save some money; it includes a real splice kit that is going to be a lot more reliable than generic butt splices without heatshrink tubing.

OK as far as I could see this 15733 has 4 wires and I read that Passat sensor has 5. Is this correct?

 

[2kpassat1.8t]

15733 is downstream. It does have four wires, but I think what you're looking for is upstream, based on your other thread

 

[Electron Man]

Do a little more research to determine which Bosch number your O2 sensor is (for AEBs, front is 15026, rear is 13842), then search for the lowest price for a given 5-digit Bosch number. I got mine ($49 ea.) from an ebay seller who bought a bulk quantity of both sensors.

 

[T_Clark]

$90 sounds pretty good. I just checked and the sensors for my 2003 1.8 tubo Passat wagon are $128 and $135 each from Advance Auto.

 

[Emry]

I bought one on Amazon for $84 yesterday. This was the lowest price I could get for an upstream sensor. Perhaps the eBay ones are cheaper but I chose not to trust their quality and paid more. Given the age of the car this will be a one time expense.

 

[1999passat_glx]

Do a little more research to determine which Bosch number your O2 sensor is (for AEBs, front is 15026, rear is 13842), then search for the lowest price for a given 5-digit Bosch number. I got mine ($49 ea.) from an ebay seller who bought a bulk quantity of both sensors.

I'm pretty new to VW cars, so not sure if AEB is an engine code similar to AHA, but I think you have the part numbers backward. Bosch's website says the 13842 is the upstream (both fronts) and the 13550/13552 are downstream (back)... I also just changed my passenger side one not even an hour ago; I came to the forums for a DIY on the driver side, and saw the post.

On a related note.. Bosch says there's a left & right rear sensor, hence the two part numbers above, but only one model for the fronts. Is that correct? Or does Bosch have their stuff backwards??

 

[Emry]

I'm pretty new to VW cars, so not sure if AEB is an engine code similar to AHA, but I think you have the part numbers backward. Bosch's website says the 13842 is the upstream (both fronts) and the 13550/13552 are downstream (back)... I also just changed my passenger side one not even an hour ago; I came to the forums for a DIY on the driver side, and saw the post.

On a related note.. Bosch says there's a left & right rear sensor, hence the two part numbers above, but only one model for the fronts. Is that correct? Or does Bosch have their stuff backwards??

Changing the downstream sensor is really hard. I'm trying it for a couple of weeks now with no success.

 

[2kpassat1.8t]

AEB and AHA are very different, one is four cylinder, while the other six, thus the two banks (sides).

 

[1999passat_glx]

Haha! Yeah.. I'd say there's a slight difference between the two, then. Thanks for clearing it up!

 

[gigi123]

The 4 cylinder engine has less wires on the oxygen sensor, it's normal for the 6 cylinder engine to have more wires to accommodate the extra cylinders!!!

OK, just joking, it's not true.

The sensor in the first pic doesn't just look cheap, but it's the incorrect part altogether. Just not enough wires!

 

[hotfoot]

The pic is a standard universal four wire sensor - two wires actually operate the sensor, the other pair are for the built in heating element (some cars have it, some don't). It's a for multi-applications, hence why you cut and splice.

 

[gigi123]

Plenty of info here

Oxygen Sensor Types and Function | Walker Products

As one can see, the "wideband" shows a VW sensor... Not the same as your regular 1,2,3 or 4 wire sensor... Different functionality and design.