V10TDI O2 sensors - Club Touareg Forums
 
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post #1 of 9 Old 05-22-2018 Thread Starter
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V10TDI O2 sensors

All right I need some help with my 2004 V10TDI, Does anyone have a picture of where the O2 sensor plug into the harness? I am in the process of putting this thing back together and can not seem to locate where the Sensors plug into. The engine is in but i can't go any further because we all know how accessible they made these sensors.



A little History on this thing, I picked it up in about 2010 for the wife with only 48000 miles on it. The thing had no issues what so ever and very good records. Anyway, few years later and a divorce the exwife ends up with the vehicle and the engine blows and hasn't even hit 80000 miles. So I pick it up and have it sitting at my house when I locate a Brand New Crate engine which i am now in the process of putting in. The biggest issues is i didn't tear this thing down, the dealer did when they diagnosed the engine knock. So I have know idea where they unplugged the sensors from and can not see any connectors on the top side of the engine or body harness. I am guessing it plugs in down by the Transmission but with the engine installed I can't seem to locate where.
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post #2 of 9 Old 05-22-2018
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I'm not expert on this but I have a feeling you might only be able to replace the sensors when the engine is out which is why, when people drop their engine, they ask what else they should tackle whilst they can access things!

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From the memory banks do I recall someone found a way round this some years ago by cutting a hole in the floor?

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post #3 of 9 Old 05-22-2018 Thread Starter
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The sensors are new i just don't know where they plug into on the vehicle wiring Harness.
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post #4 of 9 Old 05-22-2018 Thread Starter
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i would post up some pictures but currently its telling me i am not allowed, guess i haven't had enough posts. I currently have the engine and trans in but barely hanging in the frame rails. the 02 sensors are installed in the exhaust and the wires are just laying on top of the engine because i can seem to find where they plug into.
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post #5 of 9 Old 05-22-2018 Thread Starter
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How it sits as of now.
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post #6 of 9 Old 05-22-2018
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The O2 Sensors get connected to both sides of the engine compartment. There is a bracket on either side, that is bolted to the chassis. The passenger (right) side connector is mounted to the area where some vacuum lines go into. The driver (left) side connector is mounted near(ish) where the underhood charging points are located. Both of the connectors on the chassis side face towards the rear of the vehicle.

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post #7 of 9 Old 05-22-2018
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Quote:
Originally Posted by 04V10 View Post
The O2 Sensors get connected to both sides of the engine compartment. There is a bracket on either side, that is bolted to the chassis. The passenger (right) side connector is mounted to the area where some vacuum lines go into. The driver (left) side connector is mounted near(ish) where the underhood charging points are located. Both of the connectors on the chassis side face towards the rear of the vehicle.
This is correct. The right side connecter is attached to the bracket that hold the EGR vacuum solenoid.

Quote:
Originally Posted by noobytoogy View Post
From the memory banks do I recall someone found a way round this some years ago by cutting a hole in the floor?
You can easily change the O2 sensors by removing the EGR and throttle bodies from either side. Once removed, they're very accessible.

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post #8 of 9 Old 05-23-2018 Thread Starter
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Thank you, I will look tonight
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post #9 of 9 Old 06-06-2018 Thread Starter
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Thank you for the help. I found the plugs, drivers side had been tucked under the power steering reservoir the passenger side was tucked up by the AC lines. It was pretty obvious when I knew the correct area to look. So thank you once again.
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