So I'm closing in on the final straight of finishing the TT build. I just need some help with the 02 sensors. The plan is to get the Z33 haltech plug and play ecu, then the dual channel wideband box.

Does anyone know do I just delete both the old upstream and downstream factory 02 sensors. Then put the new widebands a little downstream of the turbos. Basically I need to know I can delete the 4 factory 02's?

Then for the wiring for the new 02's it says they need a switched power supply. "Fused key on power source". Since the old factory 02 harnesses will just be hanging around in the engine bay with no 02's plugged into them can I just steal power from the old 02's and use it for the new ones?

Or is there a more correct way of doing it like adding a totally new separate fuse from a spare spot on the fuse block? I just figured stealing power would be a bit easier

Thanks in advance for any help

 

The power for the existing upstream O2 sensors comes from the IPDM (engine bay fuse box) so it's fine to use them to power the widebands. Should be a red wire/black stripe for later models with factory widebands.


And yes, just put the new widebands a minimum of 12" away from the turbos. Any closer ends up smoking the wiring because the exhaust pipe can get RED HOT around the turbo and melt the wires right where they enter the sensor.

 

awesome, thanks