I have the correct O2 sensors for the D1 with factory connectors. But I am having a hell of a time figuring out how to gain reasonable access to the connection sockets for the two upstream sensors. They are both above the bell housing and I might be able to squeeze a hand in for the left side, but the right side seems like I might need to remove the coil pack or more to reach it.

Anyone successfully replaced their upstream sensors, and if so were you able to get to the sensor connections and how?

I don't want to take the splice route.

Thanks!

 

Take out the coil packs,climb on the engine and reeeaaach!

 

I managed to remove the leads from the coil pack and reach the driver's side... was tight but I managed. I also had to take it in to a muffler shop to get a torch on the driver's side O2 sensor as it was not budging, even with lubricant to loosen it. That was $35, but worth it!

Passenger side was able to reach from below and snake my hands up... make sure engine is cold, and wear safety glasses as dirt and debris will fall on your face. That one is more by feel than anything else

 

Kinda seems like that will be necessary. Well, I am also swapping out plugs and wires, so I'll be in there anyway.

 

I'll try that first and default to removing the packs if it doesn't work. Hoping they don't require the torch!

 

I was hopeful, but the darn O2 sensor on the driver's side was a PITA! I kept reefing on it, and the only thing that moved was me! I was also worried about stripping the nut... eventually I realized that what other people on this site mentioned about it being a PITA was correct

Best of luck!

 

you do realize he means use the torch on the sensor where it screws into the Y pipe NOT ON THE PLASTIC PLUGS ATOP THE BELL HOUSING

I also did it without removing the coils but it was a nightmare and I tore up my hands and forearms

 

Removing the coil pack is by far the easiest method. If you're scrapping the old sensor you can cut the wire and get a 6 point socket on the sensor at the bung.

 

Yes, no plans to keep the old ones. I was considering how to get a boxed end wrench on it so thanks for the tip.

Hoping removing the coil pack is relatively straightforward?

 

yup 4 nuts and the plug(s)