O2 sensor wiring harness extension
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Joined: Jan 2014
Posts: 699
Likes: 434
From: Virginia
Thread Starter
Rennlist Member
Joined: Jan 2014
Posts: 699
Likes: 434
From: Virginia
Bosch - 1928403453
Bosch - 1928403736
4-way sealed Plug Bosch BSK Connector Kit for Bosch MAP Sensor
4 Way Sealed Receptacle Bosch BSK Connector Kit for Bosch MAP Sensor
Thread Starter
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Posts: 699
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From: Virginia
Yes they are. The 90 deg offsets come in two pieces. You screw the box section into the exhaust pipe, screw the sensor into the longer section, and then screw the two sections together. After you get the assembly aligned the way you want, you tighten the locking nut.
Last edited by Last_935; Apr 6, 2021 at 04:17 PM.
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Joined: Sep 2020
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I am about to install the Dundon GT3 muffler conversion kit on my 981 GTS, and it has the O2 sensors in approximately the same place as this kit. This thread is a godsend as it helps me identify the required parts to build the extensions, so thankyou for that, but would you mind posting how difficult (or easy) you found it to access the existing plug end of the O2 sensors wires near the bulkhead. If you have any tips on how best to approach this part of the install it would be much appreciated. Finally, if you happen to have or feel like taking pictures of this part of the underside of the car, that would be great. Thanks very much.
Thread Starter
Rennlist Member
Joined: Jan 2014
Posts: 699
Likes: 434
From: Virginia
I am about to install the Dundon GT3 muffler conversion kit on my 981 GTS, and it has the O2 sensors in approximately the same place as this kit. This thread is a godsend as it helps me identify the required parts to build the extensions, so thankyou for that, but would you mind posting how difficult (or easy) you found it to access the existing plug end of the O2 sensors wires near the bulkhead. If you have any tips on how best to approach this part of the install it would be much appreciated. Finally, if you happen to have or feel like taking pictures of this part of the underside of the car, that would be great. Thanks very much.
https://www.bmotorsports.com/shop/pr...oducts_id/1625
https://www.bmotorsports.com/shop/product_info.php/cPath/109_136/products_id/3384
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Instructor
Joined: Jul 2021
Posts: 115
Likes: 41
From: Central KY, USA
O2 sensor extension bits- links/partnumbers?
I'm going through the same thing; I've made these before for a BMWE46 M3 but on my 718 4Liter I'd love to use the correct connectors. I know this is an old post...
Got the system installed. Took some video of the installation but still need to edit it and take the post installation sound readings and video. What I can say is that it transformed the car - the power delivery is much more linear. Also, the downstream o2 sensor wires will not reach to the new location. I have ordered the components to make the extensions. It will take a few weeks as the Bosch connectors are coming from England. I was able to get the wire and shielding off Amazon. Hope to post it on Youtube within the next week or so work permitting.
Thread Starter
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Joined: Jan 2014
Posts: 699
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From: Virginia
I would think that they would be the same as the 981, You would have to look at yours and compare them to the one's I used above. If so, they are still available Ballenger Motorsports at the link listed above.
