How does It work?
This O2 Sensor Spacer works on competitive racing vehicles by moving the post-cat oxygen sensor out of the direct exhaust flow. It effectively reduces the amount of exhaust gas exposed to the oxygen sensors tip to that of a normal production street vehicle. This O2 Sensor Spacer usually clears the p0420 and p0430 check engine light codes (cel) 95.9% of the time., if the p0420 or p0430 cel is illuminated the engine control unit (ECU) will put the vehicle into “limp mode” (safe mode) resulting in poor performance and gas mileage, not to mention it’s pretty annoying seeing that check engine light on all the time.
O2 Sensor Spacers are only installed on the post cat (rear) oxygen sensors usually located at or slightly past the catalytic converter. Vehicles have either one or two post-cat oxygen sensors and an o2 simulator should be installed on each post-cat sensor to remove p0420 and p0430 and check engine light codes for a bad or missing catalytic converter.
FITMENT, will it fit my vehicle?
This O2 Sensor Spacer is threaded 18mm x 1.5 which is the size of 99% of vehicles produced. Check your owner’s manual, and performance data or just crawl up under there, locate the post-cat sensor and put a 7/8 inch or 22mm wrench on the hex portion of the oxygen sensor if the wrench fits then you have 18mm x 1.5 threads. Correct fitment is your responsibility, please take the time to check.
Clearance, how much room is needed for installation?
The only issue for clearance is the length of the O2 Sensor Spacer and Oxygen Sensor combined as measured from the exhaust pipe to the oxygen sensors wire tip. This length is 4.5 inches (115mm) so imagine your presently installed oxygen sensor is 2 inches longer than it is, that’s how much clearance you need to install this type of O2 Sensor Spacer. It is your responsibility to ensure there are no clearance issues.
How is the O2 Sensor Spacer Installed?
The O2 Sensor Spacer simply screws into your existing exhaust pipe using the same thread port where your post-cat sensor is located. Installation is easy, first, disconnect the oxygen sensor and unscrew it. Second, screw back in the O2 Sensor Spacer, then screw in the oxygen sensor, reconnect the oxygen sensor, and that’s it your done.
Please Note:
(1) This Does Not Fix A Defective O2 Sensor, Wiring or Heater Circuits.
(2) No…O2 Sensor Is Included In This Offer.
(3) Designed For Post Cat Sensor ONLY.
(4) Intended For Competitive Modified Exhaust Use Only.
(5) Do Not Use To Remove Cel Caused By Faulty Catalytic Converter!
(6) It is the buyer’s responsibility to check and verify Fitment and Clearance issues.
Five Stars
worked fine and was a exact fit for the hole i needed to plug.
joshua tiagoon July 21, 2017
Will sieze if you get it good and hot..
Mine siezed up badly. Broke two extensions trying to remove the dang thing. Amazingly the hex head held up just long enough to finally remove it with an 18 inch breaker bar. After finally getting it out, about the first four threads were still in the bung. Took a few passes with a thread chaser to clean up. The other one I purchased, I was able to mount a few more inches downstream of the manifold. It has given me no problems at all. It must be made from quality steel. Hats off to the the hex socket for holding up to the amount of torque it took to remove it. Going to seek out a good anti-sieze that might possibly be able to handle that application.
thanh leon March 22, 2018
Five Stars
2016 sti. Perfectt fitsThanks
Chris Downeyon August 29, 2018
Where is the crush washer?
There should be something in the package to use for a crush washer
Luis Fernando Ricoon March 16, 2019
Dont forget the washer
Work fine but didnt come with a copper crush washer.
David Bradleyon March 18, 2019
Dont worry about the measurement
It fits the porpoise..in my new pipe for the camry 2002
ramoncito g. de laramaon April 27, 2019
good product
exactly what I needed. Prompt service. If every thing they sell is this good, count me a steady customer.
esteban malaveon July 31, 2019
perfectly. Works
Fit my o2 plug hole perectly.
frank jahneron November 3, 2019
Good.
I didnt need it and they were cool to let me return it.
William Haydenon January 6, 2020
Exactly as advertised. Shipped quick
Plugged a wideband port while not using it. Worked great
Jennifer Coxon January 29, 2020
Solid
Solid. Good price
Muhammed Ayubaon February 2, 2020
Worked
Fit what I needed little over priced for a plug but when you need it you need it lol
Cocho Quijanoon February 13, 2020
Fits Standard O2 Sensor Port
One of my o2 sensor plugs fell of my truck and this was an exact fit to replace it and better design as well.
sean wolkon February 14, 2020
Works
I added a power commander to my motorcycle and no longer needed the O2 sensors. Instead of just disconnecting them, I removed them and used these to plug the hole. No crush washers weres included but it does not appear they are needed (no exhaust leaks without them). BMW r1200gs
vincenton March 19, 2020
Oxygen sensor cap
I like and fit perfectly
samir samadon April 28, 2020
What I was looking for.
Perfect fit.
Gilberto Davilaon May 12, 2020
Used as a rear differential fill plug
Needed a fill plug for the rear differential on a 2004 Pontiac Vibe AWD. Previous mechanics had stripped out the original hex plug. Used vice grips and a hammer to remove. Since the O2 sensor plug had the same specs and was basically the same, a new crushable washer and some antiseize compound seems to have done the trick and saved a few bucks off the OEM plug.
long doleon July 6, 2020
Works great
Right part to close off a o2 sensor port for a Mazda 3. (2006)
thuy thaion July 25, 2020
fittted perfect
great
Mark Cheslea Holleyon August 25, 2020
Nice piece
Fit like it should. No complaints
tharwat hannaon September 2, 2020
Worked perfectly
Nice plug, did the job
Mark Dizonon September 9, 2020
Works well
What can you say! It works.
weiwei Tanon December 11, 2020
Good quality!
Well it work for me! Good quality and good price
MARTY CLUBBon April 4, 2021
O2 sensor plug
Worked great to plug an O2 sensor hole.
Ray Roqueon July 31, 2021
Victory Judge
Removed my O2 sensors on my Victory Judge. Easy install and looks clean! Apply anti-sieze!
Richard Leeon September 15, 2021
Perfect fit
Fits perfect on my Z900RS cafe.
N and S Auto Partson July 7, 2022
Great prices easy to order fast shipping acute shipment tracking and great quality products
Stephen Mcalister Jron September 19, 2022
Can’t wait to install it.
Carl Danielson March 29, 2023
phillipe masseon April 19, 2023
Item exactly as described and fast shipping.
Anonymouson April 25, 2023
Waleed Itanion May 22, 2023