It is. That's the only difference. This has the STI bracket. Not that that matters for the BRZ.

BTW, sorry @Sportsguy83 for the thread jacking

dont hate me :wub:

It's all good. My build thread is more an off topic/random thoughts/chat room kind of deal this days. :bellyroll::bellyroll:

ur build thread is the friendliest place on the dam forums

Now if only selling my Cobb APv2 were this easy...

local Subaru FB group should be piece of cake!

Nope. None of them would bite. Well, one did, but he never showed up to get it (or to pay me).

This is great. So basically this takes the aftermarket wideband o2 sensor reading and feeds it into the stock ecu? As you know im running a failsafe as well, does this then mean that the failsafe will no longer read the afr? confused on that part.

Also you said its for racerom users only, so does that mean i have to upgrade my software? OR will this still work for a tune from a master tuner?

your gauge will still work as normal.. you use one of the other outputs to feed into the ecu (0-5v). your tuner would have to add a custom map to scale the output, then you'd log the result of the custom map just like you would with an ethanol content analyzer in a flexfuel setup (i.e. custom map m result or similar).

Yes, like @jamesm said. If you are tuning the car yourself, you add a custom map that reads the output of the rear O2 sensor. You would need the BRZ RaceRom upgrade from Ecutek to be able to create custom maps.

The white wire coming out of your Failsafe harness is the Wideband analog output. You would connect that to the blue rear O2 cable. You will also need to connect the brown cable to ground.

As soon as your tuner creates the map and updates your tune to RaceRom version 7, you are good to go!!

You would then log custom map X (whatever map he assigned) and it will log your exact AFR :cheers:

Are you using the rear o2 sensor ground to connect? or connecting to a chassis ground location?


Where are you wiring the 12V + switched?

Gonna do this tonight....got a new tuner lined up, and dropping the car off, wish me luck!

Would like to know this too. Also, are you disconnecting the OEM rear O2 sensor harness completely and splicing in to the blue wire on that harness? Or leaving the harness connected to the o2 sensor and splicing into the blue wire?

After seeing the AEM Uego wideband, you would be simply running the 0-5V output wire from the gauge, inside the car, to the blue wire on the rear o2 sensor.


I'm using the passenger ECU wiring harness loom grommet, making a small slit with a razor and sliding the AEM harness through. (As well as the 0-5V output wire, which will need to go into the engine bay.)