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The Bosch universal one comes with this cool little kit whereby you "make" a connector, screw these little threaded pieces onto the end of the wires, the thread and crimp on as they go down, then teh two halves connect together. I did this on mine a few years ago... when I replaced my exhaust, some !@#$ PO has welded the o2 sensor into place.

Now... I have never felt like the a/f ratio was good after that, always been suspect of that sensor and connection. If I could, I'd go back and just get the one weth the OE connector. My paranoia has not been worth the $50 saved.

Your first problem is using a bosch o2 sensor. they're good for GM's, NOT for toyota's, they dont stick down far enough into the exhaust stream....

89 4Runner
3" BL, M/T locks, 33"bfg mt, bilstein, Kayline, tubebumper, toyotafiberglass panels
TBI: Elocker,3.4 w/ORS,b+b,S2Sstg2cams,arias pistons,P+P intake,TRDs/c,URDpullies+7th,downey headers,MAPECU2,WEGO WB, SupraMAF,walboro255,stg4clutch, EPaOo2 sim