Both my girlfriends s4 t2 and my s4 t2 have this same exact issue. The wire on the engine harness broke right before the connector for the oxygen sensor.

How should I remedy this issue? Any way to salvage/repair the connector? Or should I use a generic female spade connector.

Will using a solder filled spade connector mess with the resistance and hence the accuracy of the sensor? Or is this a myth.?

Thanks guys.

 

This is a common problem, you can just splice/crimp in the o2s.

 

Some computer nerds will tell you that solder connections are bad. They're so full of ****. At least when it comes to cars, that is. From what I can tell, the only reason people frown on solder connections sometimes is because of high data rate transmission lines. It's true that if you solder something like a high speed internet cable (insert whatever type of cable you computer nerds can think of here), that a resonance can be had inside the solder. That's even if the solder was poorly done and there's porosity in it. There will not be a significant enough voltage drop across a solder joint to affect O2 sensors.


The other argument is that solder connections make the wire on either end brittle. Then what the hell are you supposed to use? Butt connectors do the same thing.


I'm not opposed to either one on a car. Solder, crimp, do whatever you feel like. The only thing that really matters is that you do it right and get some sort of shrink-wrap on whatever type of joint you decide to make. Heat shrink is your friend.

Here's an option. Go to a scrapyard and find a recent model car and snip off a weather proof connector. Solder that bad boy to replace the crappy non-weather resistant connectors the Rx7 came with. Either that or go to a parts store and get the same thing.

 

i depin the connector, strip the wire back, pry and cut the original wire out of the pin and install the freshly stripped wire into it, crimp and reinstall into the connector. also a good idea to reinforce the brittle wire with shrink tubing or use new wire for a short length as a buffer for the brittle engine harness wire. i always solder engine harness wiring and have not had any issues with it.

 

Thanks @agreen for the myth busted! :p

@karack I depinned the connector. Any idea of there I can find a new spade connector with the locking tab on it?

 

splice it and dice it. or you can change the whole engine harness to ensure its reliability