Originally Posted by Dr. Flyview
Really?? Well then what am I thinking of? There was definitely something like this that could be done. A sensor that could be adapted with new wiring from a 325 to a 328 and it was much cheaper.
You can buy a universal Bosch O2 sensor for like $30 and wire it up to OBDI BMWs (which are also Bosch, just more expensive) ... that's probably what you're thinking of.