View Full Version : Bmw 520i 6cylinder efie

12-14-2012, 12:48 PM
Hi peoples, anyone put an efie on a bmw 520 (98 shape)?, got a circuit built for adjusting voltages between .1 and 1 volt upwards and downwards to put into an o2 sensor, not sure whether that would work on this model, anyone tried anything on a bmw?