Ignition distributor Mitsubishi Galant E50

Hello guys, for some time now my E50 has been running out suddenly when the ADAC was there he jumped on again and again, now no more. The ADAC has measured and determined that no ignition spark is coming, but where signals arrive from the control unit (he pulled off the contacts and held on a multimeter) Then treated the plugs with contact spray and the engine ran again, unfortunately only for about 2 kilometers. After analysis in a workshop, to which the ADAC then closed me The remaining 10% “could” be the immobilizer. What would you do? I tend to read more, but have no idea about the quality of the new replicas? Does anyone have experience with it, if it also lasts 3 years, would it be enough for me, the car is no longer the youngest (Bj. 93)? Is it difficult to change the part yourself? Is there anything to consider besides the order of the ignition cables? I need an ignition distributor T6T58271. Greeting G321