Up for sale is a set of good working, used BMW Genuine Bosch, made in Germany ignition coil pack assemblies. These units removed from a recent crash damaged 525 that still ran just fine.  No check engine light, no misfire.  This will work on many BMW models, check the Bosch part number on your originals.  Genuine Bosch units are over $100 per coil! You want to stick with genuine Bosch!  I will warranty these units for 60 days.  Some of the rubber boots are not perfect, you may want to mix and match some of them for ones you have from your originals if they look better, they pull right off the coils and can be interchanged,  but they are all functional as-is.  

I would highly advise against buying the so called "new" aftermarket units!  We have had several customers over they years who buy good used genuine units now because they had bought the sets of "new" china made units, that misfire or cause no-start right out of the box!

These units are generally fairly reliable, however a defective one will cause a misfire, and possibly a no-start condition.