I was looking to get a new rotor for my car, and came across something I don't think I noticed last time - the different resistances available for the part.

Looking at realoem, I see there are 5000 ohm rotors (possibly NLA) and 1000 ohm rotors.

The diagram seems to indicate that mine would be the 5000 ohm one (the dates don't show clearly, but it says this is the one for the "723" distributor, which maps to the "006" bosch distributor I have.

My question is, what difference does the rotor resistance make? Being that I probably bought whatever was cheap and easy last time, I bet my existing rotor is the 1000 ohm kind. I know my coil is also not the original one, having higher resistance than its supposed to.

The car still starts and works great, so I'm wondering if the difference is just for radio suppression or something?


https://www.realoem.com/bmw/enUS/sho...diagId=12_0008