(06-17-2023, 12:59 PM)saread Wrote: The product data (Owner's Manual) refers to two antennas. The electronic immobilizer is supposed to utilize a ring antenna on the ignition switch that communicates with the fob with a separate ring antenna located under the seat.
I forgot the bikes with a regular key needs a antenna ring at the ignition switch.
My K1300S was like that. The chipped key didn't need a battery to extend it's range because the key was right next to the antenna ring when the key was in the switch.
The early K1200Ss had problems with faulty antenna rings at the switch (maybe all BMWs in that period with chipped keys). People used to carry a spare antenna ring. You could get at the connector to plug in a new ring and zip tie it to the switch to get you home.
Lee
Iowa, USA
2022 R1250RS White Sport
Past BMWs: 2016 R1200RS x 2, 2011 K1300S x 2, 2003 K1200RS x 2, 1991 K75S x 2, 1987 K75T x 2, 1984 R100RT
Iowa, USA
2022 R1250RS White Sport
Past BMWs: 2016 R1200RS x 2, 2011 K1300S x 2, 2003 K1200RS x 2, 1991 K75S x 2, 1987 K75T x 2, 1984 R100RT