Part 12617686501 was found on the following vehicles:
    K25 (R 1200 GS)   (12/2002 — 12/2012)
    K25 (R 1200 GS Adventure)   (03/2005 — 07/2013)
    K25 (HP)   (08/2004 — 11/2008)
    K26 (R 900 RT, R 1200 RT)   (11/2003 — 06/2014)
    K27 (R 1200 R)   (11/2005 — 07/2014)
    K28 (R 1200 ST)   (05/2003 — 11/2007)
    K29 (R 1200 S, HP2 Sport)   (11/2004 — 07/2010)
    K21 (R nineT)   (01/2013 — 08/2016)
    K40 (K 1200 S, K 1300 S)   (04/2003 — 09/2015)
    K43 (K 1200 R, Sport, K 1300 R)   (03/2004 — 07/2015)
    K44 (K 1200 GT, K 1300 GT)   (11/2004 — 10/2010)
    K71 (F 800 S, F 800 ST, F 800 GT)   (12/2004 — 07/2012)
    K72 (F 650 GS, F 800 GS)   (10/2006 — 06/2012)
    K73 (F 800 R)   (12/2005 — 09/2014)
Others, or newer ones such as the liquid-cooled ones, do not have this switch.
There are plugs to measure the oil pressure. Excample for the 1250s engines,
the temperature sensor will be removed.
I can't tell you why the oil pressure switch shows up in the GS911 when it's not there.
Perhaps a cross-model BMW software that includes everything