IHR, IHKR and IHKA in the E8x, E9x
The heating and air conditioning systems are air-controlled heating and air conditioning systems. The IHKA has separate settings for the driver's side and passenger's side.
>E8x
The 1 Series is equipped as standard with the integrated heating control (IHR). The integrated automatic heating/air-conditioning system (IHKA) is available as optional equipment (option 534).
From 12/2004, the integrated heating / air-conditioning control (IHKR) is available as optional equipment for all four-cylinder models (option 530).
The integrated heating / air-conditioning regulation (IKHR) is the standard equipment for the six-cylinder models.
Kilde; https://www.newtis.info/tisv2/a/en/e84-x1-sdrive-20d-sav/wiring-functional-info/body/heating-air-conditioning-functions/electric-auxiliary-heating/25K67rA