bmw-g-series-coding

Information on coding BMW G series vehicles with a focus on the G20

Items I have coded with existing cheat codes:

Name	ECU
Remove legal disclaimers	HU_MGU
Auto Start Stop Memory	DME
Active Sound Dynamics Off
Air Conditioner Memory
video in motion	HU_MGU
full SMS text display	HU_MGU
video in motion	HU_MGU
enable coasting/sailing	HU_MGU
5x Turn Indicator	HU_MGU
m startup animation	HU_MGU
close trunk from fob	HKFM2
close trunk from door switch	HKFM2
speedometer correction	DKOMBI
comfort+ driving mode	BDC_BODY, HU_MGU, SAS2
Lane change assistance	BDC_BODY, HU_MGU, SAS2

Coded items without currently existing cheat codes

Name	ECU	Property	Value
auto steering wheel heater when cold (1/3)	HU_MGU	AKT_Auto_Lenkrad	aktiv
auto steering wheel heater when cold (2/3)	BDC_BODY	LHZ_CCM_IKF	aktiv
auto steering wheel heater when cold (3/3)	BDC_BODY	IKF_ENABLE	ikf_alle_sitze
lane change assistance (1/3)	BDC_BODY	SPURWECHSEL_ASSISTENT	aktiv
lane change assistance (2/3)	HU_MGU	SPURWECHSELASSISTENT	gen_1
lane change assistance (3/3)	SAS2	C_SWA_VORHANDED	NR001_VORHANDEN

Items that I am Testing/Verifying

Name	ECU	Instructions
Flashing Brake Force Display	BDC_BODY	apply cheat code
anti-dazzle/no glare high beams	BDC_BODY, KAFAS4, HU_MGU, FLM, FLM	VO Code to remove 5AC, then code listed ECUs

Items I am still researching or waiting on bmw updates to fix/enable

• full ///M gauges, HUD, idrive settings, etc. current implementations I have seen are not complete
• heated seats via remote start
• heated steering wheel via remote start

I don't believe are possible due to hardware restrictions

• Enable blue lights in headlamps (laser lights) - the US lights have a white bulb there, not blue
• full LED headlight brightness (EU spec) - after coding my FLM to ECE values nothing changed, and no values related to brightness were altered
• full Laser light brightness (EU spec) - same reason as above
• Seat heater distribution. The codes below enable the option, but I don't believe the G20 has the hardware and changing the distrivution causes odd behavior at best. I would not advise using these. | Driver's seat heat distribution (1/3) | SM2 | SHZ_TYP | werte 02 | | Driver's seat heat distribution (2/3) | BDC_BODY | SITZHEIZUNG_FRONT_schichtung | active | | Driver's seat heat distribution (3/3) | BDC_BODY | SITZHEIZUNG_FOND_schichtung | active |

More details can be found on my Bimmerpost forum post

• https://g20.bimmerpost.com/forums/showthread.php?t=1673049