Check your iDrive for heat settings and distribution. If that's correct then check your coolant 3-way valve. If that's alright then check your coolant temperature sensor. If that's working then check your thermostat.Hi everyone,
2005 E60 530i. Usually when the heat go low is because I need to add some coolant. But the heat from my E60 is so weak compared with my old 1994 E34 525i. Any ideas on how to improve or what is wrong with my E60?