RANGE extender intermittintly doesnt start when electric is low cause dangerous loss of complete power. exacerbated by the fact that it becomes nearly impossible for two people to push in neutral on level ground.

- Mesa, AZ, USA

The I3 requires functional hv battery cooling to operate properly and safely. The car uses a heat pump system to condition the hv batteries. On my car, the A/C system (battery conditioning) failed with no message or warning to the driver. When I took the car to a dealership, I was given a quote for $24,038.21 to fix the car. The invoice also states "note: Vehicle unsafe to drive." How I discovered this problem this vehicle is an early I3 with the fast-charge system included. In July, 2018, the fast-charge failed to work. I tried several chargers and they all failed to communicate with the vehicle. While this was irritating, I did not take the car for service because fast-charging is not a requirement to drive the car and I don't use it often. I am speculating that the A/C system began to fail at this time, but I was given no warning or message. In the fall of 2018, the car began making a much louder motor noise during pre-conditioning in my garage. When I took the car for service in Feb., 2019, a BMW dealership could not duplicate the problem (the problem happened every day during pre-conditioning and driving). In April, 2019, I turned on the A/C and discovered the cabin A/C did not work. I took the car to a different dealership. They diagnosed the problem as A/C valve faults, gray metallic debris, insufficient refrigerant (877G vs. Required 970G), and zero (vs. Required 300G) refrigerant oil. According to BMW literature ( BMW technical training, heating and A/C systems, P.43), "these quantities are crucial to the operation of the system........" this quote refers to the quantity of refrigerant in the system of the bev or rex. I have attached the invoice from BMW-rochester hills on June 1 with the diagnostic information and the quotation for repairing the system. The training manual is a large file. I can send it as required.

- Livonia, MI, USA

After a recent software update, the computer is unable to indicate the accurate state of charge, causing unexpected power loss. My range extender was not able to engage before power loss, and the car indicated 50+ miles of range remaining. I was driving on a freeway when the power loss occurred, which took me from 65 mph to a dead stop in a manner of seconds.

- San Diego, CA, USA