Is the alternator on BMW R90S the same as BMW authorities?
The Authorities model has the same 238 watt rating as the R90S; but, is designed to produce usable output at a slightly lower rpm than all the others, except the very last Airheads. Almost all alternator parts are physicallyinterchangeable (the 105/107 mm stators being the exception).
Why is there a warning light on my BMW alternator?
In most cases, a failing alternator’s early stages will cause these warning lights and messages to come on just for a few seconds and then turn off. One of the most common problems that can cause a BMW battery or alternator warning messages is an old battery no longer holding a charge.
When does BMW battery warning light come on?
When BMW alternator voltage output is above or below the recommended limit ( typically 13.3-14.5 volts), then the red battery warning light will illuminate on the dashboard, and a message will pop up on the iDrive screen.
What does it mean when your alternator is malfunctioning?
Cars with an iDrive system will display alternator malfunction warning messages such as vehicle battery charge low or vehicle battery discharged while stopped. Once the voltage output is within the proper range again, the warning light will turn off.
The Authorities model has the same 238 watt rating as the R90S; but, is designed to produce usable output at a slightly lower rpm than all the others, except the very last Airheads. Almost all alternator parts are physicallyinterchangeable (the 105/107 mm stators being the exception).
In most cases, a failing alternator’s early stages will cause these warning lights and messages to come on just for a few seconds and then turn off. One of the most common problems that can cause a BMW battery or alternator warning messages is an old battery no longer holding a charge.
When BMW alternator voltage output is above or below the recommended limit ( typically 13.3-14.5 volts), then the red battery warning light will illuminate on the dashboard, and a message will pop up on the iDrive screen.
Are there any problems with BMW airhead alternators?
NOT all combinations are wise or will work properly. In general, the only low-charging problems that might occur is with the last rotors (2.8 ohms) if installed in earlier bikes, although the last of the stators can also not work all that well with early rotors.