Batteries - replace if the LED does not flash when one of the buttons is pressed and the locks do not work.
Pry up the lid by the notch with a screwdriver (arrow).
unscrew the screw (arrow) and remove the cover.
The type of battery and its mounting position are shown on the bottom of the respective slot.
Use only batteries of the specified type.
Restoring transmitter function
After replacing the battery, it is necessary to restore the remote control function of the transmitter (this is not required if it lasted less than one minute and no buttons were pressed during this time). The same must be done if you have received a new transmitter (For example, when replacing a defective):
- close the driver's door, turn the ignition key to max. 5 seconds to position 1 and return again to position 0;
- press button 1 (see illustration) on the transmitter and hold it in that position. Press button 2 three times in succession within 10 seconds; do not release button 1.
- release button 1, the LED will flash slowly for max. 10 Seconds;
- bring the transmitter close to the receiver located under the interior rearview mirror (as close as possible, maximum 15 cm) and press one of the buttons;
- the automatic system of a single blocking of locks is triggered - the locks are blocked and instantly released, which indicates that the transmitter function has been successfully restored.
If the LEDs do not flash and the automatic single locking system does not work, then the whole process must be repeated again.
If you have additional transmitters for your car, then you must restore their functions within 30 seconds (up to four transmitters in total). In this case, the steering wheel shaft lock must remain intact.
If one of the transmitters fails, you can purchase a spare from the BMW Service.
Just as it is possible to make a copy of each key, the signal of an infrared transmitter can be copied in the same way. The signal code, which changes automatically after each use, as well as the ability to restore the function again, provide the maximum guarantee against abuse. However, do not let strangers use the infrared transmitter.