Keyless Entry - Remote Won't Lock/Unlock Vehicle
Service Measure
Remote Control Systems
B66 200 03
443
10/03/03
Subject
Remote Control Key Not Working
Complaint
The customer complains that the remote key does not lock/unlock the vehicle - the battery in the remote control is discharged
Vehicles affected - all models 2000MY-on E38, E39, E46, E52, E53, E60, E65, E66, E85.
Cause
1) Battery needs recharging
2) Key is defective
Measure
Analysis of remote control keys returned in warranty show that many are not defective. Only the battery needs to be recharged. Note that without
use, the battery will only retain its charge for approximately 1 year. The Owners Manual advises that the key must be used at least once per year
(driving for an extended period) to maintain its state of charge.
In case of complaint, check with the vehicle owner if the problem key is the key regularly used, or the spare key.
If the spare key is the problem, and a short drive puts sufficient charge in the battery to make it operational again, do not replace the key, but explain
to the customer that the key must be used occasionally (driving for an extended period) to maintain its charge.
If the regular key is the problem, replace the key.
