When only one button acts up, the radio module is almost never the problem. The cause sits directly under the button, and that is exactly what makes the diagnosis so simple.
Quick diagnosis on the device
On the secured vehicle test all commands one after another and note which button is affected. If it still responds to stronger pressure or at one edge, that suggests a worn contact under the membrane keypad.
Dirt or wear
If site dust sits in the gap, the button feels stiff or sticky, and dry cleaning from the outside helps. A worn contact, however, can only be fixed from the inside, for which the device is opened professionally and the control renewed.
Do not keep working without the function
A dead button tempts you into operating workarounds, and that makes tipping unpredictable. Have the control repaired promptly, during refurbishment the whole device is tested and delivered with a twelve-month warranty.
Frequently asked questions
Can I map the broken function to another button?
No, the assignment is fixed to the system. The safe way is repairing the affected control.
What does fixing a single button cost?
Through the exchange system the fixed price of 450 euros net applies for a fully tested replacement device, regardless of how small the fault on the old device is.
Several buttons fail one after another, what does that mean?
That points to large-scale keypad wear or ingress of moisture. Have the device fully checked before further functions fail.