How to Replace the Button or Battery in VW Passat Smart Key

The replacement button you will need is a 5mm x 5mm x 1.5mm SMD Momentary 4 Pin Tactile Micro Switch which you can buy online in packs of 100  for only a few pounds.

The Amazon link to 5mm x 5mm Momemtary Tactile Micro Switch (cost aprox £3.00) is below.

http://amzn.to/2oe7nXv

It’s a good idea to replace the battery at the same time which is a standard 2032 3V battery.