A basic ‘chipped key’ (transponder key) has several disadvantages compared to a key with a keyless entry fob/remote. This include the inconvenience compared to remote central locking. Some vehicles may not deadlock and will therefore not be as secure. Some vehicles such as some Renaults only have a door lock on the passenger side which can be rather annoying after a while. Additionally some vehicles will not set the alarm unless the remote is used. EU and US vehicles will normally silence an alarm once the key is turned in the ignition. Asian vehicles often will not silence the alarm unless the remote is used.
In the example below the customer’s car only came with 1 transponder key. They wanted a remote. They chose this bright green version. This particular make of remote can be programmed to become several thousand different car remotes.
Not all vehicles are able to lock with a remote. Basic versions of some VW and Fiat for example do not have the electronics for keyless entry. A giveaway on modern vehicles can be if there are rear window winder handles.