"These devices have no legitimate purpose, apart from assisting in criminal activity, and reducing their availability will support policing and industry in preventing vehicle theft which is damaging to both individuals and businesses," she said.
Last year, four men were jailed for stealing more than 50 cars worth nearly £4m across the southeast of England after they were filmed using a "master device" to unlock a Bentley before ramming it through a gated driveway in a bid to escape.
Criminals caught with gadgets - including signal jammers - used to steal keyless cars could face up to five years in prison under a new law.
According to the 2022/23 Crime Survey for England and Wales, an offender manipulated a signal from a remote locking device in 40% of thefts of vehicles.
The Metropolitan Police estimates that, in London, signal jammers are used in around 60% of vehicle thefts.
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