THIEVES have targeted six vehicles around North Bersted in two nights.
Among the items stolen were radios, a mobile phone and a sat nav.
The spate of crimes has led Sussex Police to urge motorists to remove any valuables and to secure their vehicles.
Sergeant Sarah Leadbetter said: “The majority of this type of crime is opportunistic and occurs because valuables have been left on view or the vehicles left insecure.
“If a vehicle is left insecure, it only takes ten seconds for your valuables to be stolen.
Three of the vehicles targeted by thieves were parked in Stroud Green Drive and Adlington Gardens. They were broken into on the evening of March 10 or the following morning.
Three more vehicles were broken into overnight between March 18 and 19 while they were parked in Whiteways, Ravens Way and Clydesdale Gardens.
Any information should be given to 101, quoting 190 of 19/03 or anonymously to Crimestoppers on 0800 555111.
The crimes have also prompted Sussex Police to remind people about the risk of break-ins at rural car parks with Easter approaching.
A spokesman said: “Often people visit beauty spots and leave valuables in the car while walking. This is a prime opportunity for thieves.
He said cars should always be locked, valuables removed, windows closed, central locking double-checked and keys taken out.