THIEVES have raided 11 cars in Oakes and Berry Brow, stealing valuables.
They smashed the windows of five vehicles in Oakes and snatched CD players and CDs.
They also took a £2,500 Panasonic satellite navigation system from one car.
On the same night in Berry Brow six cars were broken into.
Goods stolen included a Dell laptop computer and the bonnet and spotlights from a Subaru Impreza.
Police are not linking the two crime spates.
Pc Dave McSweeney, of Huddersfield police said: "People need to be aware that if they are offered CDs or CD players they could be stolen.
"It is also a lesson that you should never leave anything valuable in your car."
Anyone with information should phone Crimestoppers on 0800 555 111 or the police.