In the modern world, vehicle security is an important aspect of personal safety and new Kia cee'd is comprehensively equipped to resist thieves. Central locking with all-door override is standard on all models, with speed-sensing automatic locking. Keyless entry and an anti-theft alarm and dash-top security lamp are standard on EX and TX models.

Every cee'd engine is fitted with an advanced electronic immobiliser that was developed in tandem with the Thatcham Motor Insurance Repair Research Centre in the UK, and targets a top-level anti-theft protection rating. Every model has a battery saver which switches off any interior or exterior lights that have been left on after the engine has been turned-off, preventing draining of the battery.