Need to replace the ignition lock cylinder. I see both expensive and cheap cylinders. Expensive cylinders have the following description: : Ignition Lock Cylinder -- With Immobilizer; With Anti-Theft; Must Use Scan Tool With Anti-Theft Security Access for Installation.
Cheaper ones have following description: Without Immobilizer; Without Anti-Theft; Must Use Scan Tool With Anti-Theft Security Access for Installation
How do I determine which one to buy?