# 2000 Buick Century - Key quandary

**URL:** <https://community.cartalk.com/t/2000-buick-century-key-quandary/197625>\
**Category:** Maintenance/Repairs\
**Tags:** keys, buick\
**Created:** [October 15, 2024, 7:10pm UTC](https://community.cartalk.com/t/2000-buick-century-key-quandary/197625 "2024-10-15T19:10:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Barbherding](https://avatars.discourse-cdn.com/v4/letter/b/b19c9b/32.png) [@Barbherding](https://community.cartalk.com/u/Barbherding)\
**Post date:** [October 15, 2024, 7:10pm UTC](https://community.cartalk.com/t/2000-buick-century-key-quandary/197625/1 "2024-10-15T19:10:04Z")

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Have two keys one will start the car, but the other one won’t, but they both unlock it.

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**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\
**Post date:** [October 15, 2024, 7:49pm UTC](https://community.cartalk.com/t/2000-buick-century-key-quandary/197625/2 "2024-10-15T19:49:19Z")

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There are two types of keys:

![image](https://global.discourse-cdn.com/cartalk/original/3X/8/6/862760b0a02cbeb065b8a40cb55f854eae4dba49.png)

The ignition key should have a resistor pellet in place for the Pass Key security system. Replacement keys must be registered or trained to the system.