Standard Ignition US-684 Ignition Lock Cylinder and Switch

Ignition Lock Cylinder and Switch for Nissan Altima

Standard Ignition US-684 is a coded ignition lock cylinder and switch assembly for column-mounted applications. It is built with a silver and white aluminum/plastic finish, a female connector, and a 6-blade male terminal layout for direct replacement service on select Nissan Altima models.

Key Features

• Fits 1997-1999 Nissan Altima, column mount
• Coded ignition lock cylinder and switch assembly
• Column-mounted design with 1 female connector
• 6 male blade terminals for electrical connection
• Silver and white finish with aluminum and plastic construction
• Includes keys and mounting bracket(s)
• Standard Ignition US-684 replacement part

Detailed Description

Standard Ignition US-684 is a replacement ignition lock cylinder and switch designed for select 1997-1999 Nissan Altima vehicles. This coded unit is intended for column-mounted installations and includes the lock cylinder, switch components, keys, and mounting bracket(s) needed for service replacement. The connector layout uses one female connector and six male blade terminals, matching the electrical interface required for the listed application. If you are searching for a Nissan Altima ignition lock cylinder and switch, US-684 provides a direct-fit service part reference for these model years. This part cross-references CS1044 for the same application.

Common Problems This Part Can Address

• Key will not turn smoothly in the ignition cylinder
• Ignition switch failure causing no-start or intermittent start conditions
• Worn lock cylinder components that prevent proper key engagement
• Electrical contact issues at the ignition switch terminals
• Damaged column-mounted ignition assembly on a 1997-1999 Nissan Altima

Installation Notes and Tips

Verify vehicle year and column-mounted configuration before ordering. Compare the connector style, terminal count, and coded lock cylinder setup to the original part on the vehicle. Instructions are not included, so installation should be performed with the correct service information for the Nissan Altima ignition system. Confirm key and cylinder operation before final reassembly.

Quality Assurance

Standard Ignition replacement parts are built for service applications that require accurate fitment and dependable electrical connection. US-684 is cataloged for the listed Nissan Altima model years and should be matched to the original part number and connector configuration during diagnosis and replacement.