Standard Ignition US-307 Ignition Switch

Ignition Switch for Infiniti Q45

Standard Ignition US-307 is a column-mounted ignition switch built for direct replacement service on select Infiniti Q45 models. It uses a bolt-on attachment method, a single rectangular female connector, and five male blade terminals for a straightforward OE-style electrical interface.

Fits 1990-1996 Infiniti Q45, N/A. This ignition switch is a practical choice when the original switch shows wear at the column or the key-on electrical circuit becomes inconsistent. Standard Ignition US-307 is also referenced by 4875060U00, CS634, and KS6263 for the same application.

Key Features

• Column-mounted ignition switch for select Infiniti Q45 applications
• Bolt-on attachment method for secure installation
• One rectangular female connector
• Five male blade terminals for the vehicle’s ignition circuit
• OE-style replacement from Standard Ignition
• Part number US-307 for catalog and cross-reference lookup

Detailed Description

Standard Ignition US-307 is an ignition switch designed for 1990-1996 Infiniti Q45 vehicles with column mounting. The connector layout includes one rectangular female plug and five male blade terminals, which helps match the factory electrical connection pattern during replacement. If you are searching for an Infiniti Q45 ignition switch, a column ignition switch, or Standard Ignition US-307, this part provides the correct fitment details for service work on the steering column assembly.

This part cross-references 4875060U00 and CS634 for the same application.

Common Issues It May Address

• Intermittent no-start condition caused by a worn ignition switch
• Accessory or ignition circuits that do not power on consistently
• Key position response problems at the steering column
• Electrical contact wear inside the original switch
• Replacement needs after switch failure in the Infiniti Q45

Installation Notes and Tips

Verify column mounting, connector shape, and terminal count before installation. Compare the original switch to Standard Ignition US-307 to confirm the bolt-on attachment, rectangular female connector, and five blade terminals match the vehicle harness and column setup. Always inspect the surrounding steering column components and electrical connectors for wear, heat damage, or corrosion before completing the repair.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical and ignition service parts. US-307 is cataloged with defined fitment for 1990-1996 Infiniti Q45 models, helping support accurate part selection for ignition switch replacement.