Turn the key with confidence using the Standard Ignition Ignition Switch (US-307), also known as an Ignition Starter Switch. It drops in as a direct-fit replacement for the 1990-1996 INFINITI Q45, restoring the electrical switching that routes power to the starter and ignition circuits when you turn the key. See the Buyer's Guide tab for engine-level fitment details.
Built by a global manufacturer of original-equipment ignition products, this switch is made under complete quality control from componentry through finished assembly.
Copper alloy conductors: deliver superior electrical conductivity with low resistive losses.
Quality materials: constructed from finely selected materials for proper fit and function.
100% tested: each unit is verified for both mechanical and electrical switching performance.
Robust design: high-grade materials built to meet the demands of today's service professional.
If a worn or failed ignition switch is the cause of no-crank, intermittent power, or accessories that cut out as you turn the key, this replaces it. Diagnose the underlying cause before installing.
Interchange: CS634 · KS6263 · 4875060U00
This part cross-references / interchanges with the following part numbers:
CS634, KS6263, 4875060U00, US-307
Frequently Asked Questions
What vehicle does this ignition switch fit?
It is a direct-fit replacement for the 1990-1996 INFINITI Q45. Check the Buyer's Guide tab to confirm the exact fit for your vehicle.
What does the ignition switch do?
It handles the electrical switching that routes power to the ignition and starter circuits when you turn the key, energizing the run, start, and accessory positions.
What are the signs my ignition switch may need replacing?
Common signs include no-crank when turning the key, intermittent power, or accessories that cut out. Diagnose the cause first, since other components can produce similar symptoms.
What is the conductor material?
It uses copper alloy conductors, which provide superior electrical conductivity with low resistive losses.
Which interchange numbers does this switch cross-reference?
It cross-references CS634, KS6263, and 4875060U00. Match your original number to confirm the correct replacement.
Keep the key turning and every start-up circuit switching cleanly with the Standard Ignition Ignition Switch US-657 (also written US657), also known as an Ignition Starter Switch. It drops in as a...
WARNING:
These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
