Built for dependable switching behind your ignition key, the Standard Ignition Ignition Starter Switch US-251 is the electrical switch that routes power to the ignition and accessory circuits and feeds the starter circuit as the key is turned to start. It is a direct-fit replacement for many vehicles, among them the 1991-1999 Buick LeSabre, 1995-1996 Buick Century and 1991-1996 Buick Park Avenue. See the Buyer's Guide tab for the full list and engine details.
Signs this part may need replacing include an engine that won't crank when the key is turned, dash lights or accessories that cut out, or a vehicle that stalls unexpectedly. The battery, starter, wiring or lock cylinder can cause similar symptoms, so diagnose the cause before replacing. If a failed ignition switch is behind the problem, the US-251 replaces it.
Interchange: CS251 · LS644 · KS6536 · 1990163
This part cross-references / interchanges with the following part numbers:
Is this the right Century switch for a 1995-1996 Buick Century?
Yes. The US-251 is listed for the 1995-1996 Buick Century, and also for the 1991-1999 Buick LeSabre and the 1991-1996 Buick Park Avenue. The Buyer's Guide tab shows every listed vehicle.
What does an ignition starter switch do?
It is the electrical switch that routes power to the ignition, accessory and starter circuits as the key moves through its positions.
What are the signs that my ignition switch may be failing?
Common signs include no crank when the key is turned, dash lights or accessories that cut out, and stalling. Other parts can cause the same symptoms, so diagnose the cause before replacing the switch.
What are the conductors in the US-251 made of?
The US-251 uses copper alloy conductors. They are designed for superior electrical conductivity with low resistive losses.
Is the US-251 tested?
Yes. Standard tests its parts 100% to verify both mechanical and electrical switching performance.
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.
