Standard Ignition Ignition Switch P/N:US-657
Get your engine cranking and every key-on circuit powered with the Standard Ignition Ignition Starter Switch (US-120, also written US120). It drops in as a direct-fit replacement for a wide list of classic Nissan applications, controlling the flow of current from the key to the starter and the vehicle's ignition circuits.
Signs this switch may need replacing include no crank or intermittent starting, accessories or ignition circuits dropping out when the key is turned, or a key that turns without reliably energizing the start position. If a failed ignition switch is the cause of these symptoms, this unit replaces it.
Fitment: 1970-1973 Nissan 240Z, 1974-1975 Nissan 260Z, 1975-1978 Nissan 280Z, 1977-1986 Nissan 200SX, 1977-1981 Nissan 810, 1978-1981 Nissan 510, 1979-1983 Nissan 280ZX, 1979-1982 Nissan 210, 1979-1982 Nissan 310, and 1979 Nissan 620. See the Buyer's Guide tab for full details.
Interchange: 18-0325
CS154 · LS518 · KS6673 · 19021152 · 48750A8700 · 48750E7705 · IS1 · 783131010 · 180325
This part cross-references / interchanges with the following part numbers:
What is the Standard Ignition US-120?
It is an ignition starter switch that controls current from the key to the starter and the vehicle's ignition circuits. It is also written as US120.
Which vehicles does it fit?
It is a direct-fit replacement for several classic Nissan models, including the 240Z, 260Z, 280Z, 200SX, 810, 510, 280ZX, 210, 310 and 620. See the Buyer's Guide tab for the full list.
What are signs my ignition switch may be failing?
Common signs include no crank, intermittent starting, or ignition and accessory circuits dropping out when the key is turned. Diagnose the cause before replacing.
What are the conductors made of?
The switch uses copper alloy conductors, which provide strong electrical conductivity with low resistive losses.
Is this switch tested before shipping?
Yes. Every unit is 100% tested to verify both its 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.