Keep every key-turn firing the right circuits with the Standard Ignition Ignition Starter Switch (US-198, also written US198). This ignition switch is the electrical component that routes battery power through the accessory, ignition/run, and start positions as you turn the key. It installs as a direct-fit replacement for the listed applications: the 1990-1991 Lexus ES250 and the 1987-1991 Toyota Camry — see the Buyer's Guide tab for engine-level details.
- Copper alloy conductors: deliver strong electrical conductivity with low resistive losses.
- 100% tested: each switch is verified for both mechanical and electrical switching performance.
- Robust design, high-grade materials: built to meet the demands of the working service professional.
- Quality-controlled build: from a global manufacturer of original-equipment ignition products, with control maintained from componentry to finished part.
Signs this switch may need replacing include no crank or no power in the start position, intermittent power to the accessories or ignition, or the engine cutting out when the key is jostled. Because these symptoms can have other causes, diagnose the circuit before replacing; if a failed ignition switch is the cause, this restores the switched connections.
Interchange: 18-0381
180381 · CS361 · LS624 · KS6396 · 88921951 · IS29 · 8445017020 · 8445017030 · 8445032030 · 8445032031 · 8445032050
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this ignition switch do?
It is the electrical switch that routes battery power through the accessory, ignition/run, and start positions as you turn the key, sending current to the starter and ignition circuits.
Which vehicles does the US-198 fit?
It is a direct-fit replacement for the 1990-1991 Lexus ES250 and the 1987-1991 Toyota Camry. Check the Buyer's Guide tab to confirm fitment for your vehicle.
What are signs my ignition switch may be failing?
No crank or no power in start, intermittent accessory or ignition power, or the engine cutting out when the key is jostled. Diagnose the circuit first, since other causes are possible.
Is this the same as the ignition lock cylinder?
No. This is the electrical ignition starter switch that handles the switched circuits, not the mechanical key lock cylinder. Confirm which component you need before ordering.
What numbers does this part interchange with?
It replaces 18-0381 (180381), CS361, LS624, KS6396, 88921951, IS29, 8445017020, 8445017030, 8445032030, 8445032031, and 8445032050.
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