Standard US-138KA Ignition Switch Assembly

US-138KA Ignition Switch Assembly from Standard Motor Products is a 30‑amp, five-terminal ignition starter switch designed as a universal aftermarket replacement for automotive ignition circuits. The five terminals accommodate the essential power, ignition feed, accessory, and starter connections—plus an additional return/ground reference—allowing the switch to route current to the starter while supplying accessories in the run position and preventing backfeed when the key is off. Marketed under SMP's Standard Ignition line, this part is widely stocked by auto parts retailers as a universal ignition switch, with fitment notes and example applications appearing in listings such as O'Reilly Auto Parts, which shows US138KA in the context of 2017 Jeep Renegade compatibility. When selecting this replacement, verify the exact part number US-138KA and confirm that the terminal layout and connector style match your vehicle’s wiring harness to ensure proper operation and reliable engine startup, avoiding mismatches in amperage or wiring that could affect ignition performance.