About this part
What it does. Autolite Autolite APP5684 Double Platinum Spark Plug Autolite 374-APP5684 delivers the spark that ignites the air-fuel mixture in the cylinder.
Symptoms that point to this part
- Misfire codes
- Rough idle
- Hard starting
- Loss of power under load
Fitment. Catalogued as fitting 2026 Toyota Crown Signia, 2023 Mitsubishi Outlander Phev. Engine, sub-model and trim can narrow fitment further, so check those attributes on the listing before ordering.