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About this part
What it does. Dinan Spark Plug Dinan 9397-D640-0001 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 BMW 840i, 2025 BMW 840i Xdrive Gran Coupe, 2025 BMW 840i Gran Coupe, 2025 BMW 430i Xdrive Gran Coupe, 2025 BMW 430i Xdrive, 2025 BMW M240i Xdrive, 2025 BMW M3, 2025 BMW X4, 2025 BMW 430i Gran Coupe, 2025 BMW Z4, 2025 BMW 840i Xdrive, 2020–2024 BMW M235i Xdrive Gran Coupe. Engine, sub-model and trim can narrow fitment further, so check those attributes on the listing before ordering.
Fits these vehicles
- 2026 BMW 840i
- 2025 BMW 840i Xdrive Gran Coupe
- 2025 BMW 840i Gran Coupe
- 2025 BMW 430i Xdrive Gran Coupe
- 2025 BMW 430i Xdrive
- 2025 BMW M240i Xdrive
- 2025 BMW M3
- 2025 BMW X4
- 2025 BMW 430i Gran Coupe
- 2025 BMW Z4
- 2025 BMW 840i Xdrive
- 2024 BMW M235i Xdrive Gran Coupe
- 2023 BMW M235i Xdrive Gran Coupe
- 2022 BMW M235i Xdrive Gran Coupe
- 2021 BMW M235i Xdrive Gran Coupe
- 2020 BMW M235i Xdrive Gran Coupe