BMW N20 Engine Ignition Coil 12138616153 12137594596 Stable Power Output

BMW N20 four-cylinder engines (common in 3-Series F30, 5-Series F10, X1 E84) ignition coils, OEM 12138616153 / 12137594596. Coils mount on the cylinder head to deliver ignition energy accurately to the plug, ensuring stable combustion in each cylinder and smooth power. Installation difficulty moderate; labor about 1–1.5 hours; requires removing intake manifold or coil cover. If there is acceleration hesitation, rough idle, power loss, or check engine light, replace coil to restore response.