12120037582 BMW SPARK PLUG/X5/X6/MANY MODELS, Price: 27.18$, Weight: 0.04kg

High‑Performance Ignition Plug for BMW Turbo Six

Keep your BMW starting clean and pulling hard. This OEM‑grade ignition plug delivers a strong, stable spark under high boost and heat. Fresh plugs are essential for smooth idle, fast throttle response, better fuel economy, and reliable cold starts. They also protect coils, turbos, and catalytic converters by preventing unburned fuel from reaching the exhaust.

How it works ⚙️

A fine‑tip center electrode fires across a precise gap to the ground strap, igniting the air‑fuel mix. The ceramic insulator controls heat flow to prevent pre‑ignition, while the built‑in resistor filters electrical noise for accurate ECU readings. Correct heat range and tight sealing ensure consistent combustion in every cylinder.

When it’s worn or failing

Signs include hard start, rough idle, misfires under load, hesitation, poor mileage, sulfur smell, and a flashing MIL. Long driving with misfires can damage O2 sensors and cats, overheat the turbo, and stress ignition coils.

Install notes ✅

Replace all plugs as a set. Use clean, dry coil boots. Gap is factory‑set; do not re‑gap. Torque on a cool engine to 23 Nm (17 lb‑ft). No anti‑seize on plated threads. Service every 30–60k miles; sooner on tuned cars.

Compatibility

• 535I
• 135I
• 335I
• 335Xi
• X6 35Ix
• X5 35Ix
• 535Li
• 535Ix
• X3 35Ix
• X1 35Ix
• 640I
• Hybrid 5
• 740I
• Hybrid 7
• 740Li
• 740Lix
• Hybrid 7L
• M135I
• 335Ix
• X5 40Ix
• X6 40Ix
• 335Li
• Hybrid 3
• M135Ix
• 640Ix
• 435I
• 435Ix
• X5 35I
• M235I
• X4 35Ix
• M235Ix
• X6 35I
• M235I Racing