NGK Iridium Spark Plugs SILZKGR8B8S 94201 - BMW (B58) M140i / M240i / 340i / 440i (Sold Individually)

NGK Iridium Spark Plugs SILZKGR8B8S 94201 - BMW (B58) M140i / M240i / 340i / 440i (Sold Individually)

Upgrade your BMW's performance with the NGK SILZKGR8B8S 94201 Iridium Spark Plug, the premium OEM-approved choice for B58 engines. Designed for models including the M140i, M240i, 340i, and 440i, this spark plug delivers superior ignition efficiency, enhanced combustion, and extended service life.

Engineered with laser-welded iridium at the center electrode and a platinum disc on the ground electrode, it provides unmatched durability and resistance to wear. The fine-wire design promotes faster starts, improved throttle response, better fuel economy, and lower emissions. This spark plug also features trivalent metal plating to prevent corrosion and seizing, even under high-performance conditions.

Key Features:

• OEM-Approved: Direct replacement for BMW B58 factory spark plugs

• Laser-Welded Iridium Tip: Maximum ignition reliability and lifespan

• Platinum Ground Electrode: Enhanced durability and stable performance

• Trivalent Plating: Excellent resistance to corrosion and seizing

• Optimized Ignitability: Faster starts, smoother idle, and quicker acceleration

• Fuel Efficiency: Improved combustion reduces fuel consumption and emissions

Specifications:

• Spanner Size: 14.0 mm Bi-Hex

• Thread Size: 12 mm

• Thread Length: 26.5 mm

• Spark Position: 4.7 mm

• Material: Iridium

• Interference Suppression: 5kΩ

• Sealing Type: Copper gasket

OEM Reference Numbers:

• 12120041666

• 12120040551

• OE 0 041 666 – BMW / MINI

• OE 12 12 0 040 551 – BMW

• OE 12 12 0 041 666 – BMW / MINI

Whether you're maintaining OEM performance or preparing for tuned driving conditions, the NGK 94201 SILZKGR8B8S Iridium Spark Plug ensures consistent performance, optimal fuel delivery, and long-lasting reliability in your BMW B58 engine.