For the fuel-air mixture of the engine to ignite perfectly, a stable ignition spark is required at the right moment. Therefore, the right choice of spark plug is essential for optimal combustion and engine performance development. Special attention should be paid to the heat range according to the manufacturer's specifications. Since each manufacturer specifies the heat range differently, for example, a Bosch heat range 3 may correspond to an NGK value of 9. Manufacturer specifications along with alternative spark plugs and their exact designations or type codes are listed in the vehicle manual for guidance.

Care should be taken when using suppressed spark plug connectors; doubled is not always better, in this case, no suppressed spark plug should be used as the overall suppression resistance would be too high.

• High-quality aluminum oxide silicate ceramic, creates a stronger insulator for optimal performance
• 98% pure copper core, offers excellent heat dissipation and conductivity
• Cold-rolled threads, prevents cross-threading and damage to the cylinder head
• Outstanding material coating, provides excellent corrosion protection

Technical specifications:

• Type designation: BPR4ES
• Thread type: Long thread
• Thread length: 19.0 mm
• Thread diameter: 14.0 mm
• Wrench size: 20.8 mm
• Electrode gap: 0.85 mm
• NGK heat range: 4
• Resistance: Suppressed
• Scope of delivery: 1 piece

The correct torque for spark plugs:

NGK Spark Plug

With the two brands NGK (Ignition) and NTK (Sensor Technology) and a comprehensive product range, NGK Spark Plug is the market leader in the areas of spark plugs, glow plugs, ignition coils, lambda sensors, spark plug connectors, and ignition cables. The company philosophy "Performance through precision, precision for performance" reflects the high standards for their own products. Through high-quality products and as a globally operating original equipment manufacturer for renowned vehicle manufacturers, NGK has been the world market leader in their field for many years.