Iridium spark plug NGK 97506 SILZKBR8D8S for BMW N20 N54 N55 S55 2.0/3.0 Turbo

Iridium Spark Plug NGK 97506 SILZKBR8D8S for BMW N20 N54 N55 S55 2.0/3.0 Turbo

Technological Superiority of Laser Iridium for BMW Engines

The NGK 97506 (SILZKBR8D8S) iridium spark plug is a premium product from the Laser Iridium line, specifically engineered for high-performance BMW turbocharged gasoline engines. The core of the design is an ultra-fine center electrode with an iridium tip, applied using laser welding technology. Iridium possesses extremely high melting points and hardness, allowing the electrode to maintain its stable shape and ignition precision even under the immense thermal and mechanical loads typical of high-output engines.

Maximum Ignitability and Detonation Protection

High Ignitability technology ensures a rapid and uniform flame front spread within the combustion chamber. This is critical for turbocharged engines in the N20, N54, N55, and S55 series, where high compression ratios demand an instantaneous response from the ignition system. The ground electrode features a platinum inlay that minimizes electrical erosion and guarantees the maintenance of the factory gap throughout the entire service life. A copper core integrated into the center electrode provides efficient heat dissipation, preventing overheating and reducing the risk of detonation.

On-board Electronics Reliability and Durability

The spark plug is equipped with a built-in suppression resistor that eliminates electromagnetic interference, which could otherwise disrupt the operation of engine control units and multimedia systems. The high-quality alumina silicate ceramic insulator features increased dielectric strength, completely eliminating the risk of spark flashover. Trivalent zinc plating on the shell provides superior corrosion protection for the metal and prevents the threads from seizing to the cylinder head, facilitating the subsequent replacement process.

Detailed Compatibility with BMW Vehicles

The NGK 97506 SILZKBR8D8S spark plug is the benchmark for 2.0 and 3.0-liter BMW engines with TwinPower Turbo technology.

Technical Specifications

• Brand: NGK

• Brand Registration Country: Japan

• Material: Iridium, Platinum, Alumina Silicate Ceramic, Copper, Steel

• Size: Thread Diameter 12 mm, Thread Length 26.5 mm, Socket Size 14 mm

• Color: White, Silver Metallic

• Weight: 49 grams

• Gender: Unisex

• Condition: New

• Product Group: Ignition System Spare Parts

• Purpose: Fuel ignition in turbocharged gasoline engines

• Compatibility: BMW N20, N26, N54, N55, S55, N63, S63 engines; M2, M3, M4, M5, M6, X5M, X6M models

• Features: Iridium center electrode, Platinum inlay on the ground electrode, 5 kOhm resistor, High Ignitability technology

• Marking: SILZKBR8D8S

• Manufacturer Part Number: 97506

• Heat Range: 8

• Thread Pitch: 1.25 mm

• Socket Type: Bi-Hex (12-point)

• Spark Gap: 0.8 mm

• Gasket Type: Flat washer

• Connection Type: DIN terminal (removable nut)

• Tightening Torque: 15–25 Nm

• Package Contents: Iridium spark plug in individual packaging — 1 pc

• OEM Compatibility: 12120039664, 12120038896, 12120037580, 12120037582