Denso 5375 Spark Plug

Overview of Denso Iridium Power Spark Plug 5375

The Denso Iridium Power spark plug 5375 is engineered for precision ignition performance in BMW M3, M5, and M6 models. Designed with advanced materials and a specialized electrode configuration, this spark plug supports efficient combustion and reliable engine operation.

• Iridium center electrode tip for enhanced durability and ignition
• Tapercut, u-groove ground electrode tip design for improved spark exposure
• Copper core center electrode for optimal conductivity
• Nickel ground electrode core material with standard ground configuration
• Pre-gap size of 0.9 mm for precise spark gap
• Flat seat type with 19.00 mm reach and 12.00 mm thread diameter
• Hex size of 18.0 mm for standard installation tools
• Manufacturer heat range rating of 22
• Resistance value of 5000 ohms to reduce electrical noise

Detailed Features and Specifications

The Denso Iridium Power 5375 spark plug incorporates a copper core center electrode with an iridium tip, which provides a balance of excellent electrical conductivity and wear resistance. The ground electrode features a tapercut, u-groove design that enhances spark exposure and combustion efficiency. With a single ground electrode made from nickel, the plug maintains durability under high-temperature conditions. The flat seat design ensures a secure fit in the combustion chamber, while the 19.00 mm reach and 12.00 mm thread diameter match OEM specifications for BMW M3, M5, and M6 engines. The 0.9 mm pre-gap size is optimized for consistent ignition performance, and the 5000 ohm resistance helps minimize electromagnetic interference with vehicle electronics.

About the Iridium Power Product Line

Denso's Iridium Power line focuses on delivering spark plugs with iridium-tipped center electrodes, which offer improved ignition efficiency and longer service life compared to conventional plugs. The 5375 model benefits from this technology by providing reliable spark generation and enhanced durability, making it suitable for high-performance BMW vehicles such as the M3, M5, and M6.

Compatible Vehicles and Common Applications

• Replacement spark plug for BMW M3 models requiring part number 5375
• Suitable for BMW M5 engines needing precise ignition components
• Compatible with BMW M6 vehicles for maintaining factory ignition standards
• Addresses issues such as misfires, rough idling, and poor fuel economy
• Helps resolve ignition-related starting difficulties and engine hesitation

Installation Notes and Tips

When installing the Denso Iridium Power 5375 spark plug, ensure the engine is cool to prevent thread damage. Use a torque wrench to tighten the plug to the manufacturer’s recommended specifications. Verify the pre-gap size of 0.9 mm before installation, adjusting if necessary. The 18.0 mm hex size allows for standard spark plug sockets. Proper installation will help maintain optimal ignition performance and engine efficiency.

Quality Assurance and Warranty

Denso manufactures the Iridium Power 5375 spark plug to meet strict OEM standards for fit, form, and function. The use of high-quality materials such as iridium and copper ensures durability and consistent performance. While specific warranty details may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship.