Denso 5304 Spark Plug

Overview of Denso Iridium Power Spark Plug 5304

The Denso Iridium Power spark plug 5304 is engineered for reliable ignition performance across a wide range of vehicles including Acura, BMW, Honda, Toyota, and Volkswagen models. Designed to deliver consistent spark and efficient combustion, this spark plug supports optimal engine operation in many popular cars and SUVs.

• 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 efficient heat dissipation
• Nickel ground electrode core material with standard ground configuration
• Flat seat type with 14.00 mm thread diameter and 19.00 mm reach
• Pre-gap size of 1.1 mm and hex size of 16.0 mm for precise fitment
• Manufacturer heat range rating of 20 suitable for various driving conditions

Detailed Product Description

The Denso Iridium Power 5304 spark plug features a fine iridium tip on the center electrode, which provides a stable and efficient spark for improved combustion. The copper core center electrode enhances thermal conductivity, helping to maintain optimal operating temperatures and reduce fouling. The ground electrode uses a tapercut, u-groove design with a nickel core, which increases spark exposure and contributes to better ignition reliability. This spark plug has a flat seat and a thread diameter of 14.00 mm with a reach of 19.00 mm, ensuring compatibility with a broad range of vehicles such as the Toyota 4Runner, Honda Civic, BMW 328i, and Volkswagen Jetta. The pre-gap size of 1.1 mm is factory set for optimal performance, and the hex size of 16.0 mm allows for straightforward installation with standard tools.

About the Iridium Power Brand Line

Denso's Iridium Power line is designed to provide enhanced ignition performance through the use of iridium-tipped electrodes. This technology offers improved durability and a more focused spark compared to conventional spark plugs. The Iridium Power series is suitable for drivers seeking reliable ignition and efficient fuel combustion in a variety of vehicles, including luxury and performance models. The 5304 spark plug exemplifies these qualities with its advanced electrode materials and design.

Applications and Problem Solving

• Restores engine misfire issues caused by worn or fouled spark plugs
• Improves cold start performance in Acura, Lexus, and Subaru vehicles
• Enhances fuel efficiency and reduces emissions in BMW and Audi models
• Maintains consistent ignition in high-mileage Toyota and Honda engines
• Supports smooth acceleration and engine responsiveness in Volkswagen and Nissan cars

Installation Notes and Tips

• Verify compatibility with your vehicle’s make and model before installation
• Use a torque wrench to tighten the spark plug to manufacturer specifications
• Check and adjust the spark plug gap if necessary, though the pre-gap is factory set at 1.1 mm
• Inspect the spark plug threads and clean the cylinder head threads prior to installation
• Replace spark plugs in sets to maintain balanced engine performance

Quality Assurance and Warranty

Denso manufactures the Iridium Power 5304 spark plug to meet strict OEM standards, ensuring reliable performance and durability. While specific warranty details may vary, Denso products typically come with a limited warranty against manufacturing defects. This spark plug is produced with high-quality materials including iridium and copper to provide long service life and consistent ignition performance.