Denso 4045 Spark Plug

Reliable Ignition Performance with Denso 4045 Spark Plug

The Denso 4045 spark plug is engineered to deliver consistent ignition performance for a variety of vehicles. Featuring a U-groove ground electrode tip design and durable materials, this spark plug supports efficient combustion and engine reliability.

• U-groove ground electrode tip for improved spark exposure
• Nickel ground electrode core and tip for durability
• Copper center electrode core for optimal conductivity
• Standard ground configuration with a single ground electrode
• Flat seat type with 14mm thread diameter and 19mm reach
• Pre-gap size of 0.8 mm for precise ignition timing
• Hex size of 20.6 mm for easy installation
• Manufacturer heat range of 27 suitable for various engine conditions

About the Denso U-Groove Conventional Product Line

The U-Groove Conventional line by Denso focuses on spark plugs with a unique U-groove ground electrode tip design. This design enhances spark exposure to the air-fuel mixture, promoting more efficient combustion. The conventional construction combines nickel and copper materials to balance durability and conductivity, making it suitable for many standard ignition systems.

Technical Details and Application

The Denso 4045 spark plug features a nickel ground electrode core and tip, providing resistance to wear and corrosion. The copper center electrode core ensures excellent electrical conductivity, which is critical for stable ignition. With a pre-gap size of 0.8 mm and a flat seat type, this spark plug fits applications requiring precise spark timing and secure seating. The 14 mm thread diameter and 19 mm reach make it compatible with a range of vehicle engines, including many Toyota Camry and Honda Accord models that specify similar ignition components.

Common Issues Addressed by Denso 4045 Spark Plug

• Misfiring or rough idling due to worn or fouled spark plugs
• Reduced fuel efficiency from incomplete combustion
• Difficulty starting the engine in cold conditions
• Engine hesitation or loss of power under load
• Increased emissions caused by inefficient ignition

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.8 mm to match engine specifications. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended torque to avoid damage to the threads or seat. The 20.6 mm hex size allows for standard spark plug socket compatibility. Inspect the spark plug threads and seat for cleanliness to ensure proper sealing and performance.

Quality Assurance and Warranty

Denso spark plugs, including the 4045 model, are manufactured to meet strict quality standards for durability and performance. While specific warranty details may vary by retailer or vehicle manufacturer, Denso products typically come with a limited warranty covering defects in materials and workmanship.