Denso 3120 Spark Plug

Overview of Denso 3120 Spark Plug

The Denso 3120 spark plug is engineered for reliable ignition performance in a variety of vehicles including Audi A4 Quattro, Toyota Tacoma, and Lexus IS300. Designed with a U-groove ground electrode tip, this spark plug ensures efficient combustion and consistent engine operation.

• U-groove ground electrode tip design for improved spark exposure
• Nickel ground and center electrode tips for durability
• Copper core center electrode for enhanced conductivity
• Standard ground configuration with a single ground electrode
• Flat seat type with 14mm thread diameter and 19mm reach
• Pre-gap size of 1.1 mm for optimal spark gap
• Hex size of 16 mm for easy installation
• Manufacturer heat range of 16 suitable for various engine types

Detailed Product Description

The Denso 3120 spark plug belongs to the U-Groove Conventional product line, which features a unique U-groove ground electrode tip design. This design increases the spark exposure area, promoting better ignition and combustion efficiency. The spark plug’s center electrode is constructed with a copper core to provide excellent thermal conductivity, while the nickel tip enhances electrode durability. The ground electrode is made of nickel as well, ensuring resistance to wear and corrosion. With a flat seat and a thread diameter of 14 mm, this spark plug fits securely in compatible engines. The 1.1 mm pre-gap size is factory set to optimize ignition performance and fuel efficiency.

Compatible Vehicles and Applications

This spark plug is compatible with a wide range of makes and models, including but not limited to:

• Audi A4 Quattro and A5 Quattro
• Toyota Tacoma, 4Runner, Corolla, Supra, and MR2 Spyder
• Lexus IS300 and GS300
• Chevrolet Avenger and Ram 1500
• Hyundai Sonata and Kia Optima
• Jaguar XJ8, XK8, and XKR

Common Issues Addressed by Denso 3120 Spark Plug

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

Installation Notes and Tips

• Ensure the spark plug gap is set to 1.1 mm before installation if adjustment is needed
• Use a 16 mm socket wrench for proper tightening
• Apply anti-seize compound on threads if recommended by the vehicle manufacturer
• Torque to manufacturer specifications to avoid damage to the spark plug or cylinder head
• Inspect ignition wires and coils during replacement for optimal performance

Quality Assurance and Warranty

Denso spark plugs, including the 3120 part number, are manufactured to meet strict quality standards for durability and performance. The use of copper core and nickel electrodes ensures consistent ignition and long service life. While specific warranty details may vary by retailer, Denso products typically come with a limited warranty covering defects in materials and workmanship.