Denso 3194 Spark Plug

Overview of Denso 3194 Spark Plug for Toyota and Lexus Vehicles

The Denso 3194 spark plug is engineered for reliable ignition performance in select Toyota and Lexus models. Designed with a multi-electrode ground configuration and durable materials, this spark plug supports efficient combustion and consistent engine operation.

• Part Number: 3194
• Brand Line: U-Groove Conventional
• Multi-electrode ground configuration with 2 ground electrodes
• Center electrode core made of copper with nickel tip
• Ground electrode core constructed from nickel
• Pre-gap size of 1.1 mm for optimal spark delivery
• Flat seat type with 14 mm thread diameter and 19 mm reach
• Hex size of 16 mm for installation
• Manufacturer heat range rating of 16
• Resistance value of 5000 ohms

U-Groove Conventional Brand Line Details

The U-Groove Conventional spark plug line by Denso features a unique electrode design that enhances spark efficiency and combustion stability. This design helps maintain consistent ignition performance, which is critical for vehicles like the Toyota Tacoma and Lexus GS300. The multi-electrode setup reduces misfires and supports smoother engine operation under various driving conditions.

Technical Description and Features

The Denso 3194 spark plug incorporates a multi-electrode ground configuration with two nickel ground electrodes, improving spark exposure and ignition reliability. The center electrode uses a copper core for excellent thermal conductivity, paired with a nickel tip for durability. The 1.1 mm pre-gap size is optimized to deliver a strong and consistent spark, contributing to efficient fuel combustion. With a flat seat and 19 mm reach, this spark plug fits securely in the combustion chamber, ensuring proper sealing and heat dissipation. The 5000 ohm resistance helps reduce electrical noise interference, supporting stable ignition system performance.

Compatible Vehicles and Common Applications

• Compatible with Toyota models including 4Runner, Corolla, Paseo, Sienna, T100, Tacoma, Tercel, and Tundra
• Compatible with Lexus models such as GS300 and SC300
• Ideal for addressing ignition misfires and rough idling
• Helps resolve poor fuel economy related to spark plug wear
• Supports stable engine starting and acceleration performance

Installation Notes and Tips

When installing the Denso 3194 spark plug, ensure the spark plug gap is set to the specified 1.1 mm pre-gap size if adjustment is necessary. Use a 16 mm socket wrench for proper tightening torque to avoid damage to the flat seat threads. Confirm compatibility with your vehicle’s engine specifications before installation. It is recommended to replace spark plugs in sets to maintain balanced engine performance.

Quality Assurance and Warranty

Denso spark plugs, including the 3194 model, are manufactured to meet OEM standards for fit, form, and function. The materials and design undergo rigorous testing to ensure durability and consistent ignition performance. While specific warranty details may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship.