Denso 3135 Spark Plug

Overview of Denso 3135 Spark Plug for Nissan and Volkswagen

The Denso 3135 spark plug is engineered for reliable ignition performance in select Nissan and Volkswagen vehicles. Designed with a U-groove ground electrode tip, this spark plug supports efficient combustion and consistent engine operation in models like the Nissan 240SX and Volkswagen Golf.

• U-groove ground electrode tip design for improved spark exposure
• Nickel ground and center electrode tips with copper core for durability and conductivity
• Standard ground configuration with a single ground electrode
• Flat seat type with 22.00 mm reach and 14.00 mm thread diameter
• Pre-gap size of 1.1 mm and manufacturer heat range of 16
• Hex size of 16.0 mm for installation compatibility
• Resistance rating of 5000 ohms to reduce electrical interference

Detailed Features of the U-Groove Conventional Spark Plug

The Denso 3135 spark plug belongs to the U-Groove Conventional product line, which focuses on conventional spark plug designs enhanced with a U-groove ground electrode tip. This design increases the spark exposure area, promoting better ignition and combustion efficiency. The nickel ground electrode tip paired with a copper core center electrode ensures a balance of durability and excellent electrical conductivity. The flat seat and precise thread diameter provide a secure fit in compatible engines, while the 1.1 mm pre-gap size supports optimal spark gap for ignition performance. The 5000 ohm resistance helps minimize radio frequency interference, making it suitable for vehicles with sensitive electronic systems.

Compatible Vehicles and Applications

This spark plug is compatible with various Nissan and Volkswagen models, including:

• Nissan 240SX and D21 Pickup
• Volkswagen Beetle, EuroVan, Golf, and Jetta

It is designed for use in secondary ignition systems where reliable spark delivery is critical for engine performance and fuel efficiency.

Common Issues Addressed by Denso 3135 Spark Plug

• Misfiring or inconsistent engine ignition
• Reduced fuel efficiency due to incomplete combustion
• Difficulty starting the engine in cold conditions
• Engine hesitation or rough idling
• Interference with vehicle electronics caused by spark plug resistance

Installation Notes and Tips

When installing the Denso 3135 spark plug, ensure the following:

• Verify the spark plug gap is set to 1.1 mm if adjustment is needed
• Use a 16.0 mm socket for proper torque application
• Confirm the flat seat type matches the engine’s cylinder head design
• Apply anti-seize compound sparingly on threads if recommended by the vehicle manufacturer
• Torque to manufacturer specifications to avoid damage or improper sealing

Quality Assurance and Warranty

Denso spark plugs are manufactured to meet strict quality standards, ensuring consistent performance and durability. The 3135 spark plug undergoes rigorous testing for heat range, resistance, and electrode integrity. While specific warranty details depend on the vehicle manufacturer or installer, Denso products typically come with a limited warranty against manufacturing defects.