Denso 3501 Spark Plug

Reliable Ignition Performance for BMW, Hyundai, and Kia Vehicles

The Denso Iridium Long Life 3501 spark plug is engineered to provide consistent ignition and enhanced durability for select BMW, Hyundai, and Kia models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and reliable engine operation.

• Iridium center electrode tip for improved ignition and longevity
• Platinum chip ground electrode tip for stable spark and wear resistance
• Copper core center electrode for optimal conductivity
• Standard ground configuration with a single nickel ground electrode
• Pre-gap size of 0.8 mm for precise spark gap
• Flat seat type with 12 mm thread diameter and 26.5 mm reach
• Hex size of 16.0 mm for easy installation
• Manufacturer heat range rating of 22
• Resistance of 5000 ohms to reduce electrical noise interference

About the Denso Iridium Long Life Spark Plug Line

The Iridium Long Life product line from Denso focuses on delivering extended durability and consistent ignition performance through the use of iridium and platinum materials. This spark plug line is designed to withstand high temperatures and maintain stable spark delivery over time, making it suitable for vehicles requiring reliable secondary ignition components. The 3501 part number exemplifies these qualities with its iridium center electrode and platinum chip ground electrode tip.

Technical Details and Compatibility

The Denso 3501 spark plug features a copper core center electrode that enhances electrical conductivity, paired with an iridium tip that resists wear and erosion. The ground electrode uses a platinum chip tip and nickel core material, providing a stable spark path and durability. With a pre-gap size of 0.8 mm and a flat seat design, this spark plug ensures proper fit and ignition characteristics. It is compatible with various BMW, Hyundai, and Kia models including the Accent, Elantra, M2, Optima, Rio, Santa Fe Sport, Sonata, Sorento, and Sportage.

Common Applications and Problem Resolution

• Replacement for worn or fouled spark plugs in compatible BMW, Hyundai, and Kia vehicles
• Improves ignition stability and reduces misfires
• Helps restore engine performance and fuel efficiency
• Addresses issues related to inconsistent spark delivery
• Suitable for vehicles experiencing rough idling or starting difficulties

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.8 mm if adjustment is necessary. Use a 16 mm socket wrench to install the spark plug, ensuring the 12 mm thread diameter and 26.5 mm reach match the engine specifications. Tighten to the manufacturer’s recommended torque to avoid damage to the flat seat and ensure proper sealing. It is advisable to replace spark plugs in sets to maintain balanced engine performance.

Quality Assurance and Warranty

Denso spark plugs are manufactured to meet strict quality standards and undergo rigorous testing to ensure durability and performance. The Iridium Long Life 3501 spark plug is designed for long service life and consistent ignition. Warranty coverage details should be confirmed with the vehicle manufacturer or authorized distributor.