Denso 3422 Spark Plug

Reliable Ignition Performance for Acura, Honda, and Saturn Vehicles

The Denso Iridium Long Life 3422 spark plug is engineered to provide consistent ignition and enhanced durability for select Acura, Honda, and Saturn 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
• Thick nickel ground electrode core for durability
• Copper center electrode core for optimal conductivity
• Pre-gap size of 1.1 mm for precise spark gap
• Flat seat type with 14 mm thread diameter and 19 mm reach
• Hex size of 16 mm for standard installation tools
• Manufacturer heat range 16 suitable for specified vehicle applications

About the Denso Iridium Long Life Spark Plug Line

The Iridium Long Life product line from Denso focuses on delivering extended service intervals and stable ignition performance. Utilizing iridium and platinum materials in the electrode tips, these spark plugs are designed to resist wear and maintain consistent spark quality over time. The 3422 part number exemplifies this approach, combining durable core materials with precise electrode design to meet the demands of modern engines in Acura MDX, Honda Odyssey, Pilot, Ridgeline, and Saturn Vue models.

Technical Details and Benefits

The Denso 3422 spark plug features a copper core center electrode that enhances electrical conductivity, paired with an iridium tip that provides a fine spark for efficient combustion. The ground electrode incorporates a platinum chip tip and a thick nickel core, improving electrode life and spark stability. With a pre-gap size of 1.1 mm and a flat seat design, this spark plug ensures proper fit and reliable ignition in compatible engines. The 16 mm hex size and 19 mm reach facilitate straightforward installation and secure seating.

Common Applications and Problem Solving

• Replacement for worn or fouled spark plugs in Acura MDX, Honda Odyssey, Pilot, Ridgeline, and Saturn Vue
• Addresses misfires and rough idling caused by degraded spark plugs
• Improves cold start performance and throttle response
• Helps reduce engine hesitation and poor fuel economy
• Supports stable ignition under varied driving conditions

Installation Notes and Tips

Ensure the engine is cool before removing old spark plugs. Use a torque wrench to tighten the Denso 3422 spark plug to the manufacturer’s recommended specifications to avoid damage. Verify the pre-gap size of 1.1 mm before installation, although the plug is pre-gapped from the factory. Compatible with Acura MDX, Honda Odyssey, Pilot, Ridgeline, and Saturn Vue models, this spark plug requires a 16 mm socket for installation.

Quality Assurance and Warranty

Denso manufactures the 3422 spark plug to meet strict OEM standards, ensuring reliable performance and durability. The use of iridium and platinum materials contributes to extended service life compared to conventional spark plugs. Warranty coverage details should be confirmed with the vehicle manufacturer or parts distributor.