Denso 3449 Spark Plug

Denso Iridium Long Life Spark Plug 3449

Denso Iridium Long Life spark plug 3449 is built for OE-level performance, durability, and emissions control. It is a direct-fit ignition component for select Suzuki applications, including Grand Vitara, XL-7, Esteem, and Vitara models.

Key Features

• Iridium center electrode tip for stable ignition performance
• Platinum chip ground electrode tip design
• 5000 ohm resistor for ignition noise suppression
• Flat seat design with 14.00 mm thread diameter and 19.00 mm reach
• 1.1 mm pre-gap size for specified applications
• Nickel ground electrode core and copper center electrode core
• Hex size: 16.0 mm; manufacturer heat range: 20

Product Details

The Denso Iridium Long Life line focuses on extended service life and consistent ignition performance in OE-matched applications. Part number 3449 is engineered to meet strict original-equipment standards for performance, durability, and emissions, making it a practical choice for Suzuki ignition service. This spark plug cross-references DENSO Auto Parts SVK20RZ11 and Suzuki 09482-00550 for the same application.

Compatible With 1999-2008 Suzuki Grand Vitara, N/A; 2005-2006 Suzuki XL-7, N/A; 2001-2002 Suzuki Esteem, N/A; and 1999-2001 Suzuki Vitara, N/A. The Denso 3449 is a fitment-specific replacement for these vehicles and should be matched to the listed engine application before installation.

Common Issues This Part May Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent spark delivery
• Misfire conditions related to plug wear or gap drift
• Reduced fuel efficiency from degraded ignition performance
• Emissions concerns tied to aging secondary ignition components

Installation Notes and Tips

Verify the vehicle’s engine application, thread diameter, reach, seat type, and pre-gap before installation. Use the specified gap and torque procedure for the engine, and inspect ignition coils, wires, and related secondary ignition parts during service. For fitment-based searches, this part is commonly referenced as a Suzuki Grand Vitara spark plug, Suzuki XL-7 spark plug, and Suzuki Vitara spark plug.

Quality Assurance

Denso manufactures this spark plug to OE performance, durability, and emissions standards. The Iridium Long Life design is intended to deliver consistent service in the listed Suzuki applications while maintaining the specifications required for proper ignition system operation.