Denso 3441 Spark Plug

Denso Iridium Long Life Spark Plug 3441

Denso 3441 is an Iridium Long Life spark plug built for OE-level performance, durability, and emissions control. It is a direct-fit ignition component for select Mercedes-Benz, Mitsubishi, Smart, Kia, and Dodge applications, including Mercedes-Benz C300, E350, ML350, and related models.

Key Features

• Iridium center electrode tip for stable ignition performance
• Platinum chip ground electrode tip design for extended service life
• 5000 ohm resistance for proper ignition system operation
• Copper core center electrode and nickel ground electrode core
• 0.8 mm pre-gap size for OE-style setup
• Flat seat design, 12.00 mm thread diameter, 26.50 mm reach, and 16.0 mm hex size
• Manufactured to meet strict OE performance, durability, and emissions standards

Product Details

The Denso Iridium Long Life line is engineered for drivers who want a spark plug that follows original equipment specifications closely. Part number 3441 uses an iridium center electrode to support consistent spark delivery, while the platinum chip ground design helps maintain long service intervals. This spark plug is a strong match for long-tail searches such as Denso 3441 spark plug for Mercedes-Benz E350 2006-2011, Mercedes-Benz C300 2008-2012 spark plug replacement, and Mitsubishi Outlander Iridium Long Life ignition service. This part cross-references Denso Auto Parts SXU22HDR8 for the same application.

Vehicle Fitment

• Fits 2013-2016 Mitsubishi Outlander, N/A
• Fits 2007-2011 Mitsubishi Outlander, N/A
• Fits 2013-2015 Mercedes-Benz C250, N/A
• Fits 2009-2015 Mercedes-Benz G550, N/A
• Fits 2013-2015 Mercedes-Benz SLK250, N/A
• Fits 2008-2015 Smart Fortwo, N/A
• Fits 2010-2013 Mercedes-Benz S400, N/A
• Fits 2008-2012 Mercedes-Benz C300, N/A
• Fits 2007-2012 Mercedes-Benz GL450, N/A
• Fits 2008-2012 Mercedes-Benz GL550, N/A
• Fits 2010-2012 Mercedes-Benz GLK350, N/A
• Fits 2011-2012 Mercedes-Benz SL550, N/A
• Fits 2007-2009 Mercedes-Benz SL550, N/A
• Fits 2010-2011 Kia Soul, N/A
• Fits 2010-2011 Mercedes-Benz C350, N/A
• Fits 2006-2008 Mercedes-Benz C350, N/A
• Fits 2007-2011 Mercedes-Benz CLS550, N/A
• Fits 2006-2011 Mercedes-Benz E350, N/A
• Fits 2007-2011 Mercedes-Benz E550, N/A
• Fits 2006-2011 Mercedes-Benz ML350, N/A
• Fits 2010-2011 Mercedes-Benz ML450, N/A
• Fits 2008-2011 Mercedes-Benz ML550, N/A
• Fits 2006-2011 Mercedes-Benz R350, N/A
• Fits 2007-2011 Mercedes-Benz S550, N/A
• Fits 2009-2011 Mercedes-Benz SLK300, N/A
• Fits 2005-2011 Mercedes-Benz SLK350, N/A
• Fits 2007-2010 Mercedes-Benz CL550, N/A
• Fits 2006-2009 Mercedes-Benz CLK350, N/A
• Fits 2007-2009 Mercedes-Benz CLK550, N/A
• Fits 2007-2008 Dodge Sprinter 2500, N/A
• Fits 2007-2008 Dodge Sprinter 3500, N/A
• Fits 2006-2008 Mercedes-Benz SLK280, N/A
• Fits 2006-2007 Mercedes-Benz C230, N/A
• Fits 2006-2007 Mercedes-Benz C280, N/A

Installation Notes and Tips

Verify the thread diameter, reach, seat type, and pre-gap before installation. Use the vehicle service specification for final gap verification and torque, and inspect ignition coils, boots, and plug wells for wear or contamination during service. For Mercedes-Benz C300, E350, and ML350 applications, confirm the engine code and OE cross-reference before ordering.

Quality Assurance

Denso manufactures this spark plug to OE performance, durability, and emissions standards, with materials selected for consistent ignition and long service life. The Iridium Long Life design reflects Denso’s OE-focused approach to secondary ignition components.