Denso 4718 Spark Plug

Denso Iridium TT Spark Plug 4718

Denso Iridium TT 4718 is an OE-style spark plug built for steady ignition performance, durability, and responsive power delivery. It combines iridium and platinum twin-tip electrode technology with a copper core and nickel ground electrode for efficient spark transfer in a wide range of Ford, Chevrolet, GMC, Buick, Mazda, and Lincoln applications.

The Iridium TT line focuses on long service life with a fine-wire center electrode and twin-tip ground design that supports consistent combustion. For drivers searching for a Denso 4718 spark plug for Ford Escape, Chevrolet Colorado, or Mazda 3 applications, this part matches the factory-style tapered seat, 14 mm thread diameter, and 25.00 mm reach used in many listed vehicles.

Key Features

• Iridium center electrode tip for precise spark delivery
• Platinum twin-tip ground electrode design for stable ignition performance
• Copper core center electrode and nickel ground core for efficient heat transfer
• 5000 ohm resistance for ignition system compatibility
• Pre-gapped at 1.0 mm
• Tapered seat, 14 mm thread diameter, 25.00 mm reach, and 16 mm hex size
• Manufacturer heat range 16

Product Details

Denso Iridium TT 4718 is engineered to balance OE-style durability with the sharper ignition response associated with fine-wire electrode construction. The iridium center tip and platinum twin-tip ground configuration help maintain a consistent spark kernel, while the copper core supports thermal control. This makes the plug a practical choice for drivers maintaining factory ignition performance on vehicles such as the Ford Fusion, GMC Terrain, Chevrolet Equinox, and Mazda 6.

This part cross-references DENSO Auto Parts ITV16TT for the same application.

What It Helps Address

• Rough idle caused by worn spark plugs
• Hard starting from weakened ignition output
• Misfire conditions tied to aged secondary ignition components
• Reduced throttle response from inconsistent combustion
• Loss of fuel efficiency related to degraded spark quality

Installation Notes and Fitment

Compatible With 2020-2023 Ford Escape, 2021-2023 Lincoln Corsair, 2021-2022 Chevrolet Colorado, 2018-2019 Chevrolet Colorado, 2021-2022 Ford Transit Connect, 2018 Ford Transit Connect, 2021-2022 GMC Canyon, 2018-2019 GMC Canyon, 2021 Chevrolet Blazer, 2019 Chevrolet Blazer, 2021 GMC Acadia, 2018-2019 GMC Acadia, 2017-2020 Ford Fusion, 2018-2019 Buick Envision, 2018-2019 Buick LaCrosse, 2018-2019 Chevrolet Impala, 2017-2018 Ford C-Max, 2017 Buick Envision, 2013-2017 Buick Regal, 2011 Buick Regal, 2015-2017 Cadillac ATS, 2013 Cadillac ATS, 2015-2017 Chevrolet Colorado, 2008-2017 Chevrolet Equinox, 2014-2017 Chevrolet Impala, 2009-2017 Ford Escape, 2001-2004 Ford Escape, 2017 GMC Acadia, 2009 GMC Acadia, 2015-2017 GMC Canyon, 2010-2017 GMC Terrain, 2011-2017 Lincoln MKZ, 2012-2016 Buick LaCrosse, 2010 Buick LaCrosse, 2005-2008 Buick LaCrosse, 2012-2016 Buick Verano, 2016 Chevrolet Malibu Limited, 2014-2016 Ford C-Max, 2006-2016 Ford Fusion, 2012-2015 Chevrolet Captiva Sport, 2013-2015 Chevrolet Malibu, 2008-2009 Chevrolet Malibu, 2004-2006 Chevrolet Malibu, 2013-2015 Mazda 5, 2008-2010 Mazda 5, 2013-2014 Buick Verano, 2006-2013 Mazda 3, 2012-2013 Mazda 3, 2013 Mazda 3 Sport, 2006-2013 Mazda 6, 2012 Buick Regal, 2010-2012 Mazda CX-7, 2011 Ford Escape, 2009-2011 Mazda Tribute, 2001-2002 Mazda Tribute, 2009-2011 Mercury Mariner, 2006-2011 Mercury Milan, 2008-2010 Chevrolet Cobalt, 2005 Chevrolet Cobalt, 2008-2010 Chevrolet HHR, 2006 Chevrolet HHR, 2009-2010 Saturn Sky, 2007 Saturn Sky, 2009-2010 Suzuki Grand Vitara, 2009 Buick Enclave, 2007-2009 Cadillac CTS, 2005-2009 Cadillac SRX, 2006-2009 Cadillac STS, 2009 Chevrolet Traverse, 2007-2009 Pontiac G6, 2008-2009 Pontiac G8, 2007-2009 Pontiac Solstice, 2008-2009 Pontiac Torrent, 2007-2009 Saturn Aura, 2009 Saturn Outlook, 2009 Saturn Vue, 2007-2009 Suzuki XL-7, 2004-2006 Buick Rendezvous, 2000-2004 Ford Focus, 2002-2004 Oldsmobile Alero, 1998-2003 Ford Escort, 2002 Chevrolet Trailblazer, 2002 GMC Envoy, 1999-2002 Mercury Cougar, 2002 Oldsmobile Bravada, 2001 Saturn L100, 2001 Saturn L200, 1995-2000 Ford Contour, 1997-2000 Mercury Mystique, 2000 Saturn LS, 2000 Saturn LS1, and 2000 Saturn LW1.

Before installation, confirm the tapered seat design, 14 mm thread diameter, 25.00 mm reach, and 16 mm hex match the engine specification. Verify the vehicle’s engine code where listed, including notes for Mazda 3, Mazda 3 Sport, Buick Verano, and Ford Escape applications. Use the vehicle service procedure for torque and gap verification.

Quality Assurance

Denso Iridium TT spark plugs are built around a fine-wire iridium center electrode and platinum twin-tip ground design to support consistent ignition performance and OE-style durability. The 4718 part number is used across a broad range of domestic and import applications, including Ford Escape, Chevrolet Colorado, and Mazda 3 fitments.