Denso 671-6303 Direct Ignition Coil Boot Kit

Denso Direct Ignition Coil Boot Kit

Denso 671-6303 is a direct ignition coil boot kit built to match factory form, fit, color, and performance. It uses silicone boot material and a black finish for OE-style service on select Nissan and INFINITI applications.

Designed for vehicles such as the Nissan Altima, Maxima, Murano, 370Z, and Infiniti G37, this Denso First Time Fit COP boot set follows the original equipment layout for a precise replacement. The part number 671-6303 is a practical choice when servicing ignition coil boot wear on V6 applications that use a 6-boot configuration.

Key Features

• Direct ignition coil boot kit for coil-on-plug service
• Silicone boot material for heat-resistant electrical insulation
• Black boot color to match OE appearance
• Single terminal design with male/female terminal gender
• Length: 125.20
• Built to OE/OES standards for form, fit, color, and performance

Product Details

Denso’s First Time Fit COP boot sets are engineered to mirror the factory-installed boot design, making them a straightforward replacement for ignition service. The 671-6303 boot kit is listed for a wide range of Nissan and INFINITI models, including 2007-2015 Nissan 350Z and 370Z, 2009-2015 Nissan Altima, 2009-2015 Nissan Murano, 2009-2014 Nissan Maxima, 2013-2015 Nissan Pathfinder, 2011-2015 Nissan Quest, and multiple INFINITI G, M, FX, EX, Q, and QX applications.

This part cross-references no listed aftermarket part numbers in the provided data. Use 671-6303 when you need an OE-style ignition coil boot solution for select Nissan and INFINITI V6 platforms.

Common Issues This Part Can Address

• Cracked or heat-damaged ignition coil boots
• Misfire conditions caused by deteriorated boot insulation
• Hard starting related to weak coil-to-spark transfer
• Intermittent ignition performance from worn boot terminals
• Service replacement for aging coil-on-plug boot assemblies

Installation Notes

Verify engine application and boot configuration before installation. Confirm the vehicle uses the 6-boot layout shown in the fitment data and inspect the ignition coils, spark plug wells, and surrounding seals for contamination or damage before reassembly. Clean mating surfaces and ensure each boot seats fully on the coil and spark plug connection.

Quality Assurance

Denso states that First Time Fit COP boot sets are manufactured to meet or exceed OE/OES standards and are built to match factory-installed parts in form, fit, color, and performance. That makes 671-6303 a dependable OE-style service part for select Nissan and INFINITI ignition systems.

Compatible Vehicles

• Fits 2015 INFINITI Q40, N/A
• Fits 2014-2015 INFINITI Q50, N/A
• Fits 2014-2015 INFINITI Q60, N/A
• Fits 2014-2015 INFINITI Q70, N/A
• Fits 2015 INFINITI Q70L, N/A
• Fits 2014-2015 INFINITI QX50, N/A
• Fits 2014-2015 INFINITI QX60, N/A
• Fits 2014-2015 INFINITI QX70, N/A
• Fits 2009-2015 Nissan 370Z, N/A
• Fits 2010-2015 Nissan Altima, N/A
• Fits 2009-2015 Nissan Murano, N/A
• Fits 2013-2015 Nissan Pathfinder, N/A
• Fits 2011-2015 Nissan Quest, N/A
• Fits 2009-2014 Nissan Maxima, N/A
• Fits 2013 INFINITI EX37, N/A
• Fits 2013 INFINITI FX37, N/A
• Fits 2008-2013 INFINITI G37, N/A
• Fits 2013 INFINITI JX35, N/A
• Fits 2012-2013 INFINITI M35h, N/A
• Fits 2011-2013 INFINITI M37, N/A
• Fits 2008-2012 INFINITI EX35, N/A
• Fits 2009-2012 INFINITI FX35, N/A
• Fits 2011-2012 INFINITI G25, N/A
• Fits 2009-2010 INFINITI M35, N/A
• Fits 2007-2009 Nissan 350Z, N/A
• Fits 2008 INFINITI G35, N/A