Denso 3142 Spark Plug

Denso Double Platinum Spark Plug 3142

Denso Double Platinum spark plug 3142 is built for OE-level ignition performance, durability, and emissions control. It is a direct-fit spark plug for a wide range of import and domestic applications, including Audi A4, Acura NSX, and Honda Integra fitments.

The Double Platinum line focuses on stable spark delivery and long service life through platinum on the center electrode and a platinum chip ground tip. For drivers searching for a Denso 3142 spark plug for Audi A4 or Acura NSX applications, this design supports consistent ignition performance under everyday driving conditions.

Key Features

• Double Platinum design with platinum center electrode tip and platinum chip ground electrode tip
• 5000 ohm resistor for ignition noise suppression
• Copper center electrode core for efficient heat transfer
• Nickel ground electrode core with standard ground configuration
• Pre-gapped to 1.1 mm for specified applications
• Flat seat, 14.00 mm thread diameter, 19.00 mm reach, and 16.0 mm hex size
• Manufactured to OE performance, durability, and emissions standards

Product Details

Denso Double Platinum 3142 is engineered as an OE-style spark plug for vehicles that require a flat-seat plug with a 14 mm thread and 19 mm reach. The platinum center electrode and platinum chip ground tip help maintain consistent spark characteristics over time, while the copper core supports heat dissipation. This makes the Denso 3142 a practical choice for drivers maintaining ignition systems on Audi A4, Audi A6, Acura Integra, and related applications.

This part cross-references DENSO Auto Parts PK20PR-L11 and Honda 98079-561-4H for the same application.

Common Issues This Part Helps Address

• Rough idle caused by worn spark plugs
• Hard starting from weak or inconsistent ignition output
• Misfire conditions related to electrode wear
• Reduced fuel economy from degraded spark performance
• Emissions concerns tied to aging ignition components

Installation Notes and Tips

Verify thread diameter, reach, seat type, and heat range before installation. Confirm the specified gap matches the engine requirement, and inspect ignition coils, plug wires, and boots for wear before fitting new plugs. Use the vehicle service manual for torque specifications and installation procedure.

Compatible With 2009-2012 Audi Q5, 2011 Audi S5, 2010-2011 Saab 9-3, 2010-2011 Saab 9-3X, 2005-2007 Chevrolet Cobalt, 2004-2007 Saturn Ion, 2002-2006 Audi A4 Quattro, 1994-2005 Acura NSX, 2002-2005 Audi A4, 2002-2004 Audi A6, 2000-2004 Audi A6 Quattro, 2004 Kia Spectra, 2001-2002 Audi Allroad Quattro, 2002 Audi S4, 2001-2002 Kia Rio, 1998-2002 Kia Sportage, 2000-2001 Acura Integra, 1997-1998 Acura Integra, 2000 Audi TT, and 1996 Acura SLX.

Quality Assurance

Denso manufactures this spark plug to strict OE performance, durability, and emissions standards. The Double Platinum line is designed for dependable ignition service in applications that call for a platinum-tipped OE-style replacement.