Denso 3168 Spark Plug

Denso Double Platinum Spark Plug 3168

Denso Double Platinum spark plug 3168 is built for OE-style ignition performance, durability, and emissions control. It uses platinum on the center electrode and a platinum chip ground tip to support consistent spark delivery in a wide range of import and domestic applications, including Saab 9-5, Subaru Legacy, and Volvo XC70 fitments.

Key Features

• Double Platinum design with platinum center electrode tip and platinum chip ground tip
• 5000 ohm resistor for ignition noise suppression
• Copper center electrode core and nickel ground electrode core
• Pre-gapped to 1.1 mm for direct replacement use
• Flat seat, 14 mm thread diameter, 19.00 mm reach, and 16.0 mm hex size
• Manufactured to OE performance, durability, and emissions standards

Product Details

Denso 3168 is a secondary ignition spark plug engineered for stable combustion and long service life in properly matched applications. The Double Platinum construction helps maintain electrode integrity under repeated heat cycles, while the standard ground configuration supports reliable ignition performance in vehicles that specify this plug design. This part cross-references DENSO Auto Parts PK20PR11 for the same application.

Compatible With applications such as 2001-2009 Saab 9-5, 2003-2007 Volvo V70, and 1990-2009 Subaru Legacy, this spark plug also appears in fitments for Chevrolet Aveo, Suzuki Grand Vitara, and Mazda Protege models. The Denso 3168 part number is also referenced in OE and aftermarket catalogs for select Chrysler, Nissan, Subaru, Volvo, and Mitsubishi applications.

Common Issues This Part Can Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weak or inconsistent spark output
• Misfire conditions related to aged ignition components
• Reduced fuel economy from incomplete combustion
• Emissions test failures tied to degraded ignition performance

Installation Notes and Tips

Verify the vehicle’s required thread diameter, reach, seat type, and heat range before installation. This plug uses a flat seat and 14 mm thread, so it should only be installed in engines that call for those specifications. Check the gap against the engine manufacturer’s service data before use, even though the plug is pre-gapped at 1.1 mm. For fitment examples, this part fits 2004-2008 Chevrolet Aveo, 2004-2008 Volvo XC70, and 1993-2004 Subaru Impreza in listed Double Platinum applications.

Quality Assurance

Denso manufactures this spark plug to OE-level performance, durability, and emissions standards. The Double Platinum line is built for consistent ignition service in applications that require a platinum-tipped plug with factory-style specifications.