NGK 7658 Spark Plug

NGK Laser Iridium Spark Plug 7658

NGK Laser Iridium Spark Plug 7658 is built for precise ignition performance in select Volvo and Suzuki applications. It features an iridium center electrode tip, a nickel ground electrode, and a 0.044 in pre-gap to match OE specifications for the listed vehicles.

Key Features

• Laser Iridium spark plug from NGK’s Laser Iridium product line
• Iridium center electrode tip material for stable spark delivery
• Nickel ground electrode with standard tip design and standard configuration
• 0.044 in pre-gap size for OE-specified applications
• 14.00 mm thread diameter, 0.75 in reach, and flat seat type
• 5,000 ohm resistance and non-removable nut terminal
• NGK part number IFR6J11, stock number 7658

Product Details

NGK’s Laser Iridium line is positioned for OE-style ignition service, using an iridium center electrode to support consistent spark characteristics and long service intervals in the applications listed below. This NGK 7658 spark plug is specified for 2005-2011 Volvo XC90, 2007-2010 Volvo S80, 2006-2008 Suzuki Grand Vitara, 2004-2006 Suzuki XL-7, and 2001-2002 Suzuki Esteem. It cross-references DENSO Auto Parts 4504 for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent ignition output
• Misfire conditions related to plug wear or incorrect gap
• Reduced throttle response from degraded spark delivery
• Service interval replacement for OE-specified ignition maintenance

Installation Notes and Tips

• Verify the vehicle application before installation using the listed fitment data.
• Confirm the 0.044 in gap specification against OE requirements for the engine.
• Use the correct torque procedure for the cylinder head material and plug seat type.
• Inspect ignition coils, boots, and wiring during spark plug service to avoid repeat misfire concerns.
• For fitment searches, this part is listed for 2005-2011 Volvo XC90, 2007-2010 Volvo S80, and select Suzuki Grand Vitara, XL-7, and Esteem applications.

Quality Assurance

NGK is a long-established OE supplier and spark plug manufacturer with broad coverage across domestic and import vehicles in North America. The brand’s manufacturing focus on OE standards and application-specific engineering supports dependable service in the listed Volvo XC90, Volvo S80, and Suzuki models.