NGK 90644 Spark Plug

NGK Laser Iridium Spark Plug for Cruze

NGK 90644 is a Laser Iridium High Ignitability spark plug built for precise ignition performance and OE-style durability. It is listed for the 2017 Chevrolet Cruze and matches the factory high-ignitability application with a 0.028" pre-gap and 5000 ohm resistance.

The Laser Iridium High Ignitability line focuses on stable spark delivery and original-equipment fitment standards. For 2017 Chevrolet Cruze service, NGK 90644 supports consistent combustion performance in a direct-replacement spark plug format.

Key Features

• Laser Iridium center electrode tip for efficient spark delivery
• High Ignitability OE-equivalent design for the 2017 Chevrolet Cruze
• 0.028" pre-gap for factory-style installation
• 5000 ohm resistance for ignition system compatibility
• Copper center and ground electrode core materials
• Thin square ground electrode tip design with single ground electrode
• 12.00 mm thread diameter, 0.98 reach, and 0.5511811024 hex size
• NGK part number 90644, also identified as SILNAR9C7DG

Product Details

NGK 90644 is a Laser Iridium spark plug engineered around OE specifications for the 2017 Chevrolet Cruze. The iridium center electrode tip helps maintain a focused spark point, while the copper core construction supports heat transfer and stable operation. With a manufacturer heat range of 9 and a stud terminal, this spark plug is specified for direct replacement service where the original application calls for a high-ignitability design. NGK 90644 is a practical choice when servicing a 2017 Chevrolet Cruze and replacing worn plugs with an OE-style equivalent.

This part cross-references NGK 90644 for the same application.

Common Issues This Part Can Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weakened ignition performance
• Misfire conditions related to plug wear or gap drift
• Reduced throttle response from inconsistent spark delivery
• Service interval replacement for the 2017 Chevrolet Cruze

Installation Notes

Verify the vehicle application before installation and confirm the specified 0.028" gap if adjustment is required. Use the correct torque procedure for the cylinder head material and inspect ignition coils, boots, and wiring during service. For the 2017 Chevrolet Cruze, replace plugs with the same high-ignitability style specified by the OE application to maintain proper ignition performance.

Quality Assurance

NGK is a major OE spark plug supplier in North America with long-standing manufacturing experience across automotive applications. Part number 90644 is built to original-equipment standards for durability and operational consistency.