NGK 1637 Spark Plug

Reliable Ignition Performance for Hyundai and Kia Vehicles

The NGK Laser Iridium Spark Plug 1637 is engineered to deliver consistent ignition and efficient combustion for select Hyundai and Kia models. Designed with durable materials and precise specifications, this spark plug supports optimal engine performance and fuel efficiency.

• Iridium center electrode tip for enhanced durability and ignition
• Copper core center electrode for improved conductivity
• Standard ground electrode with nickel core material
• Pre-gap size of 0.044 inches for precise spark delivery
• Flat seat type with 14mm thread diameter and 26.5mm reach
• Non-removable nut electrical terminal type
• Manufacturer heat range rating of 5
• Hex size of 5/8 inch for installation compatibility

About the NGK Laser Iridium Spark Plug Line

The Laser Iridium Spark Plug line from NGK combines iridium's high melting point and fine electrode design to provide stable ignition and longer service life. This technology reduces electrode wear and maintains consistent spark performance, making it suitable for modern engines requiring precise ignition timing and durability. The 1637 part number is a specific fitment within this line, tailored for certain Hyundai and Kia models.

Technical Details and Specifications

This spark plug features a copper core center electrode with an iridium tip, which enhances electrical conductivity and wear resistance. The ground electrode uses nickel core material with a standard tip design and configuration, ensuring reliable spark gap stability. The pre-gap is set at 0.044 inches, optimized for efficient combustion. The flat seat and 14mm thread diameter with a 26.5mm reach ensure proper fitment and sealing in compatible engines. The non-removable nut terminal type simplifies installation and connection.

Compatible Hyundai and Kia Models

• Hyundai Borrego
• Hyundai Genesis
• Hyundai Magentis
• Kia Optima
• Kia Rondo
• Kia Santa Fe

Common Issues Addressed by NGK Laser Iridium Spark Plug 1637

• Engine misfires due to worn or fouled spark plugs
• Reduced fuel efficiency from inconsistent ignition
• Hard starting or rough idling conditions
• Increased emissions caused by incomplete combustion
• Premature electrode wear affecting spark quality

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.044 inches if adjustment is necessary. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended specification to avoid damage to the threads or improper sealing. The 5/8 inch hex size allows for standard spark plug socket compatibility. Ensure the ignition system is off and the engine is cool before replacing spark plugs.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable performance and durability. The Laser Iridium Spark Plug 1637 undergoes rigorous testing for heat range, electrode wear, and electrical resistance (5000 ohms) to maintain consistent ignition. Warranty coverage details should be confirmed with the vehicle manufacturer or NGK documentation.