4 Pc Ngk 3521 Iridium Ix Spark Plugs For 31600012 31600085 4132 4191 5366 5633 90793-20123 90793-20125 90793-20151 90793-2B125 9

Frequently Asked Questions

• Q: What are the dimensions of the NGK 3521 Spark Plugs? A: The NGK 3521 Spark Plugs measure three point thirty-one inches in length, zero point ninety-four inches in width, and three point thirty-two inches in height. These compact dimensions make them suitable for various vehicle models.
• Q: What is the material of the NGK Iridium IX Spark Plugs? A: The NGK Iridium IX Spark Plugs are made from iridium, a highly durable material known for its high melting point and resistance to wear. This ensures long-lasting performance and reliable ignition.
• Q: How many spark plugs are included in the package? A: The package includes four spark plugs, providing a complete set for most vehicles that require replacements. This four pack is ideal for maintenance and repairs.
• Q: How do I install NGK 3521 Spark Plugs? A: You can install NGK 3521 Spark Plugs by removing the old spark plugs from your engine and replacing them with the new ones. Ensure you use the correct torque specifications during installation for optimal performance.
• Q: Are these spark plugs compatible with my vehicle? A: Yes, these spark plugs are compatible with various vehicle models. It's recommended to confirm your vehicle's fitment using Amazon's Confirmed Fit feature.
• Q: Can I use these spark plugs in any engine? A: No, these spark plugs are designed for specific engine models. Always check your vehicle’s requirements to ensure compatibility before purchasing.
• Q: How should I store NGK Spark Plugs? A: Store NGK Spark Plugs in a cool, dry place to prevent moisture and corrosion. Keeping them in their original packaging can help protect them until installation.
• Q: Do I need to clean the spark plugs before installation? A: No, you do not need to clean the NGK Spark Plugs before installation. They come pre-gapped and ready for use, ensuring optimal performance right out of the box.
• Q: What is the shelf life of spark plugs? A: Spark plugs can last for several years if stored properly. However, it's best to use them within a year of purchase to ensure maximum performance.
• Q: How do I troubleshoot if my engine misfires? A: If your engine misfires, check the spark plugs first. Ensure they are installed correctly and replace them if they show signs of wear or damage.
• Q: What if the spark plugs arrive damaged? A: If the spark plugs arrive damaged, you can return them for a replacement or refund. Always check the product upon delivery and contact customer service for assistance.
• Q: Are these spark plugs covered by a warranty? A: Yes, NGK Spark Plugs typically come with a manufacturer's warranty. Check the packaging or contact customer support for specific warranty details.
• Q: What is the difference between iridium and platinum spark plugs? A: Iridium spark plugs, like the NGK 3521, offer better performance and longevity compared to platinum plugs. Iridium has a higher melting point and durability, making it ideal for high-performance engines.
• Q: Is there a recommended interval for replacing spark plugs? A: Yes, it's generally recommended to replace spark plugs every thirty to one hundred thousand miles, depending on your vehicle's specifications and the type of spark plugs used.
• Q: Can I mix different brands of spark plugs? A: No, it’s not advisable to mix different brands of spark plugs. Consistency in brand and type ensures optimal engine performance and reliability.