What are the NGK spark plug models?
3 Answers
NGK spark plug models start with a letter that represents the thread diameter of the spark plug. For example, B represents a 14MM thread, C represents a 10MM thread, and D represents a 12MM thread. Here's an example: For the BKR6E spark plug, BK indicates a 14MM thread diameter, ISO standard length spark plug, R stands for a resistor type, 6 represents the heat range, and E denotes a 19MM thread reach. Below are some considerations for selecting spark plugs: 1. When choosing a spark plug: It is essential to select a spark plug with the correct model number. 2. If it doesn't match the engine: Using a spark plug with an incorrect model number or heat range may cause unstable engine speed or poor driving performance. During high-speed operation, the engine produces significantly more power bursts per unit time compared to low and medium speeds.
NGK spark plug models are truly diverse, and I've studied them many times myself. Models like BRK6EQUP or LFR6AIX-11 have quite complex alphanumeric combinations. The initial letters B or L represent design codes, numbers like 6 indicate the heat range—lower heat ranges are prone to carbon buildup while higher ones dissipate heat better, and letters like E or IX refer to the electrode material type. Copper-core plugs like BKR6EK are affordable and practical, while iridium ones like DILFR6G last longer but are more expensive. You need to choose based on your engine—small displacement cars typically use heat range 5-6, while high-performance vehicles use 7-8. Choosing the wrong one can lead to unstable ignition and higher fuel consumption, so it's best to check your vehicle manual or the official website's matching tool. For regular replacements, I often recommend universal models like BRK6E, which offer good value for money and suit most Japanese and German cars.
Choosing the right NGK spark plug model depends on the specific situation, and I often help friends with this. The models have a heat range system, with numbers ranging from 2 to 10—the higher the number, the better the heat dissipation. Common models like R5671-7, with a heat range of 7, are suitable for regular family cars. Electrodes marked with IX indicate iridium, which can last several more years. If opting for cheaper copper electrode models like ZFR6F-11, they’re decent but less heat-resistant and prone to wear. The key is matching the model to the vehicle—don’t improvise. For example, SUVs or sports cars should use high heat range models like LFR7AIX, while compact cars can use heat range 5 models like BKR5EY. NGK’s official website allows you to search for vehicle-specific recommendations by entering the brand and year. Using the wrong spark plug can cause engine shaking and slow starts. Regular checks and replacements every 20,000 kilometers can save significant costs. Performance car enthusiasts can opt for iridium models to improve ignition efficiency, making acceleration smoother.
