NGK 5547 Spark Plug

NGK Laser Platinum Spark Plug Overview

The NGK Laser Platinum Spark Plug 5547 is engineered for reliable ignition performance in select Audi and Volkswagen models. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Part Number: 5547 (PFR6W-TG)
• Compatible with Audi A6 Quattro, A8 Quattro, Q7, S5, S6, S8 and Volkswagen Touareg
• Center electrode tip made of platinum for enhanced durability
• Copper core in both center and ground electrodes for optimal conductivity
• Three ground electrodes with standard design and flat seat type
• Pre-gap size of 0.036 inches and reach of 0.75 inches
• Non-removable nut electrical terminal type
• Hex size of 5/8 inch and thread diameter of 14 mm
• Manufacturer heat range rating of 6

Detailed Product Description

The NGK Laser Platinum Spark Plug 5547 features a platinum center electrode tip that provides enhanced wear resistance and stable ignition over time. Both the center and ground electrodes have copper cores, which improve electrical conductivity and heat dissipation. The spark plug includes three ground electrodes with a standard tip design, contributing to consistent spark generation and combustion efficiency. Its flat seat type and precise pre-gap of 0.036 inches ensure proper sealing and optimal spark gap for the ignition system.

This spark plug is designed with a non-removable nut electrical terminal and a 5/8 inch hex size for secure installation. The thread diameter measures 14 mm with a reach of 0.75 inches, matching OEM specifications for the compatible Audi and Volkswagen models. The insulator height is 50.50 mm, and the manufacturer heat range is rated at 6, suitable for the specified vehicle applications.

About the NGK Laser Platinum Spark Plug Line

The Laser Platinum Spark Plug line by NGK is designed to offer a balance of durability and performance. The use of platinum on the center electrode tip extends the service life compared to standard spark plugs, while the copper core electrodes maintain efficient electrical conductivity. This product line is suitable for vehicles requiring reliable ignition components that meet OEM standards, such as the Audi and Volkswagen models listed.

Applications and Common Issues Addressed

• Replacement for worn or fouled spark plugs in Audi A6 Quattro, A8 Quattro, Q7, S5, S6, S8, and Volkswagen Touareg
• Helps resolve misfires and rough idling caused by degraded spark plugs
• Improves cold start performance and throttle response
• Reduces engine hesitation and improves fuel efficiency
• Prevents ignition system failures related to electrode wear

Installation Notes and Tips

• Verify compatibility with your specific Audi or Volkswagen model before installation
• Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage
• Check and adjust the spark plug gap if necessary, though the pre-gap is factory set at 0.036 inches
• Inspect ignition components for wear or damage during replacement
• Apply anti-seize compound sparingly on threads if recommended by the vehicle manufacturer

Quality Assurance and Warranty

NGK spark plugs, including the Laser Platinum Spark Plug 5547, are manufactured to meet strict quality standards for ignition components. The use of copper core electrodes and platinum tips ensures consistent performance and durability. While specific warranty details may vary, NGK products typically come with manufacturer-backed quality assurance to support reliable operation in compatible Audi and Volkswagen vehicles.