NGK 52115 Spark Plug Wire Set

NGK Spark Plug Wire Set for Ford and Mercury

The NGK Spark Plug Wire Set 52115 is a specific-fit ignition wire set built for select Ford Mustang, Ford Thunderbird, and Mercury Cougar applications. It uses blue silicone insulation, an 8.00 mm outside diameter, and noise suppression construction to support stable ignition performance and reduced electrical interference.

Key Features

• Specific-fit NGK spark plug wire set for confirmed vehicle applications
• Blue silicone insulation for heat resistance and durability
• 8.00 mm insulation outside diameter
• Noise suppression type construction
• SMag core material for ignition signal transfer
• NGK part number 52115 / RC-FDZ040

Product Details

NGK Spark Plug Wire Set 52115 is part of NGK’s ignition product line, which includes spark plugs, glow plugs, ignition coils, coil-on-plug boots, and wire sets. NGK draws on long-term OE experience and global manufacturing standards to produce replacement ignition components for domestic and import vehicles. This wire set is engineered as a direct-fit replacement for select Ford Mustang, Ford Thunderbird, and Mercury Cougar models, including 1994-1998 Ford Mustang, 1999 Ford Mustang built to 1/4/1999, 1997 Ford Thunderbird, 1994-1996 Ford Thunderbird with California Emission System, 1997 Mercury Cougar, and 1994-1996 Mercury Cougar with California Emission System.

This part cross-references BBB Industries 52115 for the same application.

Common Problems This Part Can Address

• Misfires caused by worn or damaged ignition wires
• Hard starting related to weak spark delivery
• Rough idle from inconsistent ignition signal transfer
• Electrical noise that can interfere with ignition performance
• Heat-related wire deterioration in older ignition systems

Installation Notes and Tips

Verify engine configuration and emission system details before installation, especially on 1994-1996 Ford Thunderbird and Mercury Cougar California Emission System applications. Match each wire to the correct cylinder routing and keep the wires separated from hot exhaust components and sharp edges. Confirm the NGK 52115 part number and vehicle fitment before replacing the existing ignition wire set.

Quality Assurance

NGK is known for OE-focused ignition engineering and manufactures premium ignition products to meet durability and operational performance standards used in original equipment applications. The 52115 wire set reflects that OE-oriented approach for select Ford Mustang, Ford Thunderbird, and Mercury Cougar fitments.