NGK 54309 Spark Plug Wire Set

NGK Spark Plug Wire Set for Mercedes-Benz

Restore consistent ignition performance with the NGK Spark Plug Wire Set, part number 54309. Built with blue silicone insulation and a tinned copper core, this specific-fit wire set is made for select Mercedes-Benz 380-series applications and supports reliable spark delivery with noise suppression.

Key Features

• NGK Spark Plug Wire Set, part number 54309
• Specific fit for select Mercedes-Benz 380SE, 380SL, 380SEC, and 380SEL applications
• Blue silicone insulation for heat-resistant wire protection
• Tinned copper core for stable electrical conductivity
• Noise suppression type included
• Insulation outside diameter: 7.00
• NGK RC-EUC048 reference number

Product Details

NGK brings extensive OE ignition experience to this wire set, with manufacturing focused on durability and operational performance to OE standards. The 54309 wire set is built for direct replacement use on 1982-1985 Mercedes-Benz 380SL, 1982-1983 Mercedes-Benz 380SEC and 380SEL, and 1984-1985 Mercedes-Benz 380SE. This makes it a practical choice when servicing ignition systems on classic Mercedes-Benz 380SE, 380SL, 380SEC, and 380SEL models.

This part cross-references DENSO Auto Parts 671-8129 for the same application.

What It Helps Address

• Misfires caused by worn or degraded plug wires
• Weak spark transfer from aging ignition leads
• Electrical noise that can interfere with ignition performance
• Cracked or heat-damaged insulation on older wire sets
• Hard starting related to inconsistent spark delivery

Installation Notes and Tips

Verify the vehicle application before installation, since this is a specific-fit NGK 54309 wire set. Match each lead to the correct cylinder routing and follow the factory firing order for the Mercedes-Benz 380SE, 380SL, 380SEC, or 380SEL. Inspect distributor cap and ignition coil components at the same time to avoid repeat ignition issues.

Quality Assurance

NGK is known for OE-focused ignition components and global automotive coverage. The 54309 spark plug wire set is manufactured to support durability and consistent performance in replacement service for select Mercedes-Benz applications.