Denso 671-8129 Spark Plug Wire Set

Denso 7mm Spark Plug Wire Set for Mercedes-Benz

Denso 671-8129 is a 7mm spark plug wire set built to match factory-installed wire sets in form, fit, color, and performance. It is a direct OE-style ignition wire replacement for select Mercedes-Benz 380SE, 380SL, 380SEC, 380SEL, 380SLC, 500SEC, and 500SEL applications with a screw type distributor cap.

Key Features

• 7mm insulation outside diameter for OE-style ignition wire routing
• LR silicone spark plug boot material for heat resistance and durability
• Female distributor coil end terminal type
• 180-degree spark plug end boot design
• Female spark plug end terminal type
• Built to meet or exceed OE/OES standards in construction
• Direct replacement for Mercedes-Benz ignition wire set applications

Product Details

The Denso First Time Fit line is engineered as an OE replacement line for drivers who want factory-style fitment and consistent ignition performance. Part number 671-8129 follows the original wire set layout and uses materials selected to match the demands of the ignition system. For shoppers searching for a Mercedes-Benz 380SE spark plug wire set, Mercedes-Benz 380SL ignition wire replacement, or a Denso 671-8129 wire set for classic Mercedes-Benz V8 applications, this part is built for those exact vehicle-specific needs.

This part cross-references ACDelco 908A and Bosch 09028 for the same application.

Common Issues This Part Can Address

• Misfires caused by worn or heat-damaged ignition wires
• Hard starting related to weak spark delivery
• Rough idle from deteriorated wire insulation or terminals
• Intermittent ignition performance from aging OE wire sets
• Voltage leakage from cracked or brittle plug wire boots

Installation Notes and Fitment

Fits 1984-1985 Mercedes-Benz 380SE, N/A; Compatible with Screw Type Distributor Cap; 7mm.

Fits 1981-1985 Mercedes-Benz 380SL, N/A; Compatible with Screw Type Distributor Cap; 7mm.

Fits 1984-1985 Mercedes-Benz 500SEC, N/A; Compatible with Screw Type Distributor Cap; 7mm.

Fits 1984-1985 Mercedes-Benz 500SEL, N/A; Compatible with Screw Type Distributor Cap; 7mm.

Fits 1982-1983 Mercedes-Benz 380SEC, N/A; Compatible with Screw Type Distributor Cap; 7mm.

Fits 1981-1983 Mercedes-Benz 380SEL, N/A; Compatible with Screw Type Distributor Cap; 7mm.

Fits 1981 Mercedes-Benz 380SLC, N/A; Compatible with Screw Type Distributor Cap; 7mm.

Verify distributor cap style and wire routing before installation. Match each lead to the original routing path to maintain proper ignition order and clearance from heat sources.

Quality Assurance

Denso First Time Fit ignition wire sets are produced to OE-style standards for form, fit, color, and performance. The 671-8129 is designed as a direct replacement for select Mercedes-Benz ignition systems and follows the construction expectations of original-equipment service parts.