Denso 671-4178 Spark Plug Wire Set

Denso 7mm Spark Plug Wire Set 671-4178

Denso 7mm ignition wire set 671-4178 is built to match factory-installed wire sets in form, fit, color, and performance. It is a direct OE-style replacement for select Isuzu and Honda applications, including Rodeo, Passport, Pickup, Amigo, Trooper, and Impulse models.

The Denso 7mm product line focuses on OE-level fitment and consistent ignition performance for vehicles that require a 7mm wire diameter. Part number 671-4178 is a practical choice when replacing aging spark plug wires on import trucks and SUVs.

Key Features

• 7.00 mm insulation outside diameter for OE-style routing and fit
• Silicone spark plug boot material for heat resistance and flexibility
• 180-degree spark plug end boot design for tight engine bay routing
• Female spark plug end terminal type
• Male distributor/coil end terminal type
• Built to meet or exceed OE/OES standards in construction

Detailed Product Overview

Denso 671-4178 is a spark plug wire set engineered for direct replacement on vehicles that originally used a 7mm ignition lead design. The wire set is specified for 1991-1997 Isuzu Rodeo, 1994-1996 Honda Passport, 1986-1995 Isuzu Pickup, 1989-1994 Isuzu Amigo, 1986-1991 Isuzu Trooper, and 1988-1989 Isuzu Impulse. It is also a fitment match for related import applications where OE-style terminal orientation and boot geometry are required.

This part cross-references NGK IE44 and Bosch 09167 for the same application. If you are searching for Denso 671-4178 spark plug wires for Isuzu Rodeo or Honda Passport ignition service, this wire set provides the correct 7mm configuration and terminal layout for those vehicles.

Common Problems This Part Can Address

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

Installation Notes and Tips

Verify engine application and wire routing before removal of the old set. Match each lead to the correct cylinder and coil or distributor connection, and confirm the 180-degree spark plug boot clears nearby components. For best results, inspect spark plugs, distributor cap, and ignition coil condition during replacement so the new wire set is installed into a clean ignition system.

Compatible With 1991-1997 Isuzu Rodeo, 1994-1996 Honda Passport, 1986-1995 Isuzu Pickup, 1989-1994 Isuzu Amigo, 1986-1991 Isuzu Trooper, and 1988-1989 Isuzu Impulse. Part number 671-4178 is a direct-fit ignition wire replacement for these listed applications.

Quality Assurance

Denso states that First Time Fit ignition wire sets are built to OE-style form and performance expectations, with construction that meets or exceeds OE/OES standards. That makes 671-4178 a dependable replacement option for maintaining factory-style ignition system operation.