Performance Ignition Coils for Toyota 4Runner (1996-2002) 3.4L

High-Output Performance Ignition Coils for 1996-2002 Toyota 4Runner (5VZ-FE / N180)

Direct-fit replacement ignition coils engineered to restore spark energy and eliminate misfires caused by degraded OEM 3.4L coil packs.

The Stock 4Runner Ignition Weakness

The factory 5VZ-FE engine utilizes a wasted spark system where three coils fire all six cylinders. Over years of severe thermal cycling, the OEM epoxy insulating the internal windings degrades. This deterioration leads to micro-cracking and massive internal resistance spikes. The resulting symptoms are weak spark, rough idle, increased fuel consumption, and under-load misfires. This is especially prevalent when heat soak conditions elevate under-hood temperatures during off-road crawling or extended towing applications.

The Engineering Solution

These performance replacement coils are constructed with upgraded primary and secondary copper windings to maximize voltage output and drastically reduce cycle recovery time. The precision-wound cores are housed in a high-dielectric polymer casing sealed with heavy-duty, thermal-resistant epoxy. This effectively prevents moisture intrusion and withstands extreme engine bay temperatures. Designed as a direct bolt-on upgrade, they integrate perfectly with the factory female wiring harness and three-terminal interface, ensuring zero voltage leakage and a stable, high-intensity spark across the entire RPM range.

Technical Specifications

Compatibility

• 1996-2002 Toyota 4Runner 3.4L V6 (Front Placement)
• Interchange Part Numbers: UF156, 9091902212, C1041, E679, 178-8274, GN10184, IC223, 348L, 48983, U4016, 450002, IGC0119, 297007951, C-509, 88921337, E589, 1IC134, 50050, 36-8014, 5015, 2505-34660
• Superseded Part Numbers: 921-2009, 5C1308, IC223SB, UF156T, 673-1201, 23-0365, 52-1519

The Toyota Durability Standard

The Toyota N180 standard demands relentless reliability on the trail. Upgrading the ignition system ensures your 3.4L V6 delivers consistent low-end torque for rock crawling and dependable, uninterrupted power delivery when hauling heavy loads to remote locations.