autoexact Ignition Coil & Iridium Spark Plug Kit — 12‑Piece for Nissan/INFINITI 3.5L, Direct Replacement, Pre-Gapped

autoexact 12-piece ignition coil and iridium spark plug kit is a direct-replacement set engineered to restore ignition performance for Nissan and INFINITI 3.5L engines, supplying six epoxy-potted coils and six pre-gapped iridium plugs for a plug-and-play installation.

If your Murano, Pathfinder, Maxima, Altima, 350Z or compatible INFINITI is showing rough idle, misfire codes, or reduced throttle response, worn coils and plugs are often the culprit. This kit matches OEM fitment (UF807/97390 cross-references included), offering durable coils with strong voltage output and fine-wire iridium plugs pre-gapped for immediate installation. The set is tailored to a wide range of Nissan and INFINITI 3.5L models from 2007–2024 and includes factory-prepared lubricant to simplify the DIY swap.

How will replacing both coils and plugs affect daily drivability?

Replacing the ignition coils and spark plugs together helps re-establish consistent combustion across all cylinders, which reduces misfires and smooths acceleration. You should notice steadier idle, quicker throttle response, and fewer ignition-related diagnostic codes after installation.

• Restores even spark delivery across 6 cylinders
• Reduces shaking and rough idle
• Helps clear P0300–P0308 misfire codes
• Improves responsiveness during acceleration

Are these components easy to install for a DIYer?

The kit is engineered as a direct OE-style replacement—no modifications required—so a homeowner with basic hand tools can complete the job. Plugs arrive pre-gapped and coils are factory-sealed with epoxy, plus the package includes factory pre-lubricated components for straightforward reassembly.

• Plug-and-play design for exact fitment
• Pre-gapped iridium plugs for immediate use
• Recommended torque: 11.06–14.75 ft·lb (15–20 N·m)
• Simple swap procedure reduces shop labor costs

What performance and longevity benefits do iridium plugs and epoxy coils provide?

Fine-wire iridium electrodes offer a smaller, more focused spark that improves ignition reliability and extends service life under normal driving conditions. Epoxy-potted coils resist heat and moisture, maintaining stable output and insulating critical components from failure modes that shorten coil life.

• Iridium plugs: long service life and sharper sparks
• Epoxy-potted coils: superior heat and moisture resistance
• Tested voltage output and sealing performance
• Backed by a 2-year warranty and lifetime technical support

Which vehicles and part numbers are compatible with this kit?

This 12-piece set fits many Nissan and INFINITI 3.5L applications—verify year, make, model, and engine before ordering. It replaces common OE numbers and aftermarket references listed to help ensure correct selection.

• Fits Nissan: Murano (2009–2024), Pathfinder (2013–2024), Maxima, Altima (2007–2018), 350Z (2007–2009), Quest, and others
• Fits INFINITI: QX60, JX35, G35, EX35, FX35, Q50, Q70, M35/M35h models
• OE & replacement numbers: UF550, C1670, 22448JA10A/C, 22448JN10A/C, 93501, ILKAR7L11, and more
• Confirm fitment by year/motor before purchase

Who is this for? This kit is aimed at DIY owners, independent mechanics, and fleet technicians who want an OEM-oriented, cost-effective replacement for worn ignition components on Nissan and INFINITI 3.5L engines. If you’re diagnosing misfires, rough idling, poor throttle response, or planning preventive maintenance, this 12-piece autoexact set delivers a straightforward upgrade with tested coils, long-life iridium plugs, and support from the manufacturer.