Ignition Coil Pack and Iridium Spark Plugs Compatible with Toyota 4.0L

In this review the A-Premium set of 6 ignition coils and iridium spark plugs is evaluated for Toyota 4Runner (2003-2009) and Tundra (2005-2011) owners who need a direct replacement for the 4.0L V6 engines. The bottom line: this kit is for drivers who want a complete ignition refresh with long-life iridium plugs and plug-and-play coils that match factory mounting and electrical specs. It stands out because the components are built to the reference numbers listed for these vehicles and aim to restore engine smoothness and fuel efficiency without complex modification.

Key Features

• Direct Fit: Designed to match the factory reference numbers for easy replacement on Toyota 4Runner 2003-2009 and Tundra 2005-2011 4.0L V6 models, so installation is straightforward for most DIYers.
• Iridium Spark Plugs: Central electrodes made of iridium and nickel extend plug life and support more stable idle and quicker starting compared with conventional plugs.
• Engineered Coils: Coil packs include blade terminals, bolt-on mounting to the valve cover and primary/secondary resistance values that align with OEM ranges for consistent ignition performance.
• Measured Specs: The plugs use a 14 mm thread diameter and a 1.0-1.1 in gap specification, providing reliable spark characteristics when installed with the recommended torque.
• Warranty: A-Premium backs the kit with a one-year unlimited-mileage guarantee, offering added confidence after installation.

Who It's For

This kit is best for Toyota owners with the 4.0L V6 who need a full ignition coil and spark plug replacement and prefer components matched to the vehicle's original reference numbers. It is particularly suitable for independent mechanics and competent DIYers who want a complete set that covers all cylinders and restores consistent spark and idle behavior.

Those who should look elsewhere include drivers with non-U.S. built vehicles outside the listed model years or owners who insist on OEM-branded plugs from a specific original manufacturer; the product is an aftermarket kit built to fit the specified vehicles and not an OEM part.

Pros & Cons

Pros

• Provides a full set of coils and iridium plugs for a complete ignition service in one purchase.
• Iridium central electrodes promise longer life and improved starting and idle stability.
• Coil pack electrical and mounting specs mirror OEM-style values for straightforward replacement.

Cons

• Spark plug material and appearance are aftermarket; some buyers noted they are not OEM branded, which may affect perception of authenticity.

Specifications

Our Verdict

The A-Premium coil and iridium spark plug kit is a practical, value-oriented replacement for Toyota 4.0L V6 owners who need a full ignition service. With clear reference numbers, compatible coil specifications and long-life iridium plugs, it restores smooth running and can improve fuel efficiency; it is a sensible buy for DIY installers and independent shops seeking a matched kit backed by a one-year warranty.

Frequently Asked Questions

Will these fit my non-U.S. built 4Runner?
They are specified for vehicles built in the U.S.; owners of non-U.S. built models should verify fitment before purchasing.

Do the coils mount like the factory units?
Yes, the coils are bolt-on to the valve cover and use blade terminals consistent with the listed specifications.

Are the spark plugs iridium?
Yes, the spark plugs use an iridium central electrode with nickel, which extends service life and supports stable idle and starting.