UF316 Ignition Coil Pack and Iridium Spark Plugs Set of 4 - Reliable

In this review the UF316 ignition coil pack and iridium spark plugs set is assessed as an affordable, direct-fit replacement for several Toyota and Scion 1.5L engines. The kit is aimed at owners who need a straightforward plug-and-play service part to restore reliable spark and reduce misfires. The single biggest reason to buy is the matched coil and plug pairing designed to meet OEM fitment and materials standards, which simplifies a routine tune-up and can help improve starting and steady idle behavior.

Key Features

• Direct fitment: Fits multiple 1.5L Toyota and Scion models so installers get a plug-and-play replacement without modification.
• High-quality coil construction: German-imported high-purity copper windings and silicon steel core provide stable high voltage output and resistance to oxidation.
• Durable iridium electrode: The spark plugs use a continuous laser-welded iridium center electrode for concentrated spark and longer life up to the advertised service interval.
• Improved combustion: The matched kit is intended to reduce carbon deposits and improve fuel efficiency, which can lower emissions and restore engine smoothness.
• Manufacturing standards: Produced in TS16949 certified facilities, indicating controlled production and consistent parts quality.

Who It's For

This kit is best for owners of Toyota Echo, Prius, Prius C, Yaris and Scion xA/xB with the 1.5L L4 engine who want a full ignition refresh using parts that follow OEM specifications. It suits DIYers and independent shops looking for a matched coil and spark plug set to address misfires, rough idle, or decreased fuel economy.

Those who should look elsewhere include owners of incompatible Yaris sedan variants or other dissimilar engines; always check year, model and submodel compatibility before purchasing to ensure correct fitment.

Pros & Cons

Pros

• Matched coil and iridium plugs simplify maintenance and reduce the chance of mis-matched components.
• Iridium center electrode and high alumina ceramic plug body offer longevity and stable insulation.
• Coil materials and epoxy potting are designed for corrosion resistance and consistent high voltage output.

Cons

• Fitment is specific to 1.5L models and certain trims; incorrect submodel selection can result in incompatibility.

Specifications

Brand	KacuYelin
Replacement Number	UF316 / OE 90080-19021 / 90919-02240
Compatible Engines	1.5L L4 Toyota and Scion models
Included Parts	4 ignition coils and 4 iridium spark plugs
Spark Plug Materials	Iridium center, high alumina ceramic (95% Al2O3)
Coil Construction	Copper windings, silicon steel core, high-temp epoxy

Our Verdict

The UF316 coil pack and iridium spark plug set is a sensible value purchase for owners of compatible Toyota and Scion 1.5L vehicles who need a reliable, direct-replacement ignition service kit. With OEM-matching fitment, durable coil construction and long-life iridium plugs, it restores spark reliability and can improve idle smoothness and fuel efficiency when installed correctly.

Frequently Asked Questions

Will this fit my 2007 Yaris?
This kit covers Yaris models up to 2018 for specific 1.5L hatchback versions; check your year and body style as 2016-2018 compatibility notes apply and sedan variants may be different.

Are the spark plugs pre-gapped?
The plugs are manufactured to OEM specifications but installers should verify gap and torque to vehicle service values during installation.

Can I replace only coils or only plugs?
You can replace either component, but buying the matched kit ensures compatibility and is recommended when addressing misfires or poor fuel economy.