UF651 Ignition Coil & Double Iridium Spark Plug 9723 Compatible

In this review the UF651 Ignition Coil & Double Iridium Spark Plug 9723 compatible kit is assessed for drivers who need a straightforward replacement for Hyundai and Kia 1.8L and 2.0L engines. The review's bottom line: this kit is for owners who want a like-for-like ignition solution built to OE form and fit, offering improved cold starts and potential fuel economy gains. The set includes four ignition coil packs and four double iridium spark plugs, and the single biggest reason to buy is its clear focus on compatibility and long-life spark plugs that aim to reduce misfires and rough idle.

Key Features

• Direct compatibility: The kit is designed to fit a wide range of Hyundai and Kia 1.8L and 2.0L models, reducing guesswork at purchase.
• Double iridium spark plugs: The spark plugs use double iridium electrodes for longer life and consistent spark delivery, claimed to last up to 100000 kilometers.
• OE-style ignition coils: Coils match or improve on OE design with advanced thermoplastic connector and stainless-steel spring for reliable high-voltage transfer.
• Reduced radio interference: Internal ferrite noise suppressor in the coil helps prevent radiofrequency interference during operation.
• Complete pack: Includes four ignition coil packs and four spark plugs, providing a full-bank replacement for many common engines.
• After-sales support: The seller offers 24-hour customer service and a one year product service period for installation or quality questions.

Who It's For

This kit is best for Hyundai and Kia owners with 1.8L and 2.0L L4 engines who need a full bank replacement of ignition coils and spark plugs and prefer parts that align closely with OE part numbers such as UF651 and NGK 9723. It also suits DIYers who want relatively quick installation and the potential for smoother idle and better fuel economy.

It is less appropriate for vehicles outside the listed model years or for owners who require factory-branded original equipment; shoppers should confirm their vehicle connector type (2-pin or 4-pin in some 2017-2018 models) by checking the product images and part numbers before ordering.

Pros & Cons

Pros

• Good fit and build quality that many customers described as easy to install and matching OE fit.
• Double iridium plugs provide longer service life and consistent spark for improved cold-start performance.
• Complete kit of four coils and four spark plugs gives a convenient one-purchase repair solution.
• After-sales support and one year product service provide extra peace of mind.

Cons

• Mixed feedback on long-term durability of some spark plugs means some buyers may prefer OEM-branded plugs.
• Compatibility requires careful checking of connector pin count for certain 2017-2018 vehicles.

Specifications

Our Verdict

The UF651 ignition coil and double iridium spark plug kit is a practical, value-minded replacement for owners of Hyundai and Kia 1.8L and 2.0L models who need a full-bank ignition refresh. It delivers reliable fit, potential fuel efficiency improvements, and long-life plugs while including basic support from the seller, making it a sensible choice for DIY maintenance and routine repair work.

Frequently Asked Questions

Will this kit fit my 2016 Elantra?
Check the compatibility list and engine size; the kit covers 2014-2016 Elantra SE and other Elantra variants with 1.8L engines.

Are the spark plugs OEM-grade?
The plugs are double iridium and reference NGK 9723 among other cross numbers; they are designed for long life but some customers report mixed durability impressions compared to OEM.

Does the kit include installation instructions?
The package does not include an instruction manual, but customers noted the parts are generally easy to install for those with basic mechanical experience.