4-Pack UF540 Ignition Coil Pack and 90083 LTR5BI-13 Spark Plugs

In this review of the 4-pack UF540 ignition coil pack and 90083 LTR5BI-13 spark plugs kit, the bottom line is simple: this set is aimed at Mazda owners who need a straightforward, OE-equivalent replacement to restore ignition performance. It is especially useful for drivers experiencing misfires, long cranking, or decreased power on Mazda 3 (2006-2013), Mazda 6 (2006-2013) and CX-7 (2010-2012) with the compatible L4 engines. The reviewer found the kit offers good value, easy installation, and materials that match OE standards, making it a practical repair option rather than an upgrade for performance tuning.

Key Features

• Compatibility: Compatible with specific Mazda 3, Mazda 6 and CX-7 L4 engine model years, which simplifies part selection when OE numbers match.
• OE-Equivalent Coils: The UF540 and related OE numbers are listed so buyers can confirm a direct replacement for factory coil packs.
• OE-Equivalent Spark Plugs: Includes 90083 LTR5BI-13 spark plugs that meet the original equipment specification for fit and function.
• Durable Construction: Made from high-temperature resistant materials to withstand typical engine conditions and maintain ignition reliability.
• Complete Kit: Ships with four ignition coils, four spark plugs and a manual, providing everything needed for a four-cylinder replacement.
• Support and Warranty: Backed by a 24-month support promise from the brand for customer questions and post-sale help.

Who It's For

This kit is best for owners of Mazda 3 (2006-2013) with 2.0L, 2.3L or 2.5L four-cylinder engines, Mazda 6 (2006-2013) 2.3L/2.5L L4 variants, and CX-7 2.3L or 2.5L L4 from 2010-2012 who need a complete ignition coil and plug replacement. It suits DIY mechanics or independent shops looking for an affordable, OE-equivalent set to fix misfires, hard starts, or poor fuel economy.

Those seeking high-performance ignition upgrades or tuning parts should look elsewhere; this kit focuses on restoring original function and reliability rather than increasing power beyond factory levels.

Pros & Cons

Pros

• Direct-replacement design that matches OE numbers for straightforward fitment.
• Includes all four coils and four spark plugs so the entire bank is refreshed at once.
• Constructed from high-temperature materials, offering durability under normal engine conditions.
• Good value compared with purchasing coils and plugs separately.

Cons

• Functionality feedback is mixed for some users, so results may vary depending on vehicle condition and installation.
• Not intended as a performance upgrade; it restores stock-level performance only.

Specifications

Brand	SYKRSS
Included Parts	4 ignition coils, 4 spark plugs, 1 manual
Coil OE Numbers	UF540 and related OE numbers for Mazda replacement
Spark Plug OE	90083 LTR5BI-13
Compatible Vehicles	Mazda 3 (2006-2013), Mazda 6 (2006-2013), CX-7 (2010-2012) L4 engines
Material	High-temperature resistant materials
Warranty	24-month customer support

Our Verdict

For Mazda owners needing a full ignition coil and spark plug replacement, this 4-pack kit is a practical choice that balances cost and reliability. It restores stock ignition performance, is easy to install for competent DIYers, and is a good value when replacing all cylinders at once. Buyers seeking performance gains should consider other options, but for routine repair this kit is a smart, affordable solution.

Frequently Asked Questions

Will these coils and plugs fit my Mazda?
Confirm fitment by matching the listed OE numbers and model years for Mazda 3, Mazda 6 and CX-7 L4 engines before purchase.

Are these parts installation-friendly for DIYers?
Yes, the kit includes a manual and is intended for straightforward swap-in replacement of factory coils and plugs.

Do these improve performance?
They are OE-equivalent replacements meant to restore original engine performance and resolve misfires or rough idling rather than provide performance upgrades.