Ignition Coil Pack UF540 and Iridium Spark Plugs 90083 - Mazda Fit

In this review of the ignition coil pack UF540 paired with iridium spark plugs 90083, the reviewer focuses on drivers who maintain mid-2000s Mazda 3, Mazda 6 and CX-7 models. The bottom line: this set is best for DIY owners seeking a budget-friendly replacement that aims to restore starting performance and throttle response. Installation is straightforward for anyone comfortable with basic engine work, and the combination of silicon steel coils and iridium electrodes promises longer life than standard parts, although fit and consistency can vary from unit to unit.

Key Features

• Direct fit compatibility: Designed to match Mazda 2007-2013 3, 2006-2013 6 and 2010-2012 CX-7 2.0L, 2.3L and 2.5L L4 engines, which simplifies selection for those models.
• Coil construction: Coils use silicon steel cores, Japan-imported rubber and Germany-imported varnished wire to improve durability and resist heat degradation under normal driving conditions.
• Iridium spark plugs: The 90083 iridium tips and a specialized ceramic body aim to deliver quicker starts and more stable combustion compared with worn stock plugs.
• Complete set of four: Supplied as sets of 4 coils and 4 plugs so users can replace all cylinders at once for consistent performance and fewer repeat visits to a repair bay.
• After-sales support: Lifetime after sales service is offered by the manufacturer, which helps address fitment or quality questions after purchase.

Who It's For

This kit is suited to do-it-yourself owners and independent mechanics who work on compatible Mazda 3, Mazda 6 and CX-7 models and want an affordable full set replacement to restore spark performance and drivability. It is also a good choice for vehicles over 80,000 km showing symptoms like rough idle, slow acceleration or increased fuel use where ignition parts are a likely cause.

Those who need guaranteed factory OE brand parity or who are servicing high-performance or modified engines should look elsewhere; some buyers report mixed fitment and intermittent misfiring on a small number of units, so dealerships or OEM parts may be a safer route for precise OEM exactness.

Pros & Cons

Pros

• Good value for money when replacing all coils and plugs together, reducing repeat labor costs.
• Durable materials in the coil design aim to provide longer life than generic coils.
• Iridium plugs help faster starts and steadier acceleration compared with worn plugs.

Cons

• Fitment is mixed by some customers; a careful OE parts check is necessary before installation.
• Some reports of a single-cylinder misfire or plugs fitting too small indicate occasional quality variance.

Specifications

Compatible vehicles	Mazda 3 (2007-2013), Mazda 6 (2006-2013), CX-7 (2010-2012)
Engine sizes	2.0L, 2.3L, 2.5L L4
Ignition coil model	UF540 / UF-540 (OEM equivalents listed)
Spark plug model	90083 iridium (OE 90083 LTR5BI-13 equivalent)
Quantity	Sets of 4 coils and 4 spark plugs
Materials	Silicon steel core, Japan rubber, Germany varnished wire, iridium electrode

Our Verdict

For owners of compatible Mazda 3, Mazda 6 and CX-7 models who want an economical, full-set ignition refresh, this coil and iridium plug kit is a sensible value buy because it replaces all wear items at once and uses higher-grade materials. Confirm OE numbers and inspect fit after installation, as occasional fitment inconsistency means it is best for DIYers comfortable verifying parts and troubleshooting if a single cylinder issue appears.

Frequently Asked Questions

Will this kit fit my Mazda?
Check the detailed OE numbers and vehicle years listed for Mazda 3 (2007-2013), Mazda 6 (2006-2013) and CX-7 (2010-2012) and compare with your engine code before purchasing.

Are the spark plugs iridium?
Yes, the included 90083 plugs use iridium electrodes designed for improved starting and combustion stability.

What if a coil or plug fails?
The manufacturer offers lifetime after sales service; contact them for troubleshooting, replacement guidance or warranty support.