X4XZ UF487 Ignition Coil & 6619 Double Iridium Spark Plug 6-Pack — Direct-Fit Replacement for Toyota/Lexus/Scion, Heat-Resistant,

X4XZ UF487 ignition coil packs paired with 6619 double iridium spark plugs replace OE 90919-02255 to restore reliable combustion and smoother engine performance across compatible Toyota, Lexus and Scion models.

This complete 6-pack kit includes six ignition coil packs (UF487) and six double iridium 6619 spark plugs designed to meet or exceed original equipment form, fit and function. Each coil is engineered with heat-resistant thermoplastic connectors and internal ferrite noise suppressors; the spark plugs use dual iridium electrodes for extended life and stable sparks. The set targets common fault symptoms like misfires, rough idle, reduced power and spotty fuel economy, giving you a straightforward replacement option for direct-fit applications.

Which vehicles does this coil-and-plug kit fit?

The X4XZ UF487 & 6619 kit fits a broad range of Toyota, Lexus and Scion models that use the UF487/90919-02255 ignition coil family and corresponding spark plug thread/spec. Compatibility covers a mix of four- and six-cylinder engines across model years—always confirm against your vehicle’s OEM part number before purchasing.

• Lexus: IS350 (2006), ES300h (2013–2018), ES350 (2007–2016), RX350 (2007–2015), RX450h (2010–2015), NX300h (2015–2019)
• Toyota: Avalon (2005–2018 variants), Highlander (2008–2016), RAV4 (2006–2018 variants), Sienna (2007–2016), Venza (2009–2015), Camry (2010–2017)
• Scion: tC (2011–2015)

How do these ignition coils and spark plugs improve engine performance?

Upgrading worn coils and plugs restores consistent high-voltage delivery and spark stability, which helps reduce misfires and uneven idle. The double iridium plugs maintain electrode geometry longer for steady combustion, while coils with ferrite noise suppression keep electrical interference down.

• Double iridium electrodes for extended lifespan and consistent spark
• Ferrite noise suppressor reduces radio frequency interference
• Thermoplastic connectors resist heat-related cracking and ensure secure fit
• Designed to match or improve OEM performance for straightforward swapping

What are the key specifications and part cross-references?

The kit’s primary reference is UF487 (OE family) and OE cross 90919-02255. It includes six coil packs and six 6619 double iridium spark plugs, intended as a one-service replacement set for six-cylinder applications and select four-cylinder models listed in the compatibility notes.

• Kit contains: Ignition Coil Packs x6 and Double Iridium Spark Plug x6
• OE references: UF487, C1601, 90919-02255 and multiple substitute numbers listed on the product label
• Spark plug life: designed for long service life (manufacturer rated for extensive kilometers under normal conditions)
• Installation: direct-fit design, no special tools beyond common automotive hand tools

What support and warranty come with this product?

X4XZ provides customer support and a limited product service period to address installation or quality concerns. If you encounter fitment issues or defects, reach out to the seller for troubleshooting and replacement options within the stated service window.

• 24-hour customer service availability for support
• 1-year product service coverage for defects and quality issues
• Basic installation guidance available from support if needed

Who is this for: The X4XZ UF487 & 6619 kit is intended for DIYers, independent mechanics and fleet managers who need a full six-cylinder ignition service replacement using direct-fit coils and long-life iridium plugs. It’s ideal when your vehicle exhibits misfires, rough idle or reduced efficiency and you prefer a complete, same-time replacement for all cylinders to ensure balanced performance. Always verify compatibility with your vehicle’s VIN or OEM part number before ordering.