X4XZ UF230 Ignition Coil & 4504 Double Iridium Spark Plug Kit — 8-Pack for Toyota/Lexus 4.7L, Direct Fit, Long-Life

The X4XZ UF230 ignition coil and 4504 double iridium spark plug kit is an eight-pack replacement set engineered to restore smooth ignition and reliable starting for 4.7L Toyota and Lexus V8 engines.

This complete kit bundles eight coil packs (UF230) with eight 4504 double iridium spark plugs to address misfires, rough idling, or decreased power on compatible Toyota and Lexus models. Each part is manufactured to meet or exceed original equipment form and fit so installation is straightforward. The iridium plugs deliver longer life and steady sparks, while the coils are built with noise suppression and durable materials to transfer voltage efficiently under heat and vibration.

Which vehicles are compatible with this coil and spark plug kit?

The kit is specified for many Toyota and Lexus V8 models with 4.3L, 4.7L and selected 5.7L engines produced in the late 1990s through 2010. Confirm fitment by checking the vehicle year and engine size prior to purchase; a second reference image typically lists additional compatible VIN ranges and model details. If your truck or SUV matches the listed families below, this kit is designed as a direct replacement.

• Toyota: 2000–2009 Tundra 4.7L, 2003–2009 4Runner 4.7L, 1998–2007 Land Cruiser 4.7L, 2001–2009 Sequoia 4.7L.
• Lexus: GS430 (2001–2007), LS430 (2001–2006), SC430 (2002–2010), GX470 (2003–2009), LX470 (1998–2007), LX570 (2008–2009).
• Cross-references: OE numbers such as 90919-02230 and similar part codes are provided for verification.

How do these ignition coils and iridium plugs improve engine behavior?

Replacing worn coils and plugs often eliminates intermittent misfires, reduces rough idle, and restores throttle responsiveness and fuel efficiency. The double iridium electrode creates a consistent, long-lasting spark, while coils with internal ferrite suppression limit electrical noise that can affect ignition timing and sensors. Together they help the engine run cleaner and more predictably.

• Double iridium plugs: extended service life and stable spark consistency up to 100,000 km.
• Coils: stainless-steel spring, ferrite noise suppressor, and thermoplastic connectors for durability.
• Result: smoother idling, crisper starts, and fewer driveability complaints related to ignition.

What should I expect during installation and maintenance?

These parts are supplied as direct-fit replacements engineered to match OE dimensions, making swap-out straightforward for anyone familiar with basic engine servicing. No paper manual is included, but standard procedures—disconnect battery, remove coil packs, swap plugs, reinstall coils—apply. Torque specifications and anti-seize or dielectric grease usage vary by vehicle; consult the factory service guide for exact values.

• Package contents: 8 ignition coil packs and 8 double iridium spark plugs.
• No instruction manual included; basic mechanical skills or a professional install recommended.
• After-install: monitor for check-engine lights, and recheck torque after initial heat cycles.

What quality and support can buyers expect from X4XZ?

X4XZ builds these components from durable materials with features intended to reduce interference and resist thermal stress, aiming for reliable on-vehicle performance. The coils include ferrite-based noise suppression and robust connectors; the plugs use iridium to extend service intervals. X4XZ offers one year of product coverage and customer support to assist with installation or warranty concerns.

• Durability: thermoplastic connectors, stainless-steel springs, and noise suppression technology.
• Longevity: iridium electrodes rated for long service life and consistent sparks.
• Support: 24-hour customer service and one-year product support from X4XZ.

Who is this for: This kit is intended for owners or technicians working on Toyota and Lexus V8 models listed above who are experiencing ignition-related issues or who want preventive replacement of coils and plugs. It suits DIY mechanics comfortable with basic engine service and shops seeking a complete set of eight coil-and-plug replacements to restore ignition performance without sourcing parts separately.