X4XZ Ignition Coil & Double-Iridium Spark Plug Kit for Toyota/Lexus V6 — 6-Pack UF267 + 4504, Direct-Fit Reliability

This X4XZ kit includes six UF267 ignition coil packs and six 4504 double-iridium spark plugs engineered to restore reliable spark, smoother idling, and improved throttle response for compatible Toyota and Lexus 3.0L–3.3L engines.

When ignition coils or spark plugs wear, engines often show misfires, rough idle, loss of power and reduced fuel efficiency. The X4XZ UF267 + 4504 kit is offered as a direct-fit aftermarket replacement for a range of Toyota and Lexus V6 models from late 1990s through the 2000s, designed to match OEM fit and provide longer life from the double-iridium electrodes and upgraded coil materials.

Which vehicles will these ignition coils and spark plugs fit?

This set is compatible with many Toyota and Lexus V6 models. Always cross-check part numbers and visually compare the coils and plugs against your vehicle before purchasing to ensure correct fitment.

• Fits: Avalon (2000–2004 3.0L), Camry (2002–2006 3.0L; 2004–2006 3.3L)
• Also for Highlander (2001–2008), Sienna (2001–2006), Solara (2004–2008)
• Lexus applications: RX300/330, ES300/330, RX400h where specified
• OE cross-references included (UF-267, 4504 and related OEM numbers) for verification

How do these parts improve engine performance and reliability?

The double-iridium spark plugs deliver a stable, long-lasting spark and resist electrode wear, while the ignition coils are built with materials and noise suppression intended to keep voltage delivery reliable. Together they reduce misfires and help the engine run smoother under load.

• Double-iridium tips for extended service life (up to long highway distances)
• Stainless-steel spring and ferrite suppressor reduce electrical interference
• Thermoplastic connectors resist heat cracking and ensure secure electrical contact
• Designed to match or improve OEM electrical characteristics for easier replacement

What should I expect during installation and maintenance?

Installation is straightforward for anyone comfortable with basic engine work: remove the engine cover, unplug the coil connectors, unbolt and replace coils and spark plugs. There is no printed manual included, so follow a vehicle-specific repair guide or service manual for torque specs and gap checks.

• Kit contains six ignition coils and six double-iridium spark plugs
• No printed instructions—use a repair manual or online guide for your model
• Torque spark plugs to manufacturer specification and use anti-seize sparingly if recommended
• Inspect wiring and connectors for corrosion before reassembly

Are these parts durable and what warranty or support is provided?

X4XZ supplies these coils and plugs with materials intended for extended service life and electrical stability. The double-iridium design and upgraded coil construction aim to prolong service intervals versus standard plugs and worn coils; customer support and a limited product service period are included.

• High-durability double-iridium electrodes for consistent spark over time
• Coil construction reduces radio-frequency interference and resists heat-related damage
• One-year product service and 24-hour customer support from X4XZ
• OE part numbers provided for compatibility checks before purchase

Who is this for: This X4XZ UF267 + 4504 kit is aimed at Toyota and Lexus owners with 3.0L–3.3L V6 engines who need a full-bank ignition refresh—DIY enthusiasts, independent mechanics, or fleet operators seeking a direct-fit, longer-life replacement for worn coils and spark plugs. If your vehicle shows misfire codes, rough idle, or decreased fuel efficiency and it matches the listed years and engines, this kit provides all six coils and plugs needed to return the ignition system to good working order.