X4XZ UF507 Ignition Coil & 4503 Double Iridium Spark Plug Kit — 4-Pack for Lexus/Toyota/Scion, Long-Life & Noise‑Suppressed

This complete four-pack replaces worn ignition coils and spark plugs with a matched set engineered for long life and stable performance. Each ignition coil is built with heat-resistant materials and an internal noise suppressor to protect electronics, while the double-iridium spark plugs deliver consistent spark energy and a longer service interval than standard plugs. The kit arrives as four coils and four plugs ready to swap into vehicles listed in the compatibility guide.

Which cars will this X4XZ coil and plug kit fit?

The kit covers a wide selection of Lexus, Toyota and Scion models across multiple years and engine types. Confirm fitment using your vehicle year, model and engine displacement before ordering to ensure direct compatibility.

• Lexus: ES300h, ES350, GS300/350/450h, IS250/300/350, LS460/600h, RX350/450h, GX460, LX570, NX300h, RC300/350, RX series (various years).
• Toyota: Camry, 4Runner, Avalon, FJ Cruiser, Highlander, Land Cruiser, RAV4, Sequoia, Sienna, Tundra, Venza (listed year ranges).
• Scion: TC models covered in the specified years. See the second product image for a more complete vehicle list.

How does replacing both coils and plugs help engine performance?

Replacing coils and plugs together restores the entire ignition path so each cylinder gets the correct spark timing and energy. That reduces misfires, stabilizes idle quality and can improve throttle response and fuel use compared with degraded ignition parts.

• Eliminates weak sparks that cause rough idling and hesitation.
• Double-iridium electrodes keep spark consistency for extended mileage.
• Coil materials and connectors resist heat cycling for dependable voltage delivery.
• Matched set minimizes diagnostic back-and-forth when troubleshooting ignition faults.

What are the key material and design advantages of this X4XZ kit?

This kit uses components chosen for durability and electrical stability. The spark plugs feature iridium on both electrodes to lengthen service life, and the coils use noise suppression and reinforced connectors to maintain signal integrity and fitment.

• Double iridium plugs for longer service intervals—consistent spark up to high mileage.
• Stainless-steel spring and ferrite noise suppressor reduce radio frequency interference.
• Thermoplastic coil connector resists heat fractures and secures the electrical path.
• OE-equivalent form factor for straightforward, bolt-in replacement.

Is installation difficult and what should I expect?

Installation is designed to be a straightforward swap for DIYers familiar with basic ignition work or for professional mechanics. No paper manual is included, but the coil-to-plug layout and OE-style connectors make fitment intuitive for the listed vehicles.

• Direct-replacement sizes match original mounting points and connectors.
• Recommended: follow factory torque specs and anti-seize or dielectric guidelines per vehicle service manual.
• No extra wiring or modifications required for compatible models.
• If you encounter fit or function issues, X4XZ offers customer support and a one-year product service plan.

Who is this for? The X4XZ UF507 + 4503 kit is intended for owners of compatible Lexus, Toyota or Scion vehicles who are experiencing ignition-related symptoms (misfires, rough idle, reduced responsiveness) or who want a preventive upgrade to longer-lasting iridium plugs and robust replacement coils. It suits DIY mechanics comfortable with basic engine bay work and professional service shops seeking a reliable OE-form ignition set.