NGK Iridium Spark Plugs IFR5T11 Pack of 4 — Laser Iridium for 4‑Cylinder Engines, Long Life

NGK 4996 Laser Iridium spark plugs (IFR5T11) are a four-pack of OEM-grade iridium plugs designed to deliver consistent ignition performance and extended service life for compatible 4-cylinder engines.

These NGK iridium plugs combine a fine-wire iridium center electrode with proven NGK construction to offer dependable starts, stable combustion and long replacement intervals. They are commonly specified by manufacturers as original equipment and are produced by NGK, the world's largest OEM spark plug supplier. Before installing, confirm fitment for your vehicle's year, engine and required quantity to ensure compatibility.

Which vehicles and engines will accept NGK IFR5T11 spark plugs?

These plugs fit a wide range of compact and mid-size vehicles from the 1990s through the 2010s. Typical applications include several Toyota, Scion, Pontiac, Chevrolet, Dodge, Geo and Saturn models with 4-cylinder engines; always verify exact engine displacement and model year.

• Toyota: Corolla, Celica, Prius, 4Runner (selected years and L4 engines), Echo, Matrix, MR2, Tacoma, Yaris, MR2 Spyder, Paseo, Previa
• Scion: xB (2012–2015)
• Pontiac/Chevrolet/Geo: Vibe, Prizm, Storm (selected years)
• Dodge/Saturn: Stratus and multiple Saturn S-series/SC/SL/SW variants with 1.9–2.4L 4-cylinders

How do these iridium plugs affect everyday driving and reliability?

Iridium's high melting point lets NGK use a finer center electrode, which improves spark focus and requires less voltage to fire. The result is smoother idle, consistent starts and longer intervals between replacements compared with standard nickel plugs.

• Finer electrode for more reliable ignition under varying conditions
• Improved wear resistance extends service life
• Consistent combustion can support steadier throttle response

What should I check before buying NGK 4996 IFR5T11 plugs?

Confirm that IFR5T11 is the correct part for your vehicle by checking NGK’s online application guide or your owner's manual. Verify engine displacement, cylinder count and the number of plugs required because this listing is a pack of four.

• Cross-reference NGK part number 4996 / IFR5T11 with your vehicle
• Confirm engine type (L4) and required plug gap if specified
• Purchase the correct quantity—this listing contains four spark plugs

How do I install and care for NGK iridium spark plugs?

Install using the recommended torque and a clean spark plug socket; use a gap gauge only if your vehicle lists a nonstandard gap. Replace plugs at the interval recommended by the vehicle manufacturer, and inspect ignition components like wires or coils at the same time.

• Hand-start threads, then tighten to manufacturer torque specification
• Check ground electrode for proper gap when required by OEM
• Inspect coils/wires and replace if showing wear or damage

Who is this for? Mechanics, DIY enthusiasts and owners of compatible compact and midsize cars who want a direct-replacement OEM-quality iridium spark plug will find the NGK 4996 IFR5T11 pack a practical choice. It suits drivers seeking longer service intervals and reliable ignition from a brand widely used by vehicle manufacturers; ideal when you want a straightforward swap-in plug that meets original equipment standards.