NGK Laser Iridium Spark Plugs DILKAR6A11 4-Pack for Nissan Altima 2.5L (2007–2012) — Iridium Tip, Platinum Pad

NGK Laser Iridium DILKAR6A11 spark plugs are high‑durability ignition components engineered to deliver longer life and consistent spark performance for 2.5L Nissan Altima engines.

If you’re replacing worn plugs or restoring reliable ignition, these NGK laser iridium spark plugs are a factory‑grade option that balances longevity with dependable ignitability. The iridium center electrode and platinum pad on the ground electrode are designed for sustained performance in DIS ignition systems, while copper cores and advanced ceramics help manage heat and sealing for consistent operation.

How do NGK Laser Iridium plugs improve ignition compared with standard plugs?

The ultra‑fine iridium tip produces a concentrated, stable spark that requires less voltage to ignite the air/fuel mixture, which helps maintain consistent combustion across the life of the plug. The platinum pad on the ground electrode promotes even wear so gap dimensions remain stable longer than conventional designs.

• Six‑times harder iridium tip for prolonged spark integrity.
• Platinum ground pad reduces uneven electrode erosion.
• Copper core improves heat transfer away from the firing end.
• Corrugated ribs on insulator reduce flashover risk.

What are the key fitment and physical specs for this DILKAR6A11 4‑pack?

These plugs are OE‑engineered to match the Nissan Altima 2.5L (2007–2012) base engines that use a 12mm thread and a 19mm reach with a gasket seat. The manufacturer heat range is 6, and they include internal resistors to limit electrical interference with electronics.

• Thread: 12mm; reach: 19mm; seat style: gasket.
• Wrench size: 14mm; ground strap: two per plug; long thread design.
• Electrode materials: iridium tip, platinum ground pad, copper core.
• Sold as a 4‑pack—enough for a four‑cylinder engine.

Are these spark plugs durable and easy to maintain?

The combination of an iridium electrode and a platinum ground pad is selected for longevity and steady performance under typical driving conditions. Trivalent metal plating and triple seals protect against corrosion and leakage, reducing the chance of seizure and making routine removal and replacement simpler.

• Trivalent plating resists corrosion and seizing in the cylinder head.
• Triple sealing prevents combustion gas leaks around the insulator.
• Pure alumina silicate ceramic insulator for structural strength and heat transfer.

Who is this for: These NGK Laser Iridium DILKAR6A11 plugs are aimed at Nissan Altima owners or technicians seeking OEM‑style replacements that emphasize longevity, stable ignition, and reduced maintenance issues. They’re ideal if you want a direct fit for a 2007–2012 Altima 2.5L four‑cylinder, prefer components engineered to original equipment standards, and value parts that minimize electrode wear and potential ignition misfires over time.