BDFHYK Iridium Spark Plugs for Nissan Altima 2.5L (2007–2013) — 4-Pack, Fine Iridium Tips

If your Altima’s throttle response, idle smoothness, or starting feel diminished, fresh spark plugs can make a measurable difference. These BDFHYK plugs use fine iridium center electrodes and high-density ceramic insulators to deliver consistent sparks, improved wear resistance, and OE-level fit. They match several OEM part numbers and come from a TS16949 certified manufacturer, making them a practical, budget-conscious replacement for worn ignition components.

How will these plugs affect starting, idling and acceleration?

Iridium’s fine tip concentrates the spark, which helps ignite the air-fuel mixture more reliably across operating conditions. That manifests as crisper cold starts, steadier idle RPMs, and smoother low-to-mid acceleration compared with worn or generic plugs. Expect improved combustion stability without changing your engine tuning.

• Sharper spark focus from a fine iridium center electrode
• More dependable ignitions at low temperatures for faster starts
• Reduced misfires and steadier idle when replacing aged plugs

Are these BDFHYK plugs compatible with my vehicle?

These spark plugs are specified for Nissan Altima 2.5L inline-4 models covering 2007–2013 and list cross-reference OE numbers used by Nissan and Infiniti. Compatibility also extends to other compatible makes and model years when the OE part numbers align. Always verify fit using your car’s year, make, model and the original equipment part number before purchase.

• Direct cross-references: 9029, 22401JA01B, 22401JA07B, DILKAR6A11
• Compatible with various Nissan/Infiniti vehicles—confirm with OE number
• Works for many applications requiring a 9029-style iridium plug

How durable are these plugs and what materials are used?

BDFHYK builds these plugs to OE-like standards using extremely fine iridium for the center electrode and isostatic ceramic for the insulator. Iridium resists erosion better than standard nickel, extending service intervals, while the dense insulator improves mechanical strength and electrical isolation. The product is manufactured under TS16949 quality processes for consistent tolerances and reliability.

• Fine iridium electrodes for longer wear life and steady spark delivery
• High-density ceramic insulators for strength and insulation
• Produced in a TS16949-certified facility for quality control

What should I expect when installing these plugs?

Installation follows the same routine as other spark plugs: remove old plugs, check gap if needed, and torque to the OEM specification. These plugs arrive ready for fitment but always inspect threads and gaps before final installation. Proper torque and clean threads prevent damage and ensure consistent performance.

• Pre-gapped to common specifications but verify before fitting
• Use correct torque values to avoid thread or electrode damage
• Replace ignition coils or boots as needed for optimal system health

Who is this for: Drivers and DIY mechanics who own a Nissan Altima 2.5L (2007–2013) or those maintaining compatible Nissan/Infiniti models seeking an affordable, OE-style iridium replacement. These plugs suit anyone wanting improved ignition consistency and longer intervals between spark plug changes without modifying engine management. Confirm compatibility by checking your vehicle year and OE part number before ordering.