⚡Spark Plug Type
Infiniti FX45 Spark Plug Type
Find the correct spark plug type, gap size, and replacement interval for your Infiniti FX45. Covers all model years with torque specs.
Quick Answer
The Infiniti FX45 typically uses iridium or platinum spark plugs. Newer models (2010+) use long-life iridium plugs rated for 60,000-100,000 miles. Check below for your specific year.
2003-2008
2003-2008Spark Plug TypePlatinum or Iridium
Plug Gap0.039" - 0.044" (1.0 - 1.1mm)
Replacement Interval30,000 - 60,000 miles
Torque Spec13 - 20 ft-lbs
Quantity4 (inline-4) or 6 (V6)
Notes
- →Use a torque wrench — over-tightened plugs can strip aluminum heads
- →Apply a thin coat of anti-seize to threads (unless plug is pre-coated)
- →Use a spark plug socket with rubber insert to avoid cracking the ceramic insulator
Frequently Asked Questions
- What spark plugs does a Infiniti FX45 use?
- The Infiniti FX45 spark plug type varies by year and engine. Newer models (2010+) typically use iridium plugs for longer service life. Older models may use platinum or copper. Check the specs below for your exact year.
- How often should I change spark plugs on a Infiniti FX45?
- Modern Infiniti FX45 models with iridium plugs can go 60,000-100,000 miles between changes. Older models with copper plugs need replacement every 30,000 miles. Replace sooner if you notice misfires, rough idle, or poor fuel economy.
- What is the spark plug gap for a Infiniti FX45?
- Most Infiniti FX45 models use a spark plug gap between 0.039" and 0.044" (1.0-1.1mm). Pre-gapped plugs from the OEM are recommended. Do not re-gap iridium-tip plugs as it can damage the electrode.
- Can I upgrade to iridium spark plugs in my Infiniti FX45?
- Yes, upgrading from copper or platinum to iridium is generally safe and beneficial. Iridium plugs offer better ignitability, longer life, and improved fuel economy. Just match the correct heat range and gap for your engine.
Infiniti FX45 Repair Guides
More Infiniti FX45 Guides
Browse all Spark Plug Type pages →🔋Infiniti FX45 Battery Location❄️Infiniti FX45 Coolant Type🧪Infiniti FX45 Fluid Capacities💡Infiniti FX45 Headlight Bulb Size🛢️Infiniti FX45 Oil Type & Capacity⚙️Infiniti FX45 Serpentine Belt⚡Toyota 4Runner Spark Plug Type⚡Toyota Avalon Spark Plug Type⚡Toyota Camry Spark Plug Type⚡Toyota Celica Spark Plug Type⚡Toyota Corolla Spark Plug Type⚡Toyota Echo Spark Plug Type⚡Toyota Highlander Spark Plug Type⚡Toyota Land Cruiser Spark Plug Type⚡Toyota Matrix Spark Plug Type