Description
NGK ZFR5FIX-11 Iridium IX Spark Plug
A high quality iridium spark plug for reliable ignition and long service life. Ideal as an upgrade from standard nickel plugs. Helps cold starts, smooth idle and clean combustion.
Why it matters
- Fine iridium tip needs less voltage, so the spark is strong and stable.
- Improved throttle response and smoother running, especially under load.
- Longer life than standard copper-nickel plugs.
| Part category | 686 – Spark Plug |
| Part number | ZFR5FIX-11 |
| NGK stock number | 2477 |
| GTIN | 087295124772 |
| Thread size | M14 x 1.25 |
| Reach (thread length) | 19 mm |
| Hex size | 16 mm (5/8 inch) |
| Seat type | Gasket |
| Heat range | 5 (NGK scale) |
| Resistor | Yes |
| Centre electrode | Iridium, fine tip |
| Ground electrode | Nickel alloy, tapered cut |
| Factory gap | 1.1 mm |
| Terminal type | Solid SAE |
| Typical resistance | ~5 k? |
| Recommended torque | 25-30 Nm for M14 gasket seat (check vehicle spec) |
Compatibility
Common on many Honda petrol engines that specify a 14 mm, 19 mm reach, projected resistor plug with 1.1 mm gap. Use our vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
Installation notes
– Fit only to a cold engine. Check and adjust gap if your vehicle specifies a different setting. Apply a small amount of clean engine oil to the gasket. Thread in by hand first to avoid cross-threading. Torque to the vehicle manufacturer’s spec. Do not over-tighten.
The price displayed is for a single plug, please add the desired amount to your basket.
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