NGK ILKAR7B11 Laser Iridium Spark Plug – Stock No. 4912
This NGK Laser Iridium spark plug delivers a strong, clean spark with long service life. The fine iridium tip needs less voltage to fire, which helps cold starts, smooth idle, and stable performance. It resists wear and fouling, so it keeps working well over high mileage.
It is a direct replacement where ILKAR7B11 is specified. It suits many modern petrol engines that use an M12 long-reach plug. Use the vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
- Fine iridium centre for reliable ignition and crisp throttle response
- Platinum pad on the ground electrode for long life and consistent gap
- Built-in resistor for clean radio signal and ECU-friendly operation
- Strong anti-fouling and knock resistance under daily and spirited driving
| Part number | ILKAR7B11 |
| NGK stock number | 4912 |
| Category | 686 – Spark Plug |
| GTIN | 087295149126 |
| Series | Laser Iridium |
| Thread diameter | M12 x 1.25 |
| Reach (thread length) | 26.5 mm |
| Hex size | 14 mm |
| Seat type | Flat seat with gasket |
| Heat range | 7 (NGK scale) |
| Factory gap | 1.1 mm |
| Centre electrode | Fine-wire iridium (laser welded) |
| Ground electrode | Nickel with platinum pad |
| Resistor | Yes |
| Terminal | Solid SAE |
| Recommended torque | 18-22 Nm (M12 gasket seat, aluminium head) |
Fitment guidance
Common in many modern Toyota and Lexus petrol engines that specify an M12 long-reach, 1.1 mm gap plug. Always match the exact part number to your engine. Use the site’s vehicle lookup to confirm, or see the Vehicle Fitment tab.
Installation notes
Do not force-gap fine-wire iridium plugs. Set only if the vehicle maker requires it. Fit to a cool engine, use a new gasket, and tighten to the specified torque. Replace all plugs in a set for best results.
The price displayed is for a single plug, please add the desired amount to your basket.


