NGK DILKAR7C9H Spark Plug – Laser Iridium (Stock No. 91215)
The NGK DILKAR7C9H is a high-quality Laser Iridium spark plug designed for clean ignition, stable idle, and long service life. It delivers a strong spark under load, helps cold starts, and maintains performance over high mileage thanks to its precious-metal electrodes.
- Strong, consistent spark for smoother running and better throttle response
- Laser-welded iridium centre and platinum ground for long life and stable gap
- Resistor design reduces electrical noise that can affect the ECU
- Projected tip aids efficient combustion in modern petrol engines
| Part Number | DILKAR7C9H |
| NGK Stock Number | 91215 |
| Category | 686 – Spark Plug |
| GTIN | 87295912157 |
| Thread Diameter | 12 mm (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) |
| Gap | 0.9 mm (factory set) |
| Centre Electrode | Iridium alloy, fine tip |
| Ground Electrode | Platinum pad |
| Resistor | Yes |
| Tip | Projected |
| Recommended Torque | 18 – 22 Nm (M12 with gasket) |
Fitment guidance
This plug size and reach are common on many modern direct-injection petrol engines. Use the vehicle lookup on our site or check the Vehicle Fitment tab to confirm it matches your engine code and OE spec.
Important: Always install on a cold engine. Do not adjust the factory gap unless your vehicle’s service data specifies otherwise.
The price displayed is for a single plug, please add the desired amount to your basket.


