NGK DILZKAR6A11 Laser Iridium Spark Plug (Stock No. 91691)
This NGK Laser Iridium plug delivers a strong, stable spark for clean combustion and reliable performance. It helps cold starts, smooth idle, and consistent power, while resisting wear for a long service life. It is built to OE standards, so it works well in standard and lightly tuned petrol engines.
- Fine-wire iridium tip for efficient ignition and quick starts
- Platinum pad on the ground electrode for long life and stable gap
- Resistor design to reduce electrical noise that can affect the ECU
| Part Category | 686 – Spark Plug |
| Part Number | DILZKAR6A11 |
| NGK Stock Number | 91691 |
| GTIN | 87295916919 |
| Series / Type | Laser Iridium (fine-wire iridium centre, platinum ground pad) |
| Heat Range (NGK) | 6 |
| Thread Diameter | 12 mm |
| Thread Pitch | 1.25 |
| Reach (thread length) | 26.5 mm |
| Hex Size | 14 mm |
| Seat Type | Flat seat with gasket |
| Spark Gap | 1.1 mm (factory set) |
| Resistor | Yes |
| Terminal | Solid |
| Electrode Projection | Projected tip |
Fitment Guidance
Designed for modern petrol engines that specify a 12 mm, long-reach, gasket-seat iridium plug with a 1.1 mm gap and NGK heat range 6. Use the vehicle lookup on our site or check the Vehicle Fitment tab to confirm exact applications.
Installation Notes
– Install only into a cool engine. Hand-thread first to avoid cross-threading.
– Tighten to the vehicle maker’s torque spec.
– Do not forcefully re-gap fine-wire iridium plugs.
– Replace as a full set for best results.
The price displayed is for a single plug, please add the desired amount to your basket.


