NGK Iridium IX Spark Plug – BKR5EIX-11 (Stock No. 5464)
The NGK BKR5EIX-11 is a fine-wire iridium spark plug designed for a clean, reliable spark. It improves cold starts, throttle response, and idle quality, while resisting fouling in everyday and spirited driving. Iridium’s hard tip lasts longer than standard copper plugs, so performance stays consistent for more miles.
This plug suits many petrol engines that specify a 14 mm thread, 19 mm reach, gasket seat, heat range 5, and a 1.1 mm gap. Use the vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
- Fine-wire 0.6 mm iridium centre electrode for strong ignition and reduced misfire
- Taper-cut ground electrode for better flame spread and smoother running
- Built-in resistor to reduce electrical noise that can affect the ECU and sensors
- Projected tip aids efficient combustion and cold-start reliability
- Durable design for extended service life compared with standard plugs
| Part Number | BKR5EIX-11 |
| NGK Stock Number | 5464 |
| GTIN | 087295154649 |
| Category | 686 – Spark Plug |
| Thread Diameter | 14 mm |
| Thread Reach | 19 mm |
| Hex Size | 16 mm |
| Seat Type | Flat seat with gasket |
| Heat Range | 5 (NGK scale) |
| Resistor | Yes |
| Factory Gap | 1.1 mm |
| Centre Electrode | Iridium, 0.6 mm fine wire |
| Ground Electrode | Nickel alloy, taper-cut |
| Terminal Type | Solid terminal |
| Insulator Projection | Projected tip |
| Sealing Washer | Included |
| Recommended Tightening Torque | 25-30 Nm (with gasket, aluminium head) |
| Typical Service Life | Up to 60,000 miles (usage dependent) |
Good to know
– Re-gapping iridium plugs should be done with care to avoid damaging the fine centre tip.
– Small gains in response and economy are possible, but the main benefit is consistent performance over time.
Always confirm the correct plug type and gap for your engine before installation.
The price displayed is for a single plug, please add the desired amount to your basket.


