NGK BKR5EKU Spark Plug (Stock No. 3964) – Dual Ground Electrode, Nickel
The NGK BKR5EKU is a robust, resistor-type spark plug with two ground electrodes. It offers stable ignition, long service life, and consistent performance in everyday driving. The dual-electrode design spreads wear and keeps the spark reliable over time.
This plug suits many everyday petrol engines that were designed for dual-electrode plugs. Typical examples include a wide range of older VW Group petrol engines from the 1990s to early 2000s. Use the vehicle lookup to confirm fitment, or check the Vehicle Fitment tab.
- Dual ground electrodes for steady spark and longer service life
- Nickel alloy with copper core for good heat transfer
- Resistor design to reduce electrical noise
| Part number | BKR5EKU |
| NGK stock number | 3964 |
| GTIN | 087295139646 |
| Category | 686 – Spark Plug |
| Thread diameter | 14 mm |
| Thread pitch | 1.25 |
| Thread reach | 19 mm |
| Hex size | 16 mm (5/8 in) |
| Seat type | Flat seat with gasket |
| Heat range | 5 (NGK scale) |
| Resistor | Yes |
| Centre electrode | Nickel alloy, copper core |
| Ground electrodes | 2 (dual) |
| Groove design | U-groove for improved ignitability |
| Factory gap | 0.8 mm (check and adjust to vehicle spec) |
| Terminal type | Solid terminal |
| Recommended tightening torque | 18-25 Nm (14 mm thread in aluminium head) |
| Typical applications | Many VW, Audi, SEAT, Skoda petrol engines designed for dual-electrode plugs |
Important: Always check your vehicle’s service information for the correct heat range and gap. Do not force-fit or overtighten. Use the site’s vehicle lookup to confirm fitment.
The price displayed is for a single plug, please add the desired amount to your basket.


