NGK LFR5E-11 Spark Plug (Stock No. 1669)
The NGK LFR5E-11 is a reliable, OE-style spark plug for smooth combustion and consistent starting. It uses a copper core and nickel alloy electrode to carry heat away from the tip, helping to prevent fouling and misfire in daily driving.
It is pre-gapped to 1.1 mm. Always check and adjust to your vehicle’s specification.
- Stable ignition for easier starts and smoother idle
- Resistor design reduces electrical interference with the ECU and sensors
- Durable nickel electrode for long service life under normal road use
| Specification | Detail |
|---|---|
| Part Category | 686 – Spark Plug |
| Part Number | LFR5E-11 |
| NGK Stock Number | 1669 |
| GTIN | 087295116692 |
| Thread Diameter | 14 mm |
| Thread Reach | 19 mm (3/4 in) |
| Hex Size | 16 mm (5/8 in) |
| Seat Type | Gasket |
| Heat Range | 5 (NGK scale) |
| Tip Design | Standard projected |
| Centre Electrode | Copper core with nickel alloy |
| Ground Electrode | Nickel alloy, U-groove style |
| Resistor | Yes (approx. 5 k?) |
| Factory Gap | 1.1 mm |
| Terminal Type | Solid terminal nut |
| Fuel Type | Petrol |
Fitment Guidance
Designed for engines that require a 14 mm thread, 19 mm reach, 16 mm hex, gasket seat, and NGK heat range 5. Use the vehicle lookup on Progressive Parts or check the Vehicle Fitment tab to confirm this exact plug for your engine.
Note: Replace plugs as a full set. Install into a cool engine, apply a small amount of appropriate anti-seize only if the manufacturer advises, and tighten to the specified torque or angle for your engine.
The price displayed is for a single plug, please add the desired amount to your basket.


