NGK TR5A-10 Spark Plug
The NGK TR5A-10 is a reliable resistor spark plug designed for clean ignition and stable performance. It uses NGK’s proven copper core and nickel alloy electrodes for good heat transfer and long service life. The factory-set 1.0 mm gap supports smooth idle and dependable cold starts.
Expect consistent firing and reduced radio interference thanks to the built-in resistor. The heat range suits everyday road use while handling light performance upgrades. Ideal as a quality replacement to restore lost throttle response and fuel economy.
- Stable spark for better starting and smooth idle
- Built-in resistor to reduce electrical noise
- Durable nickel alloy electrodes with copper core
Always confirm fitment by engine code or vehicle lookup. Check the gap and torque to the vehicle maker’s spec.
| Part Number | TR5A-10 |
|---|---|
| NGK Stock Number | 5 |
| Category | 686 – Spark Plug |
| GTIN | 087295100059 |
| Type | Resistor spark plug |
| Heat Range (NGK) | 5 |
| Pre-set Gap | 1.0 mm |
| Centre Electrode | Nickel alloy, copper core |
| Ground Electrode | Single |
| Terminal | Standard fixed terminal |
Fitment Guidance
Broadly suited to many petrol engines that specify an NGK heat range 5 plug with a 1.0 mm gap. Use our vehicle lookup or see the Vehicle Fitment tab to confirm it matches your engine’s thread size, reach, seat type, and heat rating.
The price displayed is for a single plug, please add the desired amount to your basket.


