NGK APR5FS Spark Plug – Stock 3122
The NGK APR5FS is a reliable copper-core spark plug designed for clean ignition and consistent performance. It uses a projected insulator for better flame front control and includes an internal resistor to reduce electrical noise that can affect modern electronics.
This plug helps cold starts, smooth idle, and response under load. It is a solid OE-quality choice if you want dependable ignition without moving to precious-metal plugs.
- Stable spark for everyday driving and light performance use
- Resistor design reduces radio interference and ECU noise
- Projected tip improves combustion stability
| Part Number | APR5FS |
| NGK Stock Number | 3122 |
| Category | 686 – Spark Plug |
| GTIN | 087295131220 |
| Plug Type | Standard nickel alloy, copper core |
| Resistor | Yes (R) |
| Insulator | Projected (P) |
| Heat Range | 5 (NGK scale) |
| Recommended Gap | Factory set; adjust to the vehicle specification |
| Typical Use | General road use, OE replacement |
Fitment Guidance
This is a general-use NGK spark plug code. Applications vary by engine. Use the vehicle lookup on our site or check the Vehicle Fitment tab to confirm it matches your engine, thread size, reach, and heat range before ordering.
Important: Always confirm the correct thread size, reach, seat type, and gap for your specific engine. Incorrect fitment can cause misfire or engine damage. Adjust the gap only to the vehicle specification.
The price displayed is for a single plug, please add the desired amount to your basket.

