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The Green Spark Plug Company£14.04Visit shop Ngk Ilnfr9b7g 94956 Spark Plug Iridium New Ngk-Ilnfr9b7g
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The NGK Spark Plug (94956) is designed for automotive enthusiasts and DIY mechanics who own specific Vauxhall and Opel Astra K models and are looking to maintain or restore engine ignition efficiency. This iridium-tipped component provides superior spark reliability and combustion performance, ensuring smoother idle and consistent acceleration. The primary caveat is that this plug has specific thread and seat dimensions, making it essential to verify exact vehicle compatibility before installation to avoid engine damage.
| Model Part Number | 94956 |
|---|---|
| Brand | NGK |
No. This plug is specifically designed for certain Astra K models. Always check your VIN or engine code against the MPN 94956 before purchase.
NGK iridium plugs typically come pre-gapped. Avoid adjusting the gap, as the iridium tip is fragile and easily damaged.
This indicates the built-in ceramic resistor, which suppresses electromagnetic noise that could otherwise interfere with radio reception or engine sensors.
Follow your vehicle manufacturer's maintenance schedule. Generally, iridium plugs provide a longer service interval than standard plugs.
Yes, using a torque wrench is highly recommended to ensure the plug is seated securely without damaging the cylinder head threads.
Verify the ignition coil is seated fully and the electrical connector is clicked into place.
Check that the plug was torqued correctly; a loose plug can cause a loss of compression.
Remove immediately and clean the threads in the head to prevent cross-threading; never force the plug.
Installation of the NGK 94956 must be performed on a cold engine to prevent stripping of the threads in the cylinder head. Always use a spark plug socket with a 14 mm interface. When installing, tighten to the manufacturer's specified torque rating; avoid overtightening as the taper seat does not use a crush washer. Verify that the thread size (M12 x 1.25) and reach (24.8 mm) match your vehicle's service manual exactly. Do not attempt to file or regap the iridium electrode, as this can damage the thin precious metal tip. Check your plug tips every 15,000 to 20,000 miles during routine service to monitor engine health.
