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Land Rover Discovery 4 3.0 supercharged V6 petrol: spark plugs

Ignition · Discovery 4 (2009–16) · 2013–2016

How often: every 100,000 mi or 7 yrs, whichever comes first. Worn plugs cause misfires that can damage the catalytic converters.

Check the plug interval on your Maintenance Check Sheet; Land Rover's varies by engine.

Work safely: support the vehicle on axle stands, never a jack alone; let it cool first. Check figures against your workshop manual. You do this work at your own risk.

Parts

• Spark plugs (long-life plugs to suit engine (one per cylinder)) LR050998

Tools

• Plug socket
• Torque wrench
• Trim tools for coil covers

Step by step

1. Remove the engine covers and the coils one at a time.
2. Blow dirt out of the plug wells before removing each plug.
3. Fit the new plugs to the specified torque; don't use anti-seize unless your manual says so.
4. Refit the coils firmly and clear any misfire codes.

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