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To change the spark plugs on a Renault Scenic Expression, first, ensure the engine is cool and then disconnect the negative battery terminal. Remove the engine cover if applicable, and carefully detach the ignition coil or spark plug wires to access the plugs. Use a spark plug socket and ratchet to unscrew the old plugs, then install the new ones by hand to avoid cross-threading, and tighten them to the manufacturer’s specifications. Finally, reconnect the ignition coils or wires and the battery terminal before starting the engine.

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1mo ago

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