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To replace the oxygen sensor on a 2002 Vauxhall Astra, first, ensure the engine is cool and disconnect the negative battery terminal for safety. Locate the oxygen sensor, which is typically found on the exhaust manifold or near the catalytic converter. Use a wrench or oxygen sensor socket to unscrew the old sensor, then install the new one by screwing it in securely. Finally, reconnect the battery and check for any warning lights on the dashboard after starting the engine.

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1w ago

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