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How to Replace the Thermostat in the Opel Astra

Model: Vauxhall Astra Astra G - Years 1998-2006
Part: Thermostat

In this tutorial, you will see how to replace the thermostat in the Opel Astra, a very simple and quick operation. First, ensure that the engine is cool enough, then open the bonnet and locate the rubber manifold on the right side, next to the air filter. Next, undo the three indicated bolts using a socket spanner, remove the thermostat using pliers or a flat-head screwdriver, and insert the replacement part. Finally, reassemble everything by following the reverse procedure and top up the amount of coolant lost during the operation.

Updated on 18 August 2026 by ScegliAuto

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