Is it dangerous to drive with a leaking housing?

Not immediately, but ongoing coolant loss risks overheating — repair promptly and monitor coolant level in the meantime.

Should the thermostat be replaced when replacing the housing?

It’s common practice to replace both together, since the housing needs to be opened for access anyway, and it avoids doing the job twice soon after.

Aluminium or heat-resistant plastic, depending on the engine.

Our catalog has a wide range of this part type for all popular brands and models, including VAG (VW, Audi, Škoda), Opel, Toyota, and more.

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The thermostat housing holds the thermostat in place and connects the coolant circuit between the engine and radiator.

Our catalog has a wide range of this part type for all popular brands and models, including VAG (VW, Audi, Škoda), Opel, Toyota, and more.

Requires draining the coolant before removal — always fit a new gasket or O-ring when reinstalling.

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Most often from age and heat cycling making plastic housings brittle, or from over-tightening bolts during a previous thermostat replacement.