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Hi, can anyone tell me what this part is please?:confused: ive had a little water leak & traced it back to this part, it's in the water system fitted below the radiator, on a 2.5 TDI, it is a bosch part. Whilst removing it the plastic casing broke, & on closer inspection it had broke before & been glued back together, so ive done the same fix again hoping it will be ok untill i can replace it. but i would like to know what it is & does, (guessing it's a water temp sensor?).... any help gratefully recieved.
Spencer...
 

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Hijacking the thread! I have a coolant leak through a pulley beneath the expansion tank (photo below). Any idea what is the purpose/name of this part?

Service shop quoted the price at cca 60 EUR + labour.
177106
177107
 

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Don't know the engine, but to me I'd say that was the valve to control heat to the internal radiator.
 
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