what is this valve A4 b7 2.0 tdi 140 bhp

chainbridge

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The valve in question is situated left hand side of the engine next to the air filter body, there are exhaust gasses leaking from it.
Some years ago I had to refit the alan bolts as they had fallen out and dropped onto the engine mounting, I now have noticed a small leakage from the valve and I will have to fit a new gasket so I would like the tech name of this valve to order the correct gasket.
Would be grateful if somebody could reply.
 
I would hazard a guess its the egr valve, have a look on ebay
 
I have noticed my 170 tdi is the same, black exhaust soot leaking, the bolts are upside down and torx i think by feeling the other week