Vacuum valve for exhaust gas quality control for Alfa Romeo 156 and other Fiat and Alfa models equipped with JTD engines. This controller is connected to the injection computer or EGR. The controller is mounted against the bulkhead in the middle behind the engine block and equipped with a two-pole connection. Is connected to the engine block with two mini vacuum hoses.

Inscription on the unit is±
ATM
EV509
12V DC
VAC
OUT

OEM number Alfa Romeo 46524556