The BRP 529036085 (superseded by 529036166) is an OEM ECM / EMS Diagnostic Adapter Tool. It is used to connect diagnostic equipment directly to the Engine Control Module (ECM) of BRP vehicles—such as Sea-Doo watercraft, Ski-Doo snowmobiles, and Can-Am ATVs or Side-by-Sides—to read fault codes, update software, and perform system maintenance.