13 did the sleeve fall into the engine compartment when BMW 525 cleaned the throttle?

Something is wrong 13 When BMW 525 cleans the throttle, the sleeve falls into the engine compartment, and the sleeve will enter the movement range of the piston, which will cause serious mechanical damage. The engine compartment includes engine, air cleaner, storage battery, engine exhaust system, throttle, water tank filling box, relay box, brake booster pump, throttle cable, window cleaning fluid storage tank, brake fluid storage tank, fuse, etc.