Perfectly maintained-62,000 miles-trunk fails to open under any method-BMW replaces latch-works for 2 days-then,same issue. At dealer now -they think it is an malfunction IBM module???

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Truck won't open/close-latch replaced-worked for 2 days-same issue only this time, when I went to try to open with key, alarm went off. Was able to close only after slamming really hard-at BMW now. Interestingly, I did, over the past few weeks, hear a humming sound from trunk when opened and engine on. BMW says electrical-probably IBM module??