Some BMW 740i owners report experiencing trunk lock issues that prevent the trunk from opening after a shock replacement. These problems may stem from faulty servo module gears, which can hinder the trunk lock from resetting properly. Additionally, owners have reported being locked out of the trunk after accidentally closing it with the battery disconnected, a common occurrence during maintenance. In cases where the trunk lid is stuck closed and the latch emits a clunking noise, it may indicate a malfunction in the latch mechanism. Some owners also find that a defective trunk actuator can lead to trunk lock complications, necessitating replacement. To troubleshoot, some suggest manually resetting the lock by positioning the latch in the closed position with a screwdriver before using the key to open it. It's also important to check if the trunk lock cylinder is in the correct position, as being in valet mode can prevent the interior trunk release button and central locking functions from working properly. Addressing these issues promptly can help resolve the trunk lock malfunction.
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