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You can take the following steps:
Inspect the Bushing:
If you can safely do so, inspect the transfer case bushing yourself. Look for visible signs of tearing or damage. It's uncommon for bushings to be filled with fluid, but external leaks may be possible.
Refer to the Owner's Manual:
Check your vehicle's owner's manual for information regarding the transfer case and related components. This can provide insight into the design and function of the transfer case and its bushings.
Seek a Second Opinion:
If you're uncertain about the diagnosis provided by the dealership, consider seeking a second opinion from another reputable mechanic or a specialized BMW service center. They can assess the condition of the transfer case and bushing independently.
Review Service Bulletins:
Check for any relevant service bulletins or recalls related to your BMW X5 model year. These documents may contain information about known issues and recommended solutions.
Contact BMW Customer Service:
Reach out to BMW customer service for clarification on the specific design and function of the transfer case and its components. They may be able to provide additional information or guidance.
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