I recently acquired a low mileage 2003 Range Rover HSE with several issues that I've resolved, or trying to resolve, including SRS indicator lamp on. The OBD readout indicates the following faults:
...

• Code 96 * Driver Buckle Switch
• Code 2 * Driver Buckle Pretensioner
• Code 97 * Passenger Buckle Switch. Unit
• Code 3 * Passenger Buckle Pretensioner
• Code 112 * Seat Occupancy Sensor

I replaced both buckle/pretensioner units as well as the occupancy sensor module (not the sensor mat), but all of this didn't clear the SRS-related codes! In hindsight, it seems highly unlikely that all these components are bad, implicating the airbag DCU, no?

I'm hesitant to replace the DCU myself so I plan to have it done by a qualified shop. Is it a safe bet to skip paying the shop to do any further diagnostics and just have them replace the DCU? Or is there something else that could trigger all those particular codes at once?
That being said, I would love to find a video that shows how to access the DCU buried deep in the center console. At least, I could check/clean the connections.