Rear electrical module may stop working on Volvo S80

Problem Description and Possible Solution
The rear electrical module stops working (REM) This affects the fuel gauge and trunk opening switch
Problem Data
RepairPal Verified
Average mileage: 136,000 (85,000–187,000)
4 model years affected: 1999, 2000, 2001, 2006
5 people reported this problem
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got in the car this morning, says my tank is empty! Was fine yesterday. put 63.00 worth of fuel 3 days ago, very little driving. Thought someone siphoned my tank! went to fuel up. only took 6$ worth. Relieved, I can live without the fuel gauge.