e buses (No. 38) linking the ferry terminal with BSB. Or you can just take a tour van / taxi.
There is a car ferry service from Brunei to Sabah
Please note that you need to pay a tax ("cukai kepala") to get out of Brunei (currently, B$ 2 per ferry ticket). Enquire the counters/travel agent if you didn't get the tax coupon when purchasing the tickets
