You'll need to take it to a dealer or mechanic with a proper diagnostic tool or use a 3rd party reset tool yourself. They plug it into a socket under the dash, read the fault code and attempt to clear it. This can be quite expensive and if you have a poor connection under the passenger seat then it may come straight back on.
I bought the B200 airbag reset tool (google or ebay search) to reset ours. I disconnected the passenger occupancy sensor (under the seat) cleaned the contacts, reconnected it then taped the connectors together with electrial tape. Did the reset with the tool and the fault never reoccurred while we had that car.
Buying the reset tool cost less than the quote from a BMW main dealer to investigate the fault YMMV.
I would like to sign your form please, ive got a 2002 mini cooper and i have the airbag warning light on, it came on when i was cleaning the car all i did was but the seat back and it came on
hi! ive been reading through a lot of posts and can see that there is a tool for resetting the air bag light for mini's up to 2004 (the B200 tool) but is there a tool for doing it on a 2006/7 cooper s? can the same tool still be used?
ive found these people but unsure weather it will work? Ive asked them but they haven't replied...
bavariandominator.co.uk/pages/MS509_OBD2_EOBD_Car_Fault_Code_Reader_117556-z=325059&p=33754.cfm]MS509[/url] OBD2 & EOBD Car Fault Code Reader
Does anyone know of a solution tool for this model of mini?
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Proud Mini Cooper Owner.
2006/7 cooper s reset tool 
