If it's coming in thru the cabin air filter, then you have a minor problem that is resolved by clearing the rubber grommet/boot drains for the cowl. These can be seen and reached from the engine bay on the lower portion of the firewall. If you remove the access panel to the passenger kick panel and feel water above the SJB after it rains and the carpet is wet, then you most likely have the water leak associated with the TSB. HOWEVER, there is at least one other area where water will leak in from above the SJB that is related to a poor seam fitment. There was a VERY recent thread posted on this.