espe

The rear door on driver side of my 2002 LS 430 does not lock with either the remote key, manually, or from inside. The other 3 doors lock but the alarm does not turn on because that door does not lock. That door's lock feels loose and won't latch when moved from lock/unlock position. This doesn't occur very often, but it is stressful that the car is not securely locked when this happens. Thank you for your recommendations?