One problem related to transmission not engage has been reported for the 2003 Acura TL. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Acura TL based on all problems reported for the 2003 TL.
Complete transmission failure resulting in disengagement of drive train. Acura help line requested VIN number for car, so I exited vehicle to get the number from the window. Car was in park, however car rolled backwards down hill into path of oncoming vehicle. I was able to run after it and jump in to apply brake just before collision would have occurred. This is similar to the issue under pe02081. Acura is replacing the transmission, and claim that this issue as highlighted in pe02081 has been resolved and that my vehicle is not covered in the extended warranty program. My concern is that Acura know about this potential problem, they have not contacted any owner to alert them of a problem, there is no indication such as engine warning light on the vehicle to indicate transmission overheating they are waiting to get some one killed. . . Thank heavens it wasn't me.