One problem related to automatic transmission control module has been reported for the 2003 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Mercury Grand Marquis based on all problems reported for the 2003 Grand Marquis.
2003 Mercury Grand Marquis customer has had the head and interior lights repaired three times and wants to be reimbursed for repairs customer has extended service plan * the problem was diagnosed as the power control module. The consumer stated the problem was mis-diagnosed three times as the problem being the lighting control module.
| Automatic Transmission problems | |
| Axle Shaft problems | |
| Differential Unit problems | |
| Axle Shaft Seal problems | |
| Automatic Transmission Control Module problems | |
| Power Train problems | |
| Transmission Noise problems | |
| Axle Assembly problems | |
| Transmission Fluid Leaking problems |