There are 1 owner-reported powertrain & transmission complaints for the 2002 Mercury Grand Marquisin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
THE TRANSMISSION WAS REPLACED. THE VIRBRATION/SHUDDER CONTINUES. THE GOING INTO REVERSE PROBLEM APPEARS TO BE SOLVED.*AK
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on May 4, 2026