One problem related to software has been reported for the 2003 Lincoln LS. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Lincoln LS based on all problems reported for the 2003 LS.
Took transmission for repair. Transmission shop could not load new Lincoln software on new computer module. It has been two weeks at rowlett transmission shop and now the "engine side" of the new computer installed will not clear. Says there in an engine issue now. There was no engine issue before I took it to get the transmission fixed.