We don't have a lot of Lexus GS 300 engine problems on file — feel free to add yours here. The most common GS 300 engine problems cost $3,700 to fix & occur at 136,000 miles. Click on a year below.

Worst Engine Problems
oil sludge resulting in engine failure 1998 Lexus GS 300
excessive oil consumption 2006 Lexus GS 300
head gasket leak 2004 Lexus GS 300