Lexus GS350 owners have reported 1 problem related to engine knocking noise (under the engine and engine cooling category). The most recently reported issues are listed below.
Lexus Gs350:
experiencing ongoing engine knocking noises during startup, idle, and stop light situations. Dealer service assured that it was normal operation, however the noises did not come until
about 9500 miles. It does not sound normal.
See
all problems of the 2009 Lexus GS350
🔎.