One problem related to engine knocking noise has been reported for the 2009 Lexus GS350. 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.
| Engine Knocking Noise problems | |
| Engine And Engine Cooling problems |