2016 LEXUS GS

I am experiencing a persistent and potentially hazardous steering issue with my 2016 Lexus GS 350 AWD (Luxury Package). At highway speeds (typically 60 mph and above), the steering exhibits a distinct "sticky" or "notchy" sensation around the center position. Specifically, the steering wheel resists small corrective inputs when driving straight and appears to "stick" in place before releasing and allowing directional change. This results in delayed response when attempting to maintain lane position and requires greater-than-normal force to overcome the initial resistance. The condition becomes most noticeable after continuous driving at highway speeds and compromises the vehicle’s ability to respond predictably in situations requiring quick or fine steering adjustments. The issue does not trigger any warning lights or diagnostic codes, and it persists despite the installation of new tires and a professional alignment. Due to the impact this issue has on steering precision and overall

Vehicle is 2016 lexus GS350 showing clear coat failure on the roof on the edges. Door handles and black pillar cover are not both showing discoloration. The head light cover under both headlights have lost its color. A vehicle of this age should not be having paint failure like this. I contacted the lexus customer service mentioning this is a defect with the paint application and they wouldn't help.

In October 2019 my engine upon start made a knocking/rattling sound. The engine noise continued even after the car was warm. The vacuum pump was diagnosed by the dealership and it was repaired under the manufacturer's warranty. From my understanding, the failure of the vacuum pump could cause the brakes to not respond. In December 2023 the vacuum pump displayed the same knocking/rattling sounds and the dealer diagnosed the vacuum pump as requiring replacement. No warning lamps, messages or other symptoms, other than the noise.