Hello
This is my first Lexus, I've always been BMW guy but I got tired of having them break down on me every 6 months. Can y'all tell me the major point to know about my 2006 GS430. What are the known things that go wrong.

 

whats ur mileage? this car known as bulletproof beside regular maintanance. i owned mine 06GS430 for 30k miles. only replaced alternator and regular oil changes so far.

knock on wood

 

felt to stop any dash rattles
regular oil changes
timing belt and water pump @ 90k
follow the service manual for fluid service intervals
enjoy

as mentioned, the GS430 drivetrain is pretty much bulletproof and many examples of high mileage GS and LS.

 

30k and u already replace alternator..replace mine at 120k.

 

i meant, i bouth the car used around 110k, replaced around 120k at that time..

 

There are actually a few threads that talk about about preventative maintanence and some of the potential problems you might encounter. Water pumps and timing belts are always a concern, Toyota/Lexus have moved away from the noninterferance motors (if the timing belt breaks there is enough room that the vales wont be hit) to ones that... well, will need a complete rebuild.

 

yep, you picked a car that has a timing belt rather than a timing chain. Although there is that downfall, you outright purchased the legendary UZ-series engine