I purchased a RX350 from Melbourne City Lexus 12 month ago. The
car is very good and has in all but one respect lived up to its
reputation. Prior to buying it, I noted the RX350 has won many awards
including winner best luxury 4WD 2003, 04, 05 (& 6). “The RX350 not
only won its class, it won it for the fourth year in a row, proving that a
successful formula will stand the test of time, even when it has a
couple of dozen worthy challengers snapping at its high-class heels.” 1
Almost as soon as I purchased the car I noted that the speed display
appeared to showing the car was traveling at a higher speed than it
really was. This was noticeable because people were often tailgating
me while I was driving at what the rx350 showed me to be the
prescribe speed limit while I was the in the left hand lane of the
freeways and flashing lights and tooting horns before overtaking me
on single lane roads. I often drive to destinations several hours away
and was unpleasantly surprised to take over an hour longer as soon as
I took the trip in my new Lexus RX350.
LEXUS is aware of the problem and has yet to fix it ( three years Plus) You can test your car by using a hand held GPS. Then demand your car is fixed. IS250 models in Australia have even worse errors depending on the option rims sizes.