I bought my RX350 last August. In warm weather it starts and sounds fine. When the temp falls below 40 degrees the starter sounds like a 69 Dodge Dart. I swear to God it makes my 2001 F250 Superduty diesel pick up sound nearly silent!!!!!!!!!!!!! Dealer says this is normal. I say dealer service managers are either hard of hearing or covering up an issue hoping owners will forget it until warrenty is up.
I guess I forgot to mention that my NEW RX350 (had 6 miles on odometer when bought) did not make it thru the very first weekend before it was returned to the dealer for a week while the entire power steering system was replaced.
For a $40,000 + vehicle.... NOT IMPRESSED!! Will not recomend!! Vehicle now has almost 10,000 miles and if dealer does not repair with satisfaction I will persue lemon laws. I will not purchase another lexus.
Good luck with yours