yes. unless you see smoke, it's the "outside" new car smell as opposed
to the "inside" new car smell.  It'll go away in 30 or 40 miles.

Sometimes the metal parts are coated with oil from suppliers so that they
don't rust during the process of shipping parts, making the car and shipping
the car to the dealer.  You likely smell the light oil coating that is
burning off of the exhaust manifold.  There have been similar complaints
with other Lexus vehicles, but the anti-rust oils lightly sprayed onto metal
parts prior to shipping from suppliers to Lexus assembly plants do take a
few weeks to burn away and get washed off.  It may be undercoating but is
more likely the new parts smell as mentioned in another posting.  You could
power wash everything to try clean off all the 'new car' oils oozing out of
the parts, but I don't recommend it.