I have a 2001 IS 300 with 47,000 miles. I looked thru all the forums here and cannot seem to find a consistent answer on whether the engine is an interference or non-interference engine. I asked my dealer a few years back and I was told that it's a non-interference engine and in reading the posts on my.IS, it's about a 50/50 split in replies. I have not yet replaced my timing belt (service rec of 90K miles or 72 mos.), and I plan to run it till about 60,000 miles before the change, if the engine is non-interference. So the question is INTERFERENCE or NON-INTERFERENCE?