Thats a good question hanofee,I,d be inclined to make a few enquiries regarding that because if that belt breaks and those pistons do smack the ars* of those valves (leave the rest up to your imagination).One thing I do know is that when my brother replaced the timing belt on his RAV4 it wasnt much more to get the whole kit which like you said contains a new waterpump.155kms thats almost 100,000 miles in the old money,for peace of mind put a new pump and belt on, as its sure to let you down at the worst possible time That's what other information said, that only interference engine will cause the pistons to hit the valves in case of timing belt broken. If it's not interference, it will just stop working without doing any damage (that's more or less how I understood from google :)))... it's not that I don't want to replace it, but I'm wondering if I can wait another month or 2, when I have more time to bring it to my mechanics. I don't use this car that much, just to go to the station daily (about 1.5 km roundtrip).