My car is closing in on 90k miles and I know I have a few things that I need to take care of. First off, should I change my drive belt prior to changing my timing belt or does it matter. I would rather not pay for a shop or the Lexus dealership to change my driving belt since reading posts it seems like a relatively easy job. Secondly, how many O-rings would I need to change while changing my timing belt? How many tensioners are there or do I need to replace while changing my timing belt? What gaskets are needed (are these O-rings or crank seals)? Lastly, would you all recommend I purchase my parts from other than from a Toyota/Lexus dealer? Will the dealer honor their work the same way if the parts are purchased from an outside shop? I know that's a lot, but thanks for responding.

We had a snow/ice storm on Sunday, so pics will be taken this weekend.

 

When you change timing belt, you have to remove drive belt, and re-install the drive belt later on. So, you can change both at the same time.

However, I don't think you can give Lexus service a new drive belt and ask them to use when they re-install the old drive belt :-)

So I would install the new drive belt before bringing it to Lexus for timing belt change. By the way, my local Lexus quoted $340 for timing belt change (just labor). Since most can't do that in one day, so I think that's reasonable.