150,000km
it is auto timed thru the cam shaft and crankshaft sensors.You cannot change it. The timing belt has timing marks when you change the belt in which you line up the crank and cams.
this is for the 01 model. it might also be the same for the 03, http://www.porkfist.com/repairs/auto/lexus-is300-taillight.html
60,000 miles , special tools required
105000 miles
Quality Lexus parts may be purchased at a Lexus used auto part dealer. You may also find Lexus parts at local auto part stores in your area as well as the dealers.
Buy a Chilton or Hayes manual at the local auto parts store.
form_title=Timing Belt Change form_header=Keep your engine running smoothly! If your timing belt needs changed, we can help you find an auto technician to get the job done. What is the year, make and model of your vehicle?=_ Has your timing belt been replaced before?= () Yes () No () Not Sure How many miles does your car have on it?=_
A timing belt on a 2004 Vectra GSI 3.2 should be changed at about 50,000 miles. The timing belts can be purchased at any auto parts store.
Believe it or not, Interstate.
Check the Auto Zone website it gives you detail infor How to do it
Buy a Chilton or Hayes manual at the local auto parts store.
Go to an auto parts house or a bookstore and buy a Haynes Manual.