Gurrent mileage is 88140. I have been told by my local dealership that it is way beyond time for me to have replaced both of these and that should the timing belt break it could do serious damage because it is metal which to me makes it a timing chain and not belt? Regardless,I wanted to ask the for…

What year model is your Sienna ?

Second opinion is the key word here.

Need to know the year and engine. Some used timing belts and some used timing chains.

If your Sienna is older, it probably has the 1MZ-FE V6 or 3MZ-FE V6, both of which use a timing belt The 1MZ-FE is non-interference, according to my source The 3MZ-FE is interference, according to my source

My 2005 has the interference engine, the owners manual specifies to replace the belt at 90,000 miles or 9 years whichever occurs first. I replaced mine at 9 years with 70, 000. it still appeared in very good condition (which may be deceiving), I did not replace the water pump or cam seals. I’ve hear…

To the best of my knowledge my 2006 Sienna with a 3.3 V6 was the last year with a timing belt. The change interval is 7 yr/90k miles whichever comes first. I paid 1k for timing belt, water pump, and tensioner replacement. It would have been 200 more to replace the cam seals. The 3.5 V6 in the 20…

Sorry for the important information. My vehicle is a 2004 model with a 3.3 L V6.

You have a timing belt. Replacement interval is 90,000 miles or 7 years, whichever comes first. If you still have your owner’s manual or maintenance manual, this information should be included. You have eclipsed the mileage requirement on the timing belt, and should get it done ASAP. Next week i…

@wpollock Thanks for the information You have the 3MZ-FE engine . . . definitely an interference engine You are overdue Here is what I recommend replacing, all at the same time timing belt tensioner idler cam seals front crankshaft seals water pump Bottom line . . . you want EVERYTHING un…

Toyota Sienna XLE Water Pump and Timing Belt

Maintenance/Repairs

George_San_Jose1 November 16, 2015, 6:36am 19

108/12 == 9 years, you are absolutely right about that. The experts here are providing a commonly expressed rule of thumb for timing belt life expectancy (in time) of 6-7 years. I doubt anybody looked up the manufacturer’s recommendation intervals for the OP’s make/model/year. When in doubt, if you go by what the owners manual says and use OEM parts, that should be good.

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Toyota Sienna XLE Water Pump and Timing Belt

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