2006 Lx 470 90,000 Mile Service Done

[Alldrums]

when should I have the timing belt checked again. They did not replace it. They did replace the water pump. It now has 116,000 miles.no issues

[1990LS400]

Is "they" a Lexus dealership and at what mileage was the water pump replaced? The timing belt is supposed to be replaced every 90K miles or nine years (whichever comes first) per the LX470 maintenance schedule. Here is a link to it: http://drivers.lexus.com/t3Portal/document/omms/06LexSCHU_MS0011/pdf/06LexSCHU_MS0011f.pdf

Timing belts rarely fail on their own but are ruined when another component fails - water pump, idler, tensioner. I had a water pump fail and take out the timing belt at about 75,000 miles from new on my first Lexus (1990 LS400). Most of the other timing belt failures I've known about have really been failures of an idler or tensioner.

We've had a bunch of Lexus and Toyota timing belts changed pretty close to the maintenance schedule although I've gone one year past the recommended number of years one time. Other than the timing belt that was trashed by the water pump failure, all the old timing belts looked like new when they were replaced at 90,000 or 180,000 miles.

At least timing belt replacement is becoming a thing of the past. Depending on model, most vehicles made by Toyota after 2006 or 2007 have a timing chain.