I did some search, but no definite answer about how often do we need to change fuel filter, my car is gs460 and only 91 gas used. I don't even think dealer recommended this service. Anyone?

 

Are you having some sort of issue with the car, or are you being told you need to have the fuel filter changed? I can't remember that being part of any service recommendation from Lexus. According to Lexus, every 30k miles you should have the listed fuel system items inspected but it does not call for replacement unless there is an issue and the fuel filter isn't even one of the items on that list. How many miles do you even have on the car?

-Joe

 

Car has 95k miles, without any symptoms. Nobody told me to replace it, but With my previous experience, I always do it as a maintenance item.

 

I believe it is part of the pump assembly and not serviceable

 

it is a little sock filter. leave it a be until you change the pump

 

My questions is if the filter is changed, would it prolong the life of the pump?

 

from my previous experience the answer to this question is yes. biggest reason for failure of a pump is most likely debris. changing filter will mitigate this but other things will too - not allowing your car to drive on E frequently and not filling up when the trucks are refilling gas station tanks (stirs up debris)