When to replace fuel filter? - Lexus IS Forum
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post #1 of 9 (permalink) Old 03-29-2019, 04:12 PM Thread Starter
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When to replace fuel filter?

Some say it’s a lifetime filter. Have 200k on is 300, should I replace filter? Thnks
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post #2 of 9 (permalink) Old 03-29-2019, 09:12 PM
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post #3 of 9 (permalink) Old 03-30-2019, 04:58 PM
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There is no filter. But its a good idea to replace the fuel pump as they tend to fail before 200,000 miles.

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post #4 of 9 (permalink) Old 03-31-2019, 11:19 AM
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Quote:
There is no filter.
The filter is the plastic thing that surrounds the pump in the tank. I replaced mine when I replaced my pump. If the pump has failed, it's probably a good time to replace the filter.
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post #5 of 9 (permalink) Old 06-25-2019, 07:55 AM Thread Starter
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Will changing the plastic filter housing extend the functioning of the pump?
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post #6 of 9 (permalink) Old 06-25-2019, 02:46 PM
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Originally Posted by Beeeastman1 View Post
Will changing the plastic filter housing extend the functioning of the pump?
Possibly, But if you go that far. Why not replace all of it.

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post #7 of 9 (permalink) Old 07-04-2019, 03:03 PM Thread Starter
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So the consensus is to leave it? Or replace the filter as preventative maintenance?
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post #8 of 9 (permalink) Old 07-04-2019, 10:05 PM
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At that mileage, I would replace it. It’s cheap, like 30-40$, and not hard to do. I guess it could prolong the pump lifespan, by having less head pressure to overcome due to a maxxed out filter. I’d think the pre-pump strainer sock would affect pump life more than the post-pump filter. It’s more for the injectors than anything. On that note, there’s probably way more IS300’s on the road running the original fuel filter vs a replacement, so I’m sure it’s not a must-do maintenance item. But I would totally do it. Take not of all the little pieces and o rings and make sure they go back where they belong.
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post #9 of 9 (permalink) Old 07-05-2019, 10:59 AM
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My take is that if you're not getting "lean" codes that you traced to low fuel pressure, that it's probably not needed. If it's plugged, you'll know it. Either the car won't run or you'll get codes.

Maybe it improves the fuel pump life. Mine lasted 250K miles on the original filter.
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