Combined 2-in-1 replace filter also FPR.

Mine that was serviceable was from 2001. I don't know when they changed.

FPRs "main job"* is tob hide a failing fuel pump. A pump not putting out enough pressure will be hidden due to the FPR regulating the output.

* Tongue in cheek, it's collateral pain in the butt however plenty of times I've seen a weak fuel pump not caught due to FPR hiding the output dropping.

It's too bad can't easily measure psi/flow at the pump output.

I was in similar shoes i replaced the filter and FPR as a unit only after teardown did i realize that the filter tough plenty dirty probably had 200,000 miles left they are huge, and that the small o-ring was toast most likely the cause of my woes.

I never had any codes or even lean warning just very very hard starts occasionally.

Wife never hit that car hard WOT so the weak psi full throttle never caused a problem driving.

FPR/filter is a maintenance thing ay this age. I didn't see if you replaced the pump but do some math:

Odometer in miles divide by average speed in mph. That will show you estimate of hours.

If using ethanol gas you should get about 5000 hours, pure gas 4000 hours.

In mine and wife's case it was very close.

132000/27=4888.889 was one of them the other was crazy close.

Hope you find and resolve. I wished my 3.0 was three pedal would be much more responsive.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)