Originally Posted by
First Lieutenant
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Join Date: Oct 2017
Location: Oklahoma
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Drives: F15 X5 35d
F15 X5 35d fuel filter change DIY GuideThe fuel filters in the F15 X5 35d, or any other BMW diesels, are supposed to changed every 20-30k miles per BMW maintenance, more or less these kinds of services often are neglected and never performed, its important to change these regularly to prevent potential contaminants from entering into the fuel system and damaging your fuel systems.***Disclaimer, This is a DIY enthusiast guide not a replacement for professional guide, I'm not liable for damages or death follow this guide at your own risk***So things you'll need-Mahle Fuel filter @ $38 (Mahle is BMW OEM supplier for this part)-Plies-8mm to 12mm socket's-2x 1/4in-5/8in hose clamp,-Lots of Rag and a oil catch can1) Once you safely lifted your car, i use a couple of ramps and drive my car on it, crawl under and look for something like this its right behind the metal looking stiffener plate, there will be, there will beremove them and the transmission cover will drop down...watch for sand dust and derbies.2) Once you've dropped the transmission protective cover, there will be another cover on the left of you (see green arrrow) that needs to be removed, ther will beandthat is securing the left inner cover which your fuel filter tucked under, there will be some some fidgeting to remove this cover. You do not have to remove the Left outer cover (red X)Here's the left inner cover removed3) Once's the left inner cover is removed you'll have full access to fuel filter. The Fuel filter is held by (i cant remember exactly) 10 or 12mm bolts, onces you remove the bolt the clamps can be removed out of its hinge.4) Next remove the front fuel filter clamps, if your filter hasn't been changed you'll have these special locking clamps. To remove find the end of the clamp and slide your screw driver and pry up and away from the locking tabs or if you're still confused use a big ass cutter pliers to assist in removal.hose clamp removed4c)Once hose is removed let filter hang down and drain into a oil pan.4c)Keep the hose clean place it in a zip lock bag and set aside5) Now that you have the front hose removed its time to slide out the 2 rubber mount on the filter.6) Remove the rear heater element/hose unit from the back of the filter, pull the locking slide pin up, and use a screw drive and pry apart the heater element from the filter, be careful not to damage the plastic housing.6a) Dont forget check/remove the stuck seal from the rear of the filter. Once its free from the line remove the old fuel filter and discard.7) Reinstall the new fuel filter, slide new filter into its sponge holder and use some diesel to keep the rubber gasket in place7b) Reinstall the heater element/feed line into the new filter, press it till it clicks in and slide in the locking pin between the notches on the filter housing.OPTIONAL STEP: ISTA/D Fuel filter primingNOTE: YOU MAY SKIP THIS STEP AND STILL COMPLETE EVEN IF YOU DON'T HAVE ISTA/D, FUEL SYSTEM WILL SELF PRIME IT SELF ON START UP.If you have ista/D you may perform a fuel filter priming, tho this step is not really done in a dealer but it should aid in purging the fuel filter system from air and reduce your cranking time.Note:Turning the ignition to ACC, locking and unlocking door will not turn on the fuel pump, the pump only turns on when starting the engine or DME detects fuel pressure is insufficient in the HPFPI/D1. Connect ISTA/D and perform athis will take 3-5 minsI/D2. Once scan complete got to>VEHICLE MANAGEMENT TAB>SERVICE FUNCTIONS>POWERTRAIN>Activating the suction jet pump transfer function>ABL Electronic fuel pump activationI/D3. Once you open ABL function you'll see a screen like this, DO NOT HIT CONTINUE UNTIL YOU'RE, OR YOU'LL HAVE 20 SECONDS OF DIESEL SPRAYING EVERYWHERE!!I/D3a) Now set up your drain setup appropriately so the fuel don't go everywhere, i use a hose and attach to the other end of the fuel filter and drain it into a catch can since my hose was short some craftiness is requiredI/D4) Once you're absolutely ready, hit continue and the pump will run for 20 Seconds approximate ~1L of fuel will be dispensed...After this a question will appear stating that if the fuel pump worked, select the appropriate answer to question (yes it was working) and end ABL Function and your done with ISTA/D Portion.8)Reinstall the rubber mounts on the filter9) Slide on the new hose clamp and reinstall the front hose to the filter and snug tight the hose clamp.10) Reinstall the filter mounting bracket and snug tight the 2x 12mm bolt11) If you dont have ISTA/D and didnt prime the system the engine will self prime but it will take 1-2 start cycles before engine will kick over, only reason to do ISTA/D if you're me who's OCD and don't like long cranking.12) Check for leaks before installing the covers.13) Reinstall the acoustic cover reverse order hand tight all the screws and nut and you're done for the next 30k Miles.
Attached ImagesLast edited by Mr.47; 10-30-2017 at
10:58 PM
.. Reason: Pic fixing, Grammar, info correction,ect ect