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Diesel Engine Fuel Filter Replacement
 
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Pelican Technical Article:

Diesel Engine Fuel Filter Replacement

Nick Czerula

Time:

2 hours2 hrs

Tab:

$100

Talent:

****

Tools:

Set of sockets (10mm), T20 Torx driver, drain pan, advanced scan tool, clamp pliers, floor jack, jack stands, wheel chocks, safety glasses, torque wrench

Applicable Models:

BMW 335d Sedan (2009-11)

Parts Required:

Fuel filter, fuel heater, hose clamps

Hot Tip:

Work with a cool engine

Performance Gain:

Car will run well

Complementary Modification:

Replace fuel heater

BMW introduced the M57D30T2 diesel engine in the 2009 model year of the BMW E90s. It is a BMW Advanced Diesel and part of BMW's EfficientDynamics engine development program. EfficientDynamics is not solely an instrument for reducing fuel consumption, but rather it is said to be designed as an "intelligent entity with increased dynamics".

The diesel fuel system varies slightly from the gasoline powered E90 engines. The significant differences are:

The system includes a fuel return line

The breather system is significantly simpler

There is no carbon canister (AKF) and no fuel tank leakage diagnosis module (DMTL)

There is no pressure regulator

The job of the fuel filter is to protect the fuel system against dirt contamination. The high-pressure pump and injectors in particular are very sensitive and can be damaged by even the tiniest amounts of dirt. The fuel delivered to the engine is always fed through the fuel filter. Contaminants in the petrol are trapped by a paper like material within the fuel filter. The fuel filter should be serviced every third oil change, as stated by BMW.

The fuel filter heater is attached to the fuel filter and secured with a locking clip. Fuel flows through the fuel filter heater into the fuel filter. Since winter-grade diesel fuel remains thin even at low temperatures, the fuel filter heater is not normally active when winter-grade diesel fuel is used. In order to save energy, the fuel filter heater is only switched on when the diesel actually becomes viscous due to low temperatures. There are two different control systems depending on whether the fuel supply system is speed-controlled or pressure-controlled.

Remember that your car may have been serviced before and had parts replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve, as they grow older. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

The diesel fuel filter on BMW E90 models should be replaced every 30,000 miles or once every other year. The filter is located beneath the vehicle on the driver's side, mounted on the frame rail. The fuel system will require bleeding. Read the procedure thoroughly before beginning.

This photo shows the fuel filter (red arrow) and the fuel filter heater (blue arrow).
Figure 1

This photo shows the fuel filter (red arrow) and the fuel filter heater (blue arrow).

With your vehicle raised and supported safely, look under the vehicle in the area of the driver floor.
Figure 2

With your vehicle raised and supported safely, look under the vehicle in the area of the driver floor. You will need to remove the underbody splash shield. Remove the eight 8mm fasteners (red arrows). Then rotate the splash shield until the locking tab (blue arrow) clears the shield and the shield can be removed.

Working at the fuel filter heater, disconnect the electrical connector (red arrow) by squeezing the release tab and pulling it straight off.
Figure 3

Working at the fuel filter heater, disconnect the electrical connector (red arrow) by squeezing the release tab and pulling it straight off.

Disconnect the negative (-) battery cable.
Figure 4

Disconnect the negative (-) battery cable. See our tech article on battery connection notes. Before removing your fuel filter, have a suitable container available to catch any fuel that spills when the fuel lines are loosened or removed. Have clean rags available to wipe up excess fuel and have a fire extinguisher handy. Eye and hand protection are a must. If fuel comes in contact with your skin, wash it off immediately. Also, make sure to work in a well-ventilated area. Do not allow fuel vapors to gather. This is a repair best suited for the outdoors, on solid level ground. Start by cutting the hose clamps off the fuel lines (red arrows). You will have to replace these clamps with new ones. Once the clamps have been removed, remove the 13mm fuel filter mounting bracket fastener (blue arrow).

Working at the outlet side of the fuel filter, remove the fuel line from the filter (red arrow) and allow the fuel to drain into a suitable container.
Figure 5

Working at the outlet side of the fuel filter, remove the fuel line from the filter (red arrow) and allow the fuel to drain into a suitable container. Cover the fuel line with a rag as you remove it to avoid fuel spillage.

Next, check that the fuel is clean and free from contaminants.
Figure 6

Next, check that the fuel is clean and free from contaminants. Once the filter is drained, remove the inlet fuel line.

Pull the fuel heater clip out of the fuel filter (blue arrows).
Figure 7

Pull the fuel heater clip out of the fuel filter (blue arrows).

Pull the fuel heater straight out of the fuel filter.
Figure 8

Pull the fuel heater straight out of the fuel filter. Give your workspace at least 15 minutes to air out before installing the new filter.

Install the fuel heater into the new fuel pump.
Figure 9

Install the fuel heater into the new fuel pump. Then install the retaining clip. Transfer the rubber insulator and mount to the new fuel filter. You will have to remove an additional T20 Torx screw from the mounting bracket to get it off the old filter. Then install the fuel lines and tighten the fuel line clamps (blue arrow) using fuel line clamp crimping pliers (red arrows). Once the lines are on and the fuel filter is aligned, install the mounting bracket fasteners

Once the new filter is installed, you will have to bleed the system.
Figure 10

Once the new filter is installed, you will have to bleed the system. BMW suggests using a scan tool and following the instructions. I have done a bunch of these and bled them via a scan tool and some without. If you do not have a scan tool, do not worry. To bleed without one, press the START button. Do not start the engine, place it in the RUN position, so the warning lights 9-check engine are illuminated. The fuel pump will run. Leave it this way for one minute. The fuel pump will prime. Then reset the ignition and attempt to start the engine. Allow the engine to idle for ten minutes. Shut the engine OFF, and restart engine. The fuel system should be bled. Then recheck your work and confirm there are no fuel leaks. Once you are sure no fuel leaks are present, reinstall the fuel filter cover. Clean up any spilled fuel remaining and properly dispose of the old fuel filter.

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Comments and Suggestions:
RKH Comments: Hi thank you for your hard work and nice instructions. At he end you mention to bleed: "place it in the RUN position, so the warning lights 9-check engine are illuminated" After pressing the start how do you place it in RUN position please?
November 6, 2016
  Followup from the Pelican Staff: Press button twice, engine off, the check engine light will illuminate. - Nick at Pelican Parts  
Car man Comments: Will the fuel pump of BMW X1 E84 Diesel run and prime itself it we live it in ignition position for a minute or more.
April 19, 2016
  Followup from the Pelican Staff: You may need to cycle the key a few times. - Nick at Pelican Parts  
KELVIN Comments: YES THIS IS THE PART IM LOOKING FOR,I NEED THE COMPLETE SET
FUEL STRAINER WITH HEATING PART NI 13 327 802 939.HOW MUCH DOES IT COST,CAN YOU SHIP IT TO MALAYSIA AND HOW LONG DOES IT TAKE
March 27, 2016
  Followup from the Pelican Staff: We may be able to . To be sure, Give our parts specialists a call at 1-310-626-8765 - Nick at Pelican Parts  
Reyf Comments: Excellent tutorial. I found it to be very helpful. Thanks
March 22, 2016
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
kelvin Comments: HI IM LOOKING FOR FUEL STRAINER WITH HEATING PART NI 13 327 802 939 I HEREBY ATTACH THE NECESSARY DETAILS FOR YOU.DO YOU DO DELIVERY TO MALAYSIA.IM LOOKING FOR A BRAND NEW PART.
March 7, 2016
  Followup from the Pelican Staff: Pelican Parts should be able to get it to you. Give our parts specialists a call at 1-310-626-8765 9. They can figure out what part or repair kit you need.
t- Nick at Pelican Parts
 
John Comments: Hi,
Where exactly is the location of the diesel fuel filter in a 2011 bmw 320 diesel e90 right hand drive?
February 9, 2016
  Followup from the Pelican Staff: RHD, I don;t have any experience with them. I can't say for sure. - Nick at Pelican Parts  

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Page last updated: Fri 12/9/2016 02:47:56 AM