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DIY Air Filter Change

impee's DIY Air Filter Change for BMW 318i e46
How to Change an Air Filter yourself!

Difficulty Level: Easy

Approximate Time For This Project: 1 hour

Prices: Professional labour costs for Air Filter Change - £55 (private) or £155 (BMW) - per hour X 1 hours

Air Filter Element Part number: 13717503141 Part #2. BMW 1 £30
Air Filter Element Non Original 1 £15
Screwdriver Flat head and Phillips 1  
Socket Wrench + extentsion bar 1  
10mm Socket 1  
10mm Spanner   from your BMW tool kit 1  

*prices correct at time of publication

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1) Assemble Your Kit + Notes

Below is the total kit I used. As you can see, there aren't many tools required for this job at all.
A save time tip is for you to also clean your Mass Air Flow Sensor (MAFS) at the same time you change your Air filter. Follow my
DIY here.

Change Duration: The Air filter should be replaced no sooner than every 10-15k miles.

Note: If your car is not exactly the same model as mine, please check if takes the the rectangle or circle shaped Air Filter.

Kit for Air Filter


2) Engine Cover - Removal

Remove the main big BMW cover (Intake Manifold) at the front of engine using this method:

1) Remove the 2 front clips at the front - pull up and then out the small round black pins (expanding rivets) with a flat head screw driver

2) Un-clip the hook on the top left

3) Remove the large hose on the top right

BMW Engine Cover Removal


3) The Air Filter Housing, Intake Silencer - Open

This is the housing for the Air Filter, the Intake Silencer. Use a 10mm Socket to open the 2 nuts.

Air Filter Housing


4) Wiring Plug - Detach

Press a small clip on the plug and pull of the Wiring Plug.

Air Filter Plug


5) Intake Hose - Removal

Loosen this screw with the Flat Head Screwdriver and then pull of the big hose, the Intake Hose.

Hose Pipe Clip


6) Intake Silencer - Removed

You can see the Intake Hose and Wiring Plug unplugged.

Also in this photo, see the arrow...this is pointing to the location where the Vacuum Hose fits - this is a thin black rubber pipe. As you can see in this photo, mine had come off, hence when you are putting everything back together, ensure you fit the Vacuum Hose back in!

Air Filter Housing Removed


7) Intake Silencer - Removed

The Intake Silencer removed.

Air Filter Housing removed


8) Intake Silencer - Opening

Open the 7 silver screws dotted all around the under side of the Intake Silencer to allow you to take the top off.

Air Filter Housing upside down


9) Removing Air Filter

Use the 10mm Spanner to remove the 2 nuts. Then pull of this circular item, the Mass Air Flow Sensor (MAFS). This will then release the Air Filter.

Swap the Air Filter with the new one and then put the Mass Air Flow Sensor back, with the 2 nuts.

Air Filter Housing


10) Air Filter Comparison

There may not appear to be such a big visible difference between the new and old Air Filter, however the car'a performance will change notably and your fuel consumption will improve.

Air Filter Comparison


11) Re-assembly

Now work in reverse order following all the above steps.

Ensure you put back the Intake Hose, the Vacuum Hose and then tighten the Intake Hose clip and also plug back in the Wiring Plug.

BMW e46 Care Care e46 Models Fuse Box On Jack Stands Fault Diagnosis Torque Specifications Air Filter Change Alloy Repair Jack Stands CDV Delete Clutch Bleed Differential Oil Final Stage Resistor Fuel Filter Change Headlight Removal Interior Lights MAFS Clean Oil Change Oil Light Reset Power Steering Fluid Radiator Flush Radiator Fan Change Shiny Steering Wheel Spark Plug Change Transmission Fluid Window Regulator Timing Chain Tensioner Airbag Occupancy Mat Sensor Rear Light Clean BMW Fault Code Read impee impeeCreations BackInfo

DIY BMW e46 Air Filter Change by - impee

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