How to Remove Oil Filter from Cap in BMW N54, N55, S55, N52, N20, N26 Engines?

by Ashish Mishra

BMW engines, including the N54, N55, S55, N52, N20, and N26, feature an oil filter housed inside a plastic cap. When changing the oil, removing the filter from this cap can sometimes be tricky, especially if it is stuck. Whether you are a DIY enthusiast or simply looking to save on maintenance costs, here is a straightforward guide to help you remove the oil filter safely and efficiently.

Tools You’ll Need

  • 86mm oil filter wrench (BMW-specific)
  • Ratchet and extension
  • Gloves (optional, but recommended)
  • Shop towels or rags
  • Plastic prying tool (if needed)

Step-by-Step Guide to Removing the Oil Filter from the Cap

1. Drain the Oil (If Needed)

Before removing the oil filter, ensure the engine is cool enough to work on. If you’re performing a full oil change, drain the oil from the engine by removing the drain plug. If you only need to replace the filter, you can skip this step.

2. Locate and Remove the Oil Filter Housing Cap

The oil filter housing is typically found on the top of the engine. Use the 86mm oil filter wrench to loosen the cap by turning it counterclockwise. Be prepared for some oil to drip out as you remove it.

3. Pull Out the Oil Filter

Once the cap is off, the oil filter will still be attached to it. In most cases, you can simply pull the filter straight out with a firm tug. If it feels stuck, try twisting it slightly while pulling. To avoid damaging the cap, do not use too much force.

4. Use a Plastic Pry Tool (If Necessary)

If the filter is really stuck and won’t budge by hand, gently use a plastic prying tool to separate it from the cap. Insert the tool between the filter and the cap and apply light pressure. Avoid using metal tools, as they can scratch or damage the plastic housing.

5. Check for Any Remaining O-Rings or Seals

Once the filter is removed, inspect the cap for any remaining rubber O-rings or seals. BMW oil filters come with a large O-ring around the cap, which should be replaced with a new one during reassembly. Use a small flathead screwdriver to carefully remove the old O-ring if necessary.

Reinstalling the Oil Filter and Cap

  • Insert the new oil filter into the cap. It should fit snugly without excessive force.
  • Lubricate the new O-ring with a small amount of fresh engine oil before placing it on the cap.
  • Screw the cap back onto the housing by hand to avoid cross-threading.
  • Use the oil filter wrench to tighten it to the manufacturer’s recommended torque (usually around 25Nm, but check your vehicle’s specifications).
  • If you performed an oil change, refill the engine with fresh oil before starting the car.

Final Check

Let the engine run for a minute after starting it. Check for leaks around the oil filter cap. If everything looks good, you’re done!

The Bottom Line

Removing the oil filter from the cap in BMW N54, N55, S55, N52, N20, and N26 engines is a straightforward task with the right tools and techniques. If the filter is stuck, a gentle pull or a plastic pry tool will do the trick.

Always replace the O-ring and ensure the cap is securely tightened to prevent leaks. You can change the oil filter on your BMW with confidence and ease if you follow these steps.

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