The 2009 Honda Civic uses a cartridge-style oil filter located on top of the engine

The 2009 Honda Civic's oil filter is not a spin-on canister like you might find on larger vehicles. Instead, it's a cartridge filter housed in a plastic cap on the top of the engine, near the front. The filter element sits inside this cap and needs to be replaced during each oil change. You'll need to remove the cap, take out the old filter, and install a new one — a process that takes about 10 to 15 minutes once you have the right part and tools.

The location makes this job straightforward for a DIY oil change. You don't need to get under the vehicle or work around other components. The cap is accessible from above, and the whole assembly is designed to be removed by hand or with a basic wrench.

Key Takeaways

  • The 2009 Civic's cartridge filter is housed in a cap on top of the engine, not a spin-on canister underneath.
  • You will need a new filter element, a crush washer, and either a filter wrench or a 64mm socket to remove the cap.
  • The filter cap should be torqued to 25 foot-pounds after installation to avoid leaks and over-tightening.
  • Both the filter element and the crush washer must be replaced at every oil change; reusing either one can cause leaks.

What filter part number fits a 2009 Honda Civic

Honda's official part number for the 2009 Civic filter element is 15400-PLM-A01 or 15400-PLM-A02, depending on your engine type. The 1.8L four-cylinder engine (the standard engine in most 2009 Civics) uses the PLM-A01. If you have the hybrid model, confirm with your parts supplier which version you need, as it may differ slightly.

Aftermarket filters from Fram, Mobil 1, Bosch, and other brands also fit the 2009 Civic, and most are less expensive than Honda's OEM part. Any cartridge filter marketed for the 2009 Civic will have the same dimensions and thread pattern. You will also need a new crush washer (also called a sealing washer) — Honda part number 90430-R70-003 — because this washer must be replaced every time you change the filter to prevent leaks.

Tools and materials you'll need

To remove and replace the filter cap, you have two options. The first is a 64mm oil filter socket, which slides over the cap and connects to a ratchet wrench. This is the cleanest approach and costs $10 to $20. The second is a filter wrench — a band-style or strap wrench that grips the cap and lets you turn it by hand. Either tool works, but the socket is faster and less likely to slip.

You will also need a drain pan to catch any oil that spills when you remove the cap, a clean rag or paper towels, and the new filter element and crush washer. Some people use a small amount of fresh oil to coat the rubber gasket on the new filter before installation, which can help create a better seal, though it is not required.

Step-by-step removal and installation

Start with the engine cold or warm but not hot — warm is actually better because the oil flows more easily, but you want to avoid burns. Locate the filter cap on top of the engine; it's a round plastic housing about 3 inches in diameter. Place your drain pan underneath, then use your 64mm socket or filter wrench to turn the cap counterclockwise. It will come off by hand once you've loosened it a few turns.

Inside the cap, you'll see the old filter element sitting in a spring-loaded holder. Lift it straight out and set it aside. Wipe the inside of the cap clean with a rag, paying special attention to the rubber gasket that seals against the engine. Any dirt or old rubber bits left behind can cause leaks. Check that the old crush washer came out with the filter; if it's stuck to the engine, remove it carefully.

Insert the new crush washer onto the threaded post inside the cap, then slide the new filter element down over it. The filter should sit flat against the spring. Hand-tighten the cap back onto the engine, then use your socket or wrench to tighten it to 25 foot-pounds of torque. This is firm enough to seal but not so tight that you'll strip the threads or crush the filter. If you don't have a torque wrench, tighten it snugly by hand and then give it an additional quarter-turn with the wrench — this usually lands close to the correct torque.

Start the engine and let it run for 30 seconds, then turn it off and wait a minute. Check around the cap for any drips. If you see oil leaking, the cap may not be tight enough or the crush washer may not be seated correctly. Tighten it slightly more, but do not over-tighten.

Common mistakes to avoid

The most frequent error is forgetting to replace the crush washer. Many people reuse the old one to save a few dollars, but the washer compresses when tightened and loses its ability to seal. Reusing it almost always results in a slow leak that shows up a few days after the oil change. The washer costs less than $2, so always install a new one.

The second mistake is over-tightening the cap. The plastic housing can crack if you use too much force, and the threads can strip, making future removals difficult or impossible. Use a torque wrench if you have one, or hand-tighten and add only a quarter-turn with the wrench. Tighter is not better in this case.

A third issue is leaving dirt or old rubber inside the cap. Even a small piece of debris can prevent the new gasket from sealing properly. Take 30 seconds to wipe the inside clean before installing the new filter.

When to replace the oil filter on a 2009 Civic

Honda recommends changing the oil and filter every 10,000 miles or once a year, whichever comes first. If you drive mostly on highways at steady speeds, you may be able to stretch this interval slightly, but if you do a lot of stop-and-go city driving or tow anything, stick to 10,000 miles. The filter should always be replaced at the same time as the oil; there is no reason to change one without the other.

Some owners use synthetic oil, which can extend the oil change interval to 15,000 miles or longer depending on the oil brand and your driving conditions. Even if you use synthetic, replace the filter at the same interval as the oil. Check your owner's manual or the oil bottle for the manufacturer's recommendation for your specific situation.

Frequently Asked Questions

Can I use any cartridge filter, or does it have to be Honda brand?

Any cartridge filter designed for the 2009 Civic will work. Aftermarket brands like Fram, Mobil 1, Bosch, and Purolator are all compatible and often cost less than Honda's OEM filter. Check the packaging to confirm it fits a 2009 Civic before you buy.

What happens if I don't replace the crush washer?

The old washer has already been compressed and will not seal as tightly as a new one. You'll likely see a slow oil leak around the cap within a few days. Always install a new crush washer with every filter change.

How tight should the filter cap be?

Tighten it to 25 foot-pounds if you have a torque wrench. If you don't, hand-tighten it until snug, then add only a quarter-turn with a wrench. Over-tightening can crack the plastic housing or strip the threads.

Do I need to add oil to the new filter before installing it?

It's optional but can help create a better seal. If you do, use a small amount of fresh oil to coat the rubber gasket on the new filter. This is not required for the filter to work, but some technicians recommend it.

Where do I dispose of the old filter?

Most auto parts stores and service stations will take used oil filters for free. Some recycling centers also accept them. Never throw a used filter in the trash — it still contains oil and should be recycled.