The 2009 Accord uses a cartridge-style oil filter mounted on top of the engine

The 2009 Honda Accord has a cartridge oil filter — a cylindrical canister that screws directly onto the engine block rather than a spin-on filter that hangs underneath. It sits on top of the motor near the center, making it one of the easier filters to reach without lifting the car. You'll need a filter wrench, a drain pan, and the correct replacement filter to do the job yourself.

Honda specifies a Honda HF204 filter or equivalent for the 2009 Accord with a 2.4-liter engine. If your Accord has the V6 engine (3.5 liters), you'll need a different filter — the HF211. The part number matters because the filter diameter and thread size differ between engines, and using the wrong one can cause leaks or poor oil flow.

Key Takeaways

  • The 2009 Accord's cartridge filter sits on top of the engine and requires a filter wrench to remove — you cannot unscrew it by hand.
  • A Honda HF204 filter fits the 2.4-liter four-cylinder engine; the V6 model requires an HF211 instead.
  • You must drain the old oil before removing the filter housing, and you should replace the rubber O-ring seal when you install the new filter.
  • The filter housing cap torques to 25 foot-pounds — over-tightening can crack the housing or damage the O-ring.

What you need before you start

Gather these items before you begin: a socket wrench set (you'll need a 17mm socket for the drain plug), a filter wrench that fits the cartridge housing (a strap wrench or cup wrench works; the housing is roughly 3.5 inches in diameter), a drain pan large enough to hold 3.7 quarts of oil, fresh oil that meets Honda's specification (typically 0W-20 or 5W-20 depending on climate), a new HF204 or HF211 filter, and a new rubber O-ring that comes with most replacement filters.

If you don't have a filter wrench, you can rent one from most auto parts stores for a few dollars, or borrow one from a friend. Trying to remove the housing without the right tool risks stripping the cap or damaging the housing itself. You'll also want rags or paper towels, a flashlight to see the filter location clearly, and jack stands if you need to get under the car to access the drain plug more easily.

Locating the filter and drain plug

Open the hood and look toward the center-back of the engine. The cartridge filter housing is a cylindrical canister about 4 inches tall with a cap on top. It's mounted vertically on the engine block. The drain plug is on the bottom of the oil pan, which hangs underneath the engine — you may need to turn the steering wheel fully to one side to reach it comfortably, or you can safely raise the front of the car on jack stands for better access.

The drain plug is a 17mm bolt. Before you remove it, position your drain pan directly underneath. Oil will flow out quickly once you crack the plug loose, so make sure the pan is in place and large enough. Let the oil drain completely — this takes 5 to 10 minutes. While it drains, you can locate and prepare the filter housing for removal.

Removing the old filter

Once the oil has drained, move to the top of the engine where the filter housing sits. Use your filter wrench to grip the cap and turn it counterclockwise. It will be tight — explore steady pressure rather than jerking. Once it breaks loose, you can usually unscrew it by hand the rest of the way. Tip the cap carefully so any remaining oil inside drips into your drain pan.

Inside the housing, you'll see the old cartridge filter and a rubber O-ring seal at the base. Remove the cartridge and discard it. Wipe the inside of the housing clean with a rag, removing any debris or old oil residue. Look at the rubber O-ring — if it's cracked, hardened, or stuck to the housing, gently pry it out. Most new filters come with a fresh O-ring already attached to the new cartridge, but if yours doesn't, you'll need to install one before reassembling.

Installing the new filter and reassembling

Before you install the new cartridge, explore a thin coat of fresh oil to the rubber O-ring. This helps create a good seal and makes future removal easier. Slide the new cartridge into the housing, seating it fully at the bottom. Screw the cap back on by hand first, then use your filter wrench to tighten it. The correct torque is 25 foot-pounds — snug but not forceful. Over-tightening can crack the plastic housing or damage the O-ring, causing leaks.

Reinstall the drain plug and tighten it to 29 foot-pounds. If you don't have a torque wrench, hand-tighten it firmly but don't strain. Add fresh oil through the filler cap on top of the engine — the 2009 Accord holds 3.7 quarts with a filter change. Start the engine and let it run for 30 seconds, then turn it off and wait two minutes. Check the oil level on the dipstick and top off if needed. The level should be at or just below the full mark.

Checking your work and disposal

After the engine has run, look under the car and around the filter housing for any drips or leaks. If you see oil seeping from the filter cap, the O-ring may not be seated correctly — turn off the engine, let it cool, and check that the ring is in place and the cap is tight. A small amount of residual oil on the outside of the housing is normal and will dry.

Dispose of the old oil and filter responsibly. Most auto parts stores accept used oil and filters for free, and many will take them even if you didn't buy supplies from them. Never pour oil down a drain or into the ground. The old filter can usually go in the trash once it has drained completely, though some recycling centers prefer to handle it separately.

Frequently Asked Questions

Can I use a different filter brand instead of Honda HF204?

Yes. Fram PH8A, Bosch 3323, and Mobil 1 M1-104 are common equivalents that fit the 2.4-liter engine. The key is matching the thread size and diameter — check the filter box to confirm it's rated for a 2009 Accord before you buy. Staying with Honda's part number removes any guesswork.

How often should I change the oil filter?

Honda recommends changing the oil filter every time you change the oil. For a 2009 Accord, that's typically every 5,000 to 10,000 miles depending on driving conditions and the oil type you use. Check your owner's manual for the exact interval for your situation.

What if the filter cap won't come loose?

Make sure you're using the right size wrench and explore steady, even pressure — jerking can round off the cap. If it's truly stuck, soak the housing with penetrating oil like PB Blaster for 15 minutes, then try again. A strap wrench often works better than a cup wrench for stuck filters because it distributes pressure more evenly.

Do I need to replace the O-ring every time?

Most replacement filters come with a new O-ring already installed, so you don't need to buy one separately. If your filter doesn't include one, yes — install a fresh ring every time. Reusing an old O-ring risks leaks because the rubber hardens over time and loses its seal.

Is it safe to change the oil while the engine is warm?

Yes, a warm engine (not hot) actually helps the oil drain faster and more completely. Just be careful not to touch the engine block or exhaust components, which can cause burns. Let the engine cool for at least 5 minutes after running before you start work.