The right filter for your 2004 Honda TRX350 TM

The Honda TRX350 TM uses a HF354 oil filter. This is the OEM (original equipment manufacturer) part number — the filter Honda designed for this model. You can find it at Honda dealers, online retailers, and most auto parts stores that stock ATV supplies. The filter costs between $8 and $15 depending on where you buy it.

If you cannot find the HF354, the HF353 is a compatible alternative that fits the same mounting location and performs the same job. Both are spin-on filters, meaning you unscrew the old one and screw the new one on by hand — no special tools needed beyond an oil filter wrench.

Key Takeaways

  • The OEM filter for a 2004 Honda TRX350 TM is the HF354, available at Honda dealers and most ATV parts retailers.
  • The HF353 is a direct substitute if the HF354 is unavailable, and both use the same spin-on design.
  • You will need an oil filter wrench to remove the old filter safely without damaging the mounting threads.
  • Change the filter every time you change the oil, which Honda recommends every 100 hours of operation or once a year, whichever comes first.

Where to buy the HF354 filter

Honda dealers stock the HF354 in their parts departments and can order it the same day if they do not have it on hand. Expect to pay full retail price, usually $12 to $15. The advantage is that you know you have the exact OEM part, and the dealer can confirm fitment before you leave.

Online retailers like Amazon, eBay, and RockAuto carry both the HF354 and HF353 at lower prices, often $8 to $12. Shipping takes three to seven days. Local auto parts chains — AutoZone, O'Reilly, Advance Auto Parts — stock the HF354 in their ATV sections, and you can check availability online before you drive there. Some locations offer same-day pickup.

How to install the new filter

Drain the old oil first by removing the drain plug at the bottom of the engine and letting it run into a pan. Once the oil stops dripping, replace the drain plug and tighten it by hand, then a quarter-turn more with a wrench. Do not over-tighten — you can strip the threads.

Locate the filter on the side of the engine. Use an oil filter wrench to turn it counterclockwise until it comes free. Wipe the filter mounting surface clean with a rag. Take the new HF354 filter and coat the rubber gasket (the flat ring on top) with a thin layer of fresh oil. Screw the new filter on by hand until the gasket touches the mounting surface, then turn it another three-quarters of a turn. Do not use the wrench to tighten it — hand-tight is correct.

Add new oil through the filler cap on top of the engine. The TRX350 TM holds 1.5 quarts with a filter change. Pour in 1.5 quarts, wait a minute, then check the level on the dipstick. Add a little more if needed to reach the full mark. Start the engine, let it run for 30 seconds, shut it off, wait a minute, and check the level again. Top up if necessary.

Why the HF354 matters for your machine

The oil filter traps metal particles, dirt, and debris that circulate through the engine. A clogged or low-quality filter lets those particles stay in the oil, which speeds up wear on pistons, rings, and bearings. The HF354 is designed to flow the right amount of oil while catching particles down to a specific micron size — small enough to protect the engine without restricting oil flow so much that the engine runs hot.

Using a filter that does not match your engine's specifications can cause the engine to run lean (too little oil flow) or to bypass unfiltered oil when the filter gets dirty. Either way, you shorten the life of the engine. Sticking with the HF354 or its direct substitute, the HF353, keeps your TRX350 TM running as Honda intended.

Maintenance schedule and filter life

Honda recommends changing the oil and filter every 100 hours of operation or once a year, whichever comes first. If you ride your TRX350 TM regularly — say, 10 to 15 hours a week — you will hit 100 hours in about two months. If you ride seasonally or store the machine for winter, you may only change it once a year.

Keep a log of your oil changes by date and hour meter reading. This helps you stay on schedule and gives you a record if you ever sell the machine. A new filter costs less than $15, and the time to change it is 20 to 30 minutes — far cheaper than an engine rebuild if you skip changes and let the oil get dirty.

Frequently Asked Questions

Can I use a car oil filter on my TRX350 TM?

No. Car filters have different thread sizes and flow rates designed for car engines. Using the wrong filter can cause oil pressure problems or leaks. Always use the HF354 or HF353 made for Honda ATVs.

What if I cannot find an HF354 anywhere?

The HF353 is the direct substitute and fits the same way. If neither is available, contact a Honda dealer — they can order the HF354 and have it in a day or two. Do not use an unmarked or generic filter as a workaround.

Do I have to change the filter every time I change the oil?

Yes. The filter collects debris over time, and reusing it defeats the purpose of changing the oil. A new filter is inexpensive and takes two minutes to swap. Always replace it together with the oil.

How tight should the filter be when I screw it on?

Hand-tight plus three-quarters of a turn. If you use a wrench to tighten it further, you risk crushing the gasket or stripping the threads on the engine. The filter will not leak if you follow this rule.