What Is the Oil Filter Number for a 2004 Acura TSX?

For most 2004 Acura TSX models with the 2.4L 4‑cylinder engine, the commonly used oil filter reference is the Honda/Acura part number 15400‑PLM‑A02 (or its superseding equivalents), while major aftermarket cross-references include filters such as Fram PH7317, Wix 51356, Bosch 3323, and Mobil 1 M1‑110A. In practice, your exact choice depends on brand, availability, and whether Honda has superseded the part number at your dealer.

Understanding the 2004 Acura TSX Oil Filter Specification

The 2004 Acura TSX sold in North America uses Honda’s K24A2 2.4‑liter inline‑four engine. This engine shares its oil filter fitment with many Honda and Acura models of the same era, which is why there are numerous interchangeable part numbers across OEM and aftermarket brands. Although many filters will physically fit, it is important to use one that meets or exceeds the manufacturer’s specifications for filtration quality, pressure relief, and anti‑drainback valve performance.

OEM (Genuine Acura/Honda) Oil Filter Numbers

Acura and Honda have used a few very similar part numbers over the years, with some being superseded by newer codes. These are the primary OEM numbers most owners will encounter when buying directly from a dealer or a reputable OEM parts supplier.

• 15400‑PLM‑A02 – Long-time standard “blue” Honda/Acura oil filter used on many 4‑cylinder engines, including the 2004 TSX.
• 15400‑PLM‑A01 – Older version of the same basic filter; functionally similar and often interchangeable with A02.
• 15400‑RTA‑003 – A later Honda replacement filter that is listed as a superseding or alternate part for many PLM‑series applications in some catalogs.
• 15400‑RTA‑004 – Another superseding variant, depending on market and dealership supply chain; also used on multiple Honda/Acura 4‑cylinder engines.

In dealership practice, you are most likely to receive whatever current Honda filter supersedes the earlier PLM‑A02 listing, but it will still be backward-compatible with the 2004 TSX specification and typically share the same thread size, gasket diameter, and filtration characteristics.

Aftermarket Cross‑Reference Filters for a 2004 TSX

Most parts stores will sell aftermarket filters that are direct replacements for the OEM Honda filter. These typically cross‑reference to the PLM‑A02 size and specification and are available in a wide range of price and performance levels.

• Fram: PH7317 (standard), XG7317 (Ultra synthetic, higher-end)
• Wix: 51356 (premium) and 57356 (in some product lines)
• Bosch: 3323 (Premium), 3323 DistancePlus or equivalent upgraded variants
• Mobil 1: M1‑110A (extended performance synthetic media)
• K&N: HP‑1004 or PS‑1010 (depending on catalog year; both commonly listed for this engine)
• Purolator: PL14610 (Boss or PureONE), L14610 (standard)

While these filters share the correct fitment and are widely used by owners and shops, it is still wise to confirm the part number at the counter or on the manufacturer’s website, especially as some lines are periodically renamed or reorganized without changing the underlying fitment.

How to Confirm the Correct Filter for Your Specific TSX

Although the 2004 TSX is a relatively straightforward application, variations in markets, production dates, and catalog updates mean you should verify the filter before purchase or installation. Doing so reduces the risk of leaks, poor oil pressure behavior, or using a filter with inadequate internal construction for your maintenance intervals.

Steps to Verify Fitment

The following steps can help ensure you are using the correct filter number for your vehicle, regardless of where you buy it or which brand you prefer.

1. Check your owner’s manual: Look under the maintenance or specifications section for the recommended oil filter or a note to use a genuine Honda/Acura replacement.
2. Consult the dealer: Call an Acura dealer with your VIN; they can confirm the current superseding OEM part number (e.g., if 15400‑PLM‑A02 has been replaced by 15400‑RTA‑003/004 in their system).
3. Use online catalog tools: Reputable brands like Wix, Bosch, and Mobil 1 provide online lookup tools where you enter “2004 Acura TSX 2.4L” to get the exact cross‑reference number.
4. Verify physical dimensions: Confirm the thread size (M20 x 1.5), gasket diameter, and overall filter length when comparing lesser‑known brands or off‑brand filters.
5. Avoid unverified knockoffs: If pricing seems unusually low on marketplace sites, be cautious; counterfeit filters can look correct but perform poorly or even fail.

Using these verification steps helps ensure that the filter you select is both dimensionally correct and meets the performance expectations established by the original Honda design.

Service Considerations and Best Practices

The oil filter is a relatively small component, but it plays a critical role in protecting the K24A2 engine from wear and sludge buildup. Using a quality filter and following sound installation practices will have a direct impact on long‑term engine health.

Recommended Replacement Intervals

Honda’s maintenance schedules for vehicles of this era typically call for filter replacement at each oil change. However, your exact interval depends on driving conditions, oil type, and personal maintenance preferences.

• Conventional oil: Commonly 3,000–5,000 miles (4,800–8,000 km) between changes, with the filter replaced every time.
• Synthetic oil: Often 5,000–7,500 miles (8,000–12,000 km), sometimes up to 10,000 miles if using a premium extended‑life filter and driving mostly highway miles.
• Severe service: Short trips, extreme temperatures, or heavy stop‑and‑go may justify shorter intervals regardless of oil type.

Sticking to a consistent interval (with both oil and filter changed together) is more important than stretching changes just because a filter is advertised as “extended‑life,” especially on an older engine.

Installation Tips for the 2004 TSX Oil Filter

Proper installation reduces the risk of leaks, start‑up rattle, or loosening under vibration. The general procedure is straightforward and similar to other Honda 4‑cylinder engines.

1. Pre‑check: Confirm the new filter’s part number and compare its gasket and thread area visually to the old filter.
2. Remove old filter: After draining the oil, use a suitable wrench if necessary, and ensure the old gasket comes off with the filter.
3. Clean mounting surface: Wipe the filter base on the engine to remove old oil and debris.
4. Oil the new gasket: Lightly coat the rubber gasket of the new filter with fresh engine oil to improve sealing and ease removal next time.
5. Hand‑tighten only: Spin the filter on until the gasket contacts the base, then tighten by hand an additional three‑quarters to one full turn (follow the instructions on the filter body).

Adhering to these installation points helps ensure a proper seal and avoids overtightening, which can damage the gasket or make the filter extremely difficult to remove at the next service.

Summary

For a 2004 Acura TSX with the 2.4L engine, the standard OEM oil filter is most commonly referenced as Honda/Acura 15400‑PLM‑A02, with later dealer stock often superseded to filters such as 15400‑RTA‑003 or 15400‑RTA‑004. Widely used aftermarket equivalents include Fram PH7317, Wix 51356, Bosch 3323, Mobil 1 M1‑110A, and comparable part numbers from Purolator and K&N. Always confirm with your owner’s manual, dealer, or a reputable online catalog by entering your exact year, make, model, and engine to ensure compatibility. Regularly replacing both oil and filter at sensible intervals, and installing the filter correctly, will help the 2004 TSX’s K24A2 engine remain reliable and long‑lasting.