The correct oil filter depends on your Civic’s engine. For most 2009 Civics with the 1.8-liter engine, use Honda Genuine Oil Filter 15400-PLM-003; for the 2.0-liter engine (Civic Si), use 15400-PLM-004. Always verify with your VIN or the current filter to be sure.
In 2009, the Civic lineup mainly included two gasoline engine options: the 1.8L i4 (R18A1) for most trims and the 2.0L i4 (K20Z3) for the Civic Si. The oil filter must match the engine family to ensure proper filtration and fit. The following sections outline how to identify your engine and confirm the correct part numbers.
Identify your engine to select the correct filter
To pick the right filter, first determine which engine powers your Civic. The common 1.8L engine is used in most LX/EX models, while the 2.0L engine powers the Civic Si.
Engine variants in 2009 Civic
- 1.8L I4 (R18A1) — used in most LX, EX, and EX-L trims
- 2.0L I4 (K20Z3) — used in the Civic Si
Note: The 2.0L engine family drives the higher-performance Si, and its oil filtration requirements align with that engine family.
OEM oil filter part numbers by engine
Use the official Honda part numbers based on engine. If your car’s production date differs, verify with a dealer or by inspecting the current filter.
- 1.8L engine (R18A1): Honda Genuine Oil Filter 15400-PLM-003
- 2.0L engine (K20Z3, Civic Si): Honda Genuine Oil Filter 15400-PLM-004
If you’re unsure which one applies, check the sticker on the old filter, consult the owner's manual, or contact a Honda dealer with your VIN for exact confirmation.
Aftermarket cross-reference options
Many reputable aftermarket filters fit the 2009 Civic’s 1.8L and 2.0L engines. When shopping aftermarket, look for filters labeled to fit Honda Civic 2006-2011 with 1.8L or 2.0L engines. Ensure the filter has the correct thread size and gasket diameter for your specific engine, and confirm compatibility on the manufacturer’s site or with a parts professional.
- Follow the manufacturer’s fitment guide for your exact engine and production year; if in doubt, ask a parts specialist or refer to your VIN.
Rely on OEM numbers for certainty, but aftermarket options from reputable brands can save money while matching the same specifications.
Where to buy and how to install
Purchasing from a dealer guarantees you receive the precise part for your VIN, but many aftermarket filters also fit. When installing, replace the drain plug gasket if recommended, lightly oil the gasket on the new filter, and follow the Honda-recommended oil-change intervals for your engine.
Summary
For a 2009 Honda Civic, the oil filter you need is determined by the engine: 1.8L uses 15400-PLM-003; 2.0L (Civic Si) uses 15400-PLM-004. Verify the exact part using your VIN, the current filter, or the owner's manual. OEM parts offer the safest match, while well-qualified aftermarket filters can be suitable alternatives.