The most common answer is that 2012 Civics with the 1.8-liter engine use Honda’s OEM oil filter 15400-PLM-A02, while the 2.4-liter Si variant uses 15400-PLM-A01. Aftermarket filters from reputable brands can also fit, as long as they match the same thread size and gasket specifications. Always double-check with your VIN or owner's manual to be certain.
The 2012 Honda Civic lineup offered two main engine configurations in North America: the standard 1.8L i-VTEC (R18A) and the higher-performance 2.4L variant found in the Civic Si. This article explains which filter corresponds to each engine and how to choose a compatible aftermarket option.
Engine options in the 2012 Civic
1.8L i-VTEC (R18A)
The vast majority of 2012 Civics used the 1.8-liter i-VTEC engine. For this engine, the official Honda oil filter is designed to fit the R18A block and is typically listed as 15400-PLM-A02 in many parts catalogs. Aftermarket filters are available from brands such as Bosch, Denso, Wix, Purolator, and K&N, provided they specify compatibility with the 1.8L Civic and match the correct thread size and gasket.
2.4L i-VTEC (K24) — Civic Si
The Civic Si in 2012 used a larger 2.4-liter engine. The Honda OEM oil filter most commonly cited for this setup is 15400-PLM-A01. As with the 1.8L engine, there are aftermarket options from major brands that fit the 2.4L Si as long as they are listed as compatible with the 2012 Civic Si and the same threading/gasket specifications.
Which oil filter should you buy for your Civic?
Below are the two primary paths depending on your engine. Use the preface paragraph to understand what the list covers, then review the items.
Options for the 1.8L Civic (R18A) you can consider:
- OEM Honda oil filter: 15400-PLM-A02
- Quality aftermarket filters from reputable brands that fit the 1.8L Civic (verify compatibility with your exact year/model and engine code)
Concluding guidance for the 1.8L engine: Always confirm that the filter is specified to fit the 2012 Civic with the 1.8L engine and that the thread size and gasket match your filter mounting.
Options for the 2.4L Si engine (K24) you can consider:
- OEM Honda oil filter: 15400-PLM-A01
- Quality aftermarket filters from brands such as Bosch, Denso, Wix, Purolator, or K&N that explicitly state compatibility with the 2012 Civic Si (2.4L)
Concluding guidance for the 2.4L engine: Use a filter confirmed to fit the 2012 Civic Si and verify that it matches the 2.4L engine’s thread size and gasket specifications.
How to verify compatibility
To avoid mistakes, use these checks before purchase:
- Know your exact engine: 1.8L i-VTEC (R18A) vs. 2.4L (Si). The filter part number differs between them.
- Consult the owner’s manual or vehicle VIN to confirm the correct filter specification.
- When buying aftermarket, read the product listing for “fits: Honda Civic 2012” and ensure it lists your engine variant.
- Ask the parts counter to cross-check the filter with your VIN or engine code if in doubt.
Verification helps ensure you get the correct physical characteristics (thread size, gasket diameter, and height) so the filter seals properly and torque specs are maintained.
Summary
For the 2012 Honda Civic, the right oil filter depends on the engine. The 1.8L Civic typically uses Honda part 15400-PLM-A02, while the 2.4L Si uses 15400-PLM-A01. You can also use reputable aftermarket filters that explicitly state compatibility with the 2012 Civic and match the engine type, thread size, and gasket. Always double-check with your VIN or owner’s manual to ensure a precise match.