The engine air filter is typically 16546-ED000 for the 2.5L engine, while the cabin air filter is commonly 27133-JA000. Numbers can vary by engine and production run, so verify with your VIN or the official Nissan Parts catalog.
Understanding which filter you need is important because the 2011 Altima offered more than one engine option. There are separate part numbers for the engine air filter (intake) and the cabin air filter (Pollen/AC filter). This article outlines the common OEM numbers and how to confirm the exact fit for your car.
Engine air filter (intake) for the 2011 Altima
Engine air filters sit in the intake housing and protect the engine from dust and debris. For the 2011 Altima, there are different numbers depending on the engine size.
Common OEM engine air filter numbers reported for this year include the following. Use your VIN to confirm which applies to your specific car.
- 16546-ED000 (typical for the 2.5L QR25DE)
- 16546-AX01A (used for some 3.5L V6 configurations)
In practice, if your Altima has the 2.5L engine, 16546-ED000 is the most frequently cited match. If you drive a 3.5L V6, the alternative number is often required. Always double-check with the dealer or Nissan Parts by VIN to avoid ordering the wrong filter.
Cabin air filter (Pollen/AC filter) for the 2011 Altima
The cabin air filter sits in the HVAC housing and affects interior air quality. Nissan used a couple of different cabin filter part numbers across trims and production runs for the 2011 Altima.
Common OEM cabin filter numbers cited for this year include the following. Verify with your VIN to ensure the right match.
- 27133-JA00A
- 27277-JA00A
Most 2011 Altimas use 27133-JA00A, but some builds may require 27277-JA00A. If you’re replacing the cabin filter, remove the glovebox or dash panel as per the owner's manual to access the filter housing, then compare the existing filter to the part number on the packaging before buying.
How to confirm the exact part number for your car
To ensure you get the correct filter numbers for your specific 2011 Altima, use one of these verification methods:
- Check the vehicle identification number (VIN) and consult the official Nissan Parts catalog or a dealership.
- Look inside the engine compartment or HVAC panel for a label that lists the exact filter part number.
- Provide your engine size (2.5L or 3.5L V6) when contacting a parts retailer or searching online catalogs.
Verifying with VIN helps avoid ordering errors, since production runs and regional variations can yield different part numbers even within the same model year.
Summary
For a 2011 Nissan Altima, the most commonly cited numbers are 16546-ED000 for the engine air filter (2.5L) and 27133-JA00A for the cabin air filter, with alternative numbers possible for other engines or trims. Always confirm using your VIN or by checking Nissan’s official parts database or with a dealership before purchasing. Regular replacement helps maintain engine performance and interior air quality.