2011 Nissan Sentra Owner's Manual - Page 304

AIR CLEANER WARNING ● Operating the engine with the air cleaner removed can cause you or others to be burned. The air cleaner not only cleans the air, it stops the flame if the engine backfires. If it isn't there, and the engine backfires, you could be burned. Do not drive with the air cleaner removed, and be careful when working on the engine with the air cleaner removed. ● Never pour fuel into the throttle body or attempt to start the engine with the air cleaner removed. Doing so could result in serious injury. LDI0710 WDI0596 MR20DE The air cleaner filter should not be cleaned and reused. Replace it according to the maintenance log shown in the "NISSAN Service and Maintenance Guide." To remove the air cleaner filter: 1. Unlatch the clips and move the air cleaner cover upward. 2. Remove the air cleaner filter. ● For the MR20DE, release the 2 retaining clips A and pull the unit upward. ● For the QR25DE, push the tabs A and pull the unit upward B . QR25DE 3. Wipe the inside of the air cleaner filter housing and the cover with a damp cloth. NOTE: After installing a new air cleaner, make sure the air cleaner cover is seated in the housing and latch the clips. IN-CABIN MICROFILTER The in-cabin microfilter restricts the entry of airborne dust and pollen particles and reduces some objectionable outside odors. The filter is located behind the trim panel near the accelerator pedal. Refer to the "NISSAN Service and Maintenance Guide" for change intervals. If replacement is required, see your NISSAN dealer. Maintenance and do-it-yourself 8-19