✓- Direct replacement for Nissan and Infiniti 11026-4N200, also written 110264N200, superseding 11026-EN10A. Dimensions are 18mm or 0.71in inner diameter, 24mm or 0.94in outer diameter and 1.5mm or 0.06in thickness, machined from aluminum. Nissan catalogues the same part as drain plug gasket, automatic transmission drain plug gasket and gasket-plug, so all three names point here.
✓- Seals the rear differential drain and fill plugs on rear-drive and all-wheel-drive Infiniti models, and the reduction gear housing on the Nissan LEAF. A differential service takes two washers, one on the drain plug and one on the fill plug, so a pack of fifteen covers seven complete services instead of a trip to the parts counter for a two dollar gasket every time the fluid is due.
✓- Aluminum is softer than the plug and the housing, so it deforms under torque and takes on the surface texture of both, and that deformation is what forms the seal against gear oil and vibration. Once flattened the washer will not return to shape, which is why a reused one starts weeping within a day of the service and tempts you to over-torque the plug, damaging aluminum threads.
✓- Fits Infiniti EX35 2008-2012, EX37 2013, FX35 2009-2012, FX37 2013, FX50 2009-2013, G25 2011-2012, G35 2003-2007, G37 2008-2013, M35 2006-2010, M35h 2012-2013, M37 2011-2013, M45 2006-2010, M56 2011-2013, Q40 2015, Q50 2014-2024, Q60 2014-2022, Q70 2014-2019, Q70L 2015-2019, QX50 2014-2025, QX70 2014-2017 and QX80 2015-2024, plus Nissan 350Z 2003-2009 and LEAF 2011-2012 on engines from the 2.0L four to the 5.6L V8.
✓- Fitting takes a minute with no special tools. Drain the fluid, pull the plug, lift the old washer off with a pick or a small screwdriver, wipe the plug and the housing face clean, drop the fresh washer onto the plug and torque to the figure in your service manual. Compare the old washer against the numbers and the dimensions above before ordering, since Nissan uses several sizes across the range.