PRODUCT DETAILS
Honda R40 Front Main Seal - Genuine OEM (91212-R1B-A01)
Got a little oil weeping out the front of your K24, or a spot on the driveway you can't quite pin down? Before you blame a gasket, take a hard look at your front main seal. This one, Honda 91212-R1B-A01, is the genuine front crank seal for the R40 K24 engines, and it's the rubber ring that hugs the nose of your crankshaft and keeps your oil where it belongs. They don't last forever. The rubber goes hard, it loses its grip on the spinning crank, and pretty soon you're adding oil and wiping down the front of the motor every couple weeks. Pop a fresh one in and that headache's just gone.
This Is The Leak Everybody Misdiagnoses
Here's the thing about a front main leak, it's sneaky. Oil weeps out around the crank, then the spinning pulley slings it everywhere, so by the time you're under there you've got oil on the timing cover, oil on the pan rail, oil pretty much everywhere up front. So people chase the wrong thing. They throw a timing cover gasket at it, or an oil pan reseal, and the leak's still there because it was coming from this seal the whole time. If you've cleaned everything off and the oil keeps showing back up at the front of the crank, you've found it. And trust me, it doesn't get better on its own, it just keeps making a bigger mess.
If You're In There, Just Do It
Nobody pulls the front of an engine apart just for this seal, and you don't have to. You're usually in here for something bigger, a timing chain, a water pump, a rebuild on the stand, and that's exactly when you swap it. All the work is in the access. The seal costs next to nothing. So once you've got the crank pulley off and you're staring right at it, there's zero reason to put the old one back. Do it now, while it's right in front of you, and you're not kicking yourself a year later when it starts weeping again and you've gotta tear back in.
Get The Real Honda One
Don't cheap out on a seal. Sounds dramatic for a few-dollar part, but a seal's entire job is to be the right size and the right material, and that's exactly where the bargain ones miss. One that's a hair off or made from softer rubber can leak straight out of the box or go hard on you in a year, and now you're doing this whole dance over again. This is the genuine Honda seal, cut to the exact crank diameter and seat depth your engine wants, so it seals right and stays sealed. When the labor's the expensive part, you run the seal you can trust.
What You Get
- Genuine Honda front main (crankshaft) seal (91212-R1B-A01)
- Fits R40-block K24 series engines
- Seals the front of the crankshaft to stop oil leaks
- Direct OEM replacement, correct size and material
- Ideal for OEM replacement or engine rebuilds
- Sold individually
Fits These Cars
- 2013-2015 Acura ILX
- 2005-2012 Acura RDX
- 2005-2008 Acura TSX
- 2009-2014 Acura TSX
- 2006-2007 Honda Accord
- 2008-2012 Honda Accord
- 2014-2021 Honda Accord Hybrid
- 2022 Honda Accord
- 2005-2014 Honda CR-V
- 2020-2022 Honda CR-V Hybrid
- 2006-2015 Honda Civic Si
- 2012-2015 Honda Crosstour
- 2006-2011 Honda Element
- 2016-2022 Honda HR-V
Note: Genuine Honda front main crankshaft seal, part number 91212-R1B-A01, a direct replacement for the factory seal on R40-block K24 series engines. Seals the front of the crankshaft where it exits the block to prevent oil leaks. Made to factory size and material spec for correct fit and durability. Ideal for OEM replacement or engine rebuilds, and best installed while the front of the engine is already accessible for other timing or water pump work. Sold individually. Fits the 2013-2015 Acura ILX, 2005-2012 Acura RDX, 2005-2008 and 2009-2014 Acura TSX, 2006-2007, 2008-2012, and 2022 Honda Accord, 2014-2021 Honda Accord Hybrid, 2005-2014 Honda CR-V, 2020-2022 Honda CR-V Hybrid, 2006-2015 Honda Civic Si, 2012-2015 Honda Crosstour, 2006-2011 Honda Element, and 2016-2022 Honda HR-V. One seal per order.