PRODUCT DETAILS
This is the genuine Honda OEM rear main seal (part number 91214-RNB-A01) for K-series and a wide range of Honda and Acura engines. If you are doing an engine rebuild, a clutch swap, or tracking down a crankshaft oil leak, this is the exact seal Honda installs at the factory - same material, same dimensions (80x98x10mm), same fitment tolerance. No aftermarket guessing on lip hardness or seal diameter.
The rear main seal sits between the crankshaft and the transmission bellhousing. It is one of the most common sources of oil leaks on high-mileage K20 and K24 engines, and it is a part you only want to install once. Using genuine Honda OEM ensures the rubber compound and spring tension match the crankshaft journal spec exactly.
Trusted by K-series builders doing everything from daily-driver refreshes to full engine rebuilds. Stock this alongside your clutch kit, OEM crankshaft, or engine rebuild gasket set - replacing the rear main seal at the same time as any major bottom-end work is standard practice and saves you from pulling the transmission a second time.
- Genuine Honda OEM - not aftermarket, not rebranded
- Part number: 91214-RNB-A01
- Dimensions: 80x98x10mm (Arai)
- Fits K20, K24, and a wide range of other Honda and Acura engines (see full fitment list below)
- Direct factory replacement - no modification required
- Recommended any time the transmission or engine is removed
Compatible Vehicles
- 2013-2015 Acura ILX (K24Z7)
- 2002-2006 Acura RSX (K20A2, K20Z1)
- 2004-2008 Acura TSX (K24A2)
- 1996-1998 Acura TL (C32A)
- 1996-2004 Acura RL (C35A)
- 1991-2005 Acura NSX (C30A, C32B)
- 1986-1995 Acura Legend (C27A)
- 2003-2007 Honda Accord (K24A4, K24A8)
- 1995-1997 Honda Accord EX / LX
- 2002-2005 Honda Civic Si (K20A3, K20Z1)
- 2006-2011 Honda Civic (Non-Si, R18)
- 2012-2015 Honda Civic (Non-Si)
- 2002-2006 Honda CR-V (K24A1)
- 2003-2011 Honda Element (K24A4)
- 2007-2014 Honda Fit
- 2016-2020 Honda HR-V
Note: Always verify your engine code before ordering. This seal fits multiple Honda engine families. If you are unsure whether this seal fits your specific build or engine swap, match part number 91214-RNB-A01 against your factory Honda parts catalog or contact us before ordering.
| Part Number | 91214-RNB-A01 |
|---|---|
| OEM Brand | Honda / Arai |
| Seal Type | Rear Main Crankshaft Seal |
| Outer Diameter | 98mm |
| Inner Diameter | 80mm |
| Width / Thickness | 10mm |
| Dimensions (ID x OD x W) | 80 x 98 x 10mm |
| Manufacturer | Arai (Honda OEM supplier) |
| Application | Crankshaft rear journal seal (transmission side) |
| Fitment Type | Direct OEM replacement - no modification |
| Recommended Service Interval | Replace whenever transmission or engine is removed |
- 1x Honda OEM Rear Main Seal (91214-RNB-A01)
Sold individually. This listing is for the seal only. Gaskets, installation tools, and other components sold separately.