

Rear Main Seal Gasket for 2003-2023 Toyota 4Runner, 2005-2015 Tacoma, 2005-2014 Tundra, 2007-2014 FJ Cruiser 4.0L V6
Fel-Pro BS40686 is a rear main seal gasket kit for repairing oil leaks at the back of the crankshaft on 4.0L V6 Toyota truck and SUV engines. It is built for Toyota 4Runner, Tacoma, Tundra, and FJ Cruiser applications covered by the catalog data, giving technicians and DIY owners an application-specific sealing solution for rear main seal service without guessing at universal parts.
Fel-Pro BS40686 Features:
- Nitrile rubber gasket material helps resist engine oil exposure while staying flexible enough for the sealing demands of the rear crankshaft area.
- Application-specific design is validated for fit, form, and function, supporting a precise seal on the Toyota 4.0L V6 applications listed for this part.
- Engine crankshaft seal kit is intended for rear main seal replacement during leak repair, engine resealing, or service work that exposes the rear of the crankshaft.
- Package dimensions are 12 in. x 6 in. x .44 in., with a listed weight of .03 lb for easy storage in a shop seal and gasket inventory.
- Meets or exceeds OEM specifications according to the supplied product data, helping restore the intended oil seal at the rear main journal.
Includes:
- Rear main seal set for the crankshaft rear sealing location
Commonly used when replacing a leaking rear main seal or resealing the engine during transmission removal. Inspect the crankshaft sealing surface and related hardware during service, since damaged mating surfaces can affect any new seal.
Fits 4.0L V6 Toyota 4Runner applications from 2003 through 2023, Tacoma from 2005 through 2015, Tundra from 2005 through 2014, and FJ Cruiser from 2007 through 2014. Confirm engine size and catalog fitment before installation.