Product Description
New National extension housing seal (MPN: SX-FF87). Designed as a direct replacement for automatic transmission extension housing on Mercedes‑Benz S420 models from 1996 through 1999. Supplied as a single piece. Interchange references include Timken, SKF, C171, VEMO, and King 17-29.
Product Specifications
BrandNational
TypeAutomatic Transmission Extension Housing Seal
Manufacturer Part NumberSX-FF87 1999 1998 1997 1996 Automatic
Manufacturer Warranty1 Year
Interchange Part NumberTimken SKF C171 VEMO King 17-29
Placement on VehicleTransmission > Gaskets Sealing Systems
Compatible MakeMercedes-Benz
Compatible ModelS420
Compatible Year1999 1998 1997 1996
Core ChargeFree - No Core Charge
Fitment TypeDirect Replacement
Bundle Description1 pc National Extension Housing Seal
UPCDoes not apply
Country of OriginUnited States
Placement on VehicleTransmission > Gaskets Sealing Systems
Interchange Part NumberTimken SKF C171 VEMO King 17-29
Core ChargeFree - No Core Charge
Fitment TypeDirect Replacement
Bundle Description1 pc National Extension Housing Seal
UPCDoes not apply
Country of OriginUnited States
Vehicle Fitment
Always compare the part number and listed specifications with your original part before ordering.