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Make sure this part fits

Mercury F1AZ-6303-ARM Crankshaft Assembly

1993-2002 Mercury F1AZ6303ARM

Customer Questions & Expert Answers (2)
F1AZ-6303-ARM Ford Crankshaft Assembly Illustration 1 of 1
F1AZ-6303-ARM Ford Crankshaft Assembly Illustration 1 of 1
  • Part Description
    Crankshaft Assy
  • Base No.
    6303
  • Replaces
    F1AZ-6303-AARM
  • Manufacturer
    Ford
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A

  • Related Parts

    Shop for related parts for your vehicle

  • Product Specifications

    BrandGenuine Mercury
    Base No.6303
    Manufacturer Part NumberF1AZ-6303-ARM, F1AZ6303ARM
    Part DescriptionCrankshaft Assy
    Other NamesCrankshaft
    Item Dimensions6.3 x 6.1 x 24.2 inches
    ConditionRemanufactured
    Fitment TypeDirect Replacement
    ReplacesF1AZ-6303-AARM
    ManufacturerFord
    SKUF1AZ-6303-ARM
    WarrantyThis genuine Ford part is guaranteed by Ford's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65

  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    1995-1997 Mercury Cougar8 Cyl 4.6L4AT, 4AT 4R70W, 4AT AODE
    1993-2002 Mercury Grand Marquis8 Cyl 4.6L4AT, 4AT 4R70W, 4AT AODE

  • Customer Questions & Expert Answers

    Q:
    Is this the correct part for the attached VIN?
    A:
    You can Select Your Vehicle to check if F1AZ-6303-ARM fits your vehicle.
    Posted and answered by Ford Parts Specialist Matthew
    Q:
    How to install a Crankshaft on Lincoln Town Car? Posted by Girish K.
    A:
    Crankshaft installation is the first step in engine reassembly. The engine is flipped upside down, main bearing caps are removed, and new bearing inserts are placed. The crankshaft is carefully positioned and oil clearance is checked. The caps are installed and torqued in three steps. Grease is applied to the bearing surfaces and the crankshaft is placed back into the block. Crankshaft rotation and endplay are checked. For OHC engines, jack screws are used and the rear main oil seal is installed.
    You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist George / Jan 13, 2026

Genuine Ford Part F1AZ-6303-ARM, the Right Choice

To ensure reliability, purchase part # F1AZ-6303-ARM Crankshaft Assembly. It is also called Crankshaft. OEM parts are of high quality and known for their longevity. This is because they are built to the Ford standards which are relatively high and undergo rigorous quality control testing. This part fits specific Mercury Cougar, Grand Marquis models.

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