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Mercury 4L2Z-6100-AA Piston And Connecting Rod Assembly

2002-2005 Mercury Mountaineer 4L2Z6100AA

Customer Questions & Expert Answers (3)
4L2Z-6100-AA Ford Piston And Connecting Rod Assembly
4L2Z-6100-AA Ford Piston And Connecting Rod Assembly
  • Part Description
    Piston And Connecting Rod Assy
  • Base No.
    6100
  • 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.6100
    Manufacturer Part Number4L2Z-6100-AA, 4L2Z6100AA
    Part DescriptionPiston And Connecting Rod Assy
    ConditionNew
    Fitment TypeDirect Replacement
    Require Quantity6
    ManufacturerFord
    SKU4L2Z-6100-AA
    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
    2002-2005 Mercury Mountaineer6 Cyl 4.0L SOHC EFI5-Speed Automatic Transmission 5R55S, 5-Speed Automatic Transmission 5R55W, 5-Speed Manual Transmission (M5R4), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Right Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)

  • Customer Questions & Expert Answers

    Q:
    Is this the correct part for the attached VIN?
    A:
    You can Select Your Vehicle to check if 4L2Z-6100-AA fits your vehicle.
    Posted and answered by Ford Parts Specialist Matthew
    Q:
    What should be done if the oil squirt hole is facing the wrong way for the Piston in the 2007 Ford Ranger? Posted by Hosam A.
    A:
    If the oil squirt hole faces the wrong way when the arrow on the piston points toward the front, the rod and piston have been assembled incorrectly and must be corrected before proceeding. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist Sonny / Apr 30, 2026
    Q:
    What should I do to remove the connecting rod/Piston assembly for the 2004 Ford Ranger? Posted by Asked S.
    A:
    Remove the bearing insert and push the connecting rod/piston assembly out through the top of the engine using a wooden hammer handle to push on the upper bearing surface in the connecting rod. If resistance is felt, double-check to ensure that all of the ridge was removed from the cylinder. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist Joseph / Dec 05, 2023

Genuine Ford Part 4L2Z-6100-AA, the Right Choice

To ensure reliability, purchase part # 4L2Z-6100-AA Piston And Connecting Rod Assembly. It is also called Piston. 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 Mountaineer models.

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