Menu
×
Search Bar
Search by Part Number, Part Name, or Vehicle
My Garage
Cart
Contact Us Help Center
Make sure this part fits

Mercury 1L2Z-4204-BA Differential Case

2002-2006 Mercury 1L2Z4204BA

Customer Questions & Expert Answers (3)
1L2Z-4204-BA Ford Differential Case Product Photo 1 of 4
1L2Z-4204-BA Ford Differential Case Product Photo 1 of 4
1L2Z-4204-BA Ford Differential Case Product Photo 2 of 4
1L2Z-4204-BA Ford Differential Case Product Photo 3 of 4
1L2Z-4204-BA Ford Differential Case Product Photo 4 of 4
1L2Z-4204-BA Ford Differential Case Illustration 1 of 1
  • Part Description
    Case - Differential
  • Base No.
    4204
  • Replaced By
    9L3Z-4204-B
  • Manufacturer
    Ford
Make sure this part fits
$128.82 MSRP: $173.85
You Save: $45.03 (26%)
Ships in 1-3 Business Days
1
ADD TO CART
  • Related Parts
  • Specifications
  • Fitment
  • Q&A

  • Related Parts

    Shop for related parts for your vehicle

  • Product Specifications

    BrandGenuine Mercury
    Base No.4204
    Manufacturer Part Number1L2Z-4204-BA, 1L2Z4204BA
    Part DescriptionDifferential Case; Case - Differential
    Item Dimensions10.3 x 10.1 x 9.3 inches
    Item Weight13.60 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerFord
    SKU1L2Z-4204-BA
    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
    2005-2006 Mercury Grand Marquis8 Cyl 4.6L4AT 4R70W
    2002-2005 Mercury Mountaineer6 Cyl 4.0L SOHC EFI, 8 Cyl 4.6L Romeo 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:
    Does the PN fit my vehicle?
    A:
    You can Select Your Vehicle to check if 1L2Z-4204-BA fits your vehicle.
    Posted and answered by Ford Parts Specialist Sonny
    Q:
    What additional steps are required for the Differential in the 2004 Ford Expedition? Posted by Earl A.
    A:
    For these models, additional steps include removing the rear driveshaft and driveaxles, spare tire, differential vent hose, and vehicle speed sensor connector. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist Clayton / Feb 25, 2026
    Q:
    3.23" differential for a 2011 Ford Crown Victoria Posted by Mohammed M. / 2011 Ford Crown Victoria
    A:
    THE 4204 I SHOW FOR THIS VIN IS 9L3Z4204A
    Answered by Ford Parts Specialist Clayton / May 20, 2025

Genuine Ford Part 1L2Z-4204-BA, the Right Choice

To ensure reliability, purchase part # 1L2Z-4204-BA Differential Case. It is also called Differential. 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 Grand Marquis, Mountaineer models.

FordPartsGiant.com is a leading supplier of genuine components and accessories such as 1L2Z4204BA Differential Case. Looking to purchase quality low-cost OEM Ford parts? You have just found the right place. For detailed Mercury parts information, click here.
FordPartsGiant.com puts satisfaction first with dedicated service, prompt delivery, and the best deals on genuine OE parts.