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Buick 1646478 Sensor Assembly

1988-1990 Buick

Customer Questions & Expert Answers (2)
1646478 GM Sensor Assembly
  • Part Description
    SENSOR, Electronic Brake Control
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine Buick
    Manufacturer Part Number1646478
    Part DescriptionSENSOR, Electronic Brake Control
    Other NamesABS Sensor, Rear Speed Sensor, Speed Sensor
    Item Dimensions7.6 x 6.0 x 2.1 inches
    Item Weight0.60 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU1646478
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    1988-1990 Buick Reatta6 Cyl 3.8L2 DOOR, CONVERTIBLE, REATTA, RIVIERA, T TYPE
    1988-1990 Buick Riviera6 Cyl 3.8L2 DOOR, CONVERTIBLE, REATTA, RIVIERA, T TYPE
  • Customer Questions & Expert Answers

    Q:
    I'm wondering if this is complete and correct part for my vehicle.
    A:
    You can Select Your Vehicle to check if 1646478 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    What specific steps should be taken for the 1989 Cadillac Eldorado regarding the Wheel Speed Sensor? Posted by Shalena S.
    A:
    Disengage the sensor cable grommet from the wheel well, remove the sensor cable from brackets, and take out the sensor mounting bolt to remove the sensor. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Fernando / Oct 08, 2025

Genuine GM Part 1646478, the Right Choice

To ensure reliability, purchase GM part # 1646478 Sensor Assembly. It is sometimes referred to as Buick ABS Sensor, Buick Wheel Speed Sensor. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Buick Reatta, Riviera models.

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