Hearth Record

Service brakes, hydraulic: pedals and linkages (Mack)

Vehicle recall 21V-684. NHTSA received Mack Trucks, Inc.’s report on Sep 1, 2021.

  • NHTSA: do not drive
NHTSA’s own record, on nhtsa.gov

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The short answer

NHTSA received Mack Trucks, Inc.’s report on Sep 1, 2021. Copied from NHTSA on Oct 21, 2026.

Every line below is in NHTSA’s own words, with its source beside it.

What’s wrong with it?

An unsecured brake pedal can cause a loss of braking ability and increase the risk of a crash.

Mack Trucks, Inc.

(Mack) is recalling certain 2020-2022 Mack MD vehicles.

The cotter pin that retains the brake pedal clevis pin may not have been properly installed, which could result in an unsecured brake pedal.

Source:

NHTSA, Recalls flat file. Released Oct 21, 2026. Updated daily.

  • NHTSA’s part: Service brakes, hydraulic: pedals and linkages.

What should you do?

Owners are advised to not drive their vehicles until the remedy has been performed. Dealers will inspect the cotter pin installation and repair it as necessary, free of charge. Owner notification letters were mailed on September 13, 2021. Owners may contact Mack’s customer service at 1-800-866-1177. Mack’s number for this recall is SC0429.

NHTSA’s advice: Do not drive

Source:

NHTSA, Recalls flat file. Released Oct 21, 2026. Updated daily.

  • How to reach the firm: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
  • Check a vehicle by its VIN at NHTSA: the recalls still open on it are listed there.

Which ones are recalled?

NHTSA counts 2,823 vehicles potentially involved, across everything this recall names.

Each model year opens its own page: every recall naming it, its owner complaints and its crash ratings.

Source:

NHTSA, Recalls flat file. Released Oct 21, 2026. Updated daily.

Who is recalling it?

  • Made by Mack Trucks, Inc..
Source:

NHTSA, Recalls flat file. Released Oct 21, 2026. Updated daily.

What the record doesn’t say

  • NHTSA’s recall file doesn’t say whether anyone was hurt. Owners’ complaints are counted on each vehicle’s page.
  • Whether one vehicle or seat has been fixed: only its maker, or NHTSA’s lookup with a VIN, can say.
  • How many have been returned or fixed isn’t in the notice.
Source:

Hearth Record wrote these lines.

Sources

  • National Highway Traffic Safety Administration, Recalls flat file (FLAT_RCL_POST_2010).

    Released Oct 21, 2026 and checked Oct 21, 2026. Updated daily. Public domain (U.S. Government work).

Source:

Vehicle, car seat, tire and vehicle equipment recalls, owner complaints and crash ratings are from the National Highway Traffic Safety Administration (NHTSA). Copied on Oct 21, 2026.

How to read a record

Four things every record does, shown on an example record made up for this guide.

An example record, made up for this guide

An example nursing home

Made up for this guide: no real place is shown

Not fully inspected in over two years (CMS flag)

11 health citations at the latest inspection cycle

The state average is 14.3.

Source:

CMS, State and US Averages and Health Deficiencies. Released Oct 28, 2026. Updated monthly.

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Every fact names its source.

Who published it, when, and how often it changes sit beside each fact, with a link to the agency’s own file.

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