{
  "owners": null,
  "title": "Mack recall 21V684 (SC0429): 2020-2022 Mack MD",
  "url": "https://carsmultiverse.com/recall/21v684/",
  "summary": "Recall 21V684 (Mack): An unsecured brake pedal can cause a loss of braking ability and increase the risk of a crash. Mack's own number: SC0429.",
  "excerpt": "Mack Md, model years 2020 to 2022. Filed by Mack Trucks, Inc. and reported to NHTSA on 1 September 2021. 2,823 vehicles potentially affected. What the notice says 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. Is your vehicle included? Check with your VIN at NHTSA , or ask a dealer. This page is an independent copy of the notice, kept so you can see what changed after it was published. It is not the authority, and the authority’s own text is the one to act on. CarsMultiverse / Recalls Mack's own number for this recall: SC0429. That is the number on the owner letter and on the dealer paperwork. 21V684 is the number NHTSA gave the same campaign, and the number this page is filed under. They are one recall, written two ways. Answered from the register this site holds. NHTSA is the record to act on. What the authority says can happen if this is not fixed: “An unsecured brake pedal can cause a loss of braking ability and increase the risk of a crash.” 21V684 Mack Trucks, Inc. Service Brakes, Hydraulic:Pedals And Linkages 1 September 2021 2020-2022 MACK MD This is not an ordinary campaign. Owners are told not to drive the vehicle at all . NHTSA applies this to a small minority of campaigns. 28 of the 1,399 we currently hold. An unsecured brake pedal can cause a loss of braking ability and increase the risk of a crash",
  "register": {
    "authority": "NHTSA",
    "country": "United States",
    "index": "https://carsmultiverse.com/changed/"
  },
  "datePublished": "2026-08-23T22:02:36+00:00",
  "dateModified": "2026-09-16T19:52:26+00:00",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "citation": "CarsMultiverse, \"Mack recall 21V684 (SC0429): 2020-2022 Mack MD\", https://carsmultiverse.com/recall/21v684/, licensed CC BY 4.0.",
  "note": "CarsMultiverse is an independent record, not a safety authority. To act on a recall, use the official register."
}