Service bulletins for the 2021 Mack LR
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
163 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Brakes are shown. Show all
| CBR 407 072025 | 2025-08-04. Service bulletin. SERVICE BRAKES; ELECTRICAL SYSTEM. CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded. |
|---|---|
| CBR-407 202409 | 2024-10-03. Service bulletin. SERVICE BRAKES. CBR: To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP fi le will need to be downloaded. |
| KC-2012-Ver3 | 2023-06-05. Service bulletin. SERVICE BRAKES. CBR: SNM 20-005 - HD Disc Brake Rotor Upgrade |
| KC-2140 | 2022-12-05. Service bulletin. ELECTRICAL SYSTEM; PARKING BRAKE. Mack Chassis - P05E662 Park brake Sensor/Switch Circuit Range/Performance, Signal Compare failure - Diagnostic Instructions - US21+OBD21 Emissions |
| KC-417 | 2022-02-04. Service bulletin. SERVICE BRAKES, AIR. Mack Chassis - Air System Schematics For Models - MRU, LEU And ( LR ) Using The Same Schematic As the LEU |
| KC-286 | 2022-01-06. Service bulletin. SERVICE BRAKES, AIR; UNKNOWN OR OTHER. Mack Chassis - FSB 563-008 Plugs, Pressure Protection Manifold - New Brass Plugs For Noregon Pressure Protection Manifold (PPM) |
| S7610 | 2021-11-05. Service bulletin. SERVICE BRAKES, AIR; SERVICE BRAKES, AIR:SLACK ADJUSTERS; SUSPENSION:SUBFRAME/MOUNTING BRACKET. Bump Stop Interference with Brake Slack |
| FSB 511-010 | 2021-05-04. Service bulletin. SERVICE BRAKES, AIR. Disc Brake Rotor, Replacement |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.