# Service bulletin 24KWD

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.

- Type: Service bulletin
- NHTSA id: 10254164
- Published by NHTSA: 2024\-05\-04
- Manufacturer's number: 24KWD
- Manufacturer's date: 2024\-04\-09
- NHTSA component: SERVICE BRAKES, AIR

## NHTSA's summary

Certain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air volume requirements per FMVSS/CMVSS 121 “Air Brake Systems”. This bulletin will be updated when repair parts and procedures are available.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10254164-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10254164-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes

## Vehicles listed

- 2009 to 2024 KENWORTH C500
- 2011 KENWORTH T400
- 2013 to 2015 KENWORTH T400
- 2009 to 2023 KENWORTH T470
- 2009 to 2020 KENWORTH T660
- 2011 to 2024 KENWORTH T680
- 2009 to 2020 KENWORTH T800
- 2024 KENWORTH T800
- 2021 to 2023 KENWORTH T800B
- 2011 to 2024 KENWORTH T880
- 2009 to 2024 KENWORTH W900

## Recalls for the same vehicles and component

- [2024744](/recalls/tc/2024744.md), 2024-12-09: Brakes
- [24V915000](/recalls/nhtsa/24V915000.md), 2024-12-09: ELECTRICAL SYSTEM:SOFTWARE; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE
- [2024121](/recalls/tc/2024121.md), 2024-02-23: Brakes
- [24V145000](/recalls/nhtsa/24V145000.md), 2024-02-23: SERVICE BRAKES, AIR:SUPPLY:RESERVOIR/TANK
- [2023007](/recalls/tc/2023007.md), 2023-01-17: Brakes
- [2021713](/recalls/tc/2021713.md), 2021-11-19: Brakes
- [21V906000](/recalls/nhtsa/21V906000.md), 2021-11-19: ELECTRICAL SYSTEM:SOFTWARE; SERVICE BRAKES, AIR
- [2020461](/recalls/tc/2020461.md), 2020-09-29: Brakes
- [20V593000](/recalls/nhtsa/20V593000.md), 2020-09-28: SERVICE BRAKES, AIR:ANTILOCK
- [20V199000](/recalls/nhtsa/20V199000.md), 2020-04-06: SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT; ELECTRONIC STABILITY CONTROL \(ESC\)

## Other bulletins for the same vehicles and component

- [24KWE/24PBE](/bulletins/11027065.md), 2026-01-06, Emissions: SERVICE BRAKES. The parts section has been updated for clarity. The right\-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector. Loss of communication between the right\-hand shift stalk and the vehicle may result in the vehicle being disabled after it comes to a stop, thereby increasing the risk of crash or injury. A warning will appear on the dash display when communication is lost, including transmission or engine warnings, “\!” next to DNR/DNRP indicator, “\-“ in the DNR/DNRP indicator, and/or chimes, depending upon whether you are operating a diesel/gas or battery electric vehicle.
- [24KWD](/bulletins/11024956.md), 2025-11-05, Service bulletin: SERVICE BRAKES. SAFETY RECALL Additional chassis have been included. The chassis list has been updated. Certain T370 / T440 / T470 / T480 / T660 / T680 / T800 / T880 / W900 / C500 chassis may be equipped with air tank reservoirs that have less than twelve times the combined volume of all service brake chambers which fail to conform to Federal Motor Vehicle Safety Standard \(FMVSS\) No.121, Air Brake Systems.
- [13\-059](/bulletins/10208772.md), 2022-03-04, Service bulletin: PARKING BRAKE; ELECTRICAL SYSTEM. On certain Model Year 2023 chassis with manual transmissions, the optional “Audible Alarm when Door is Open and Park Brake is not set” feature operates incorrectly due to a software issue. The software will be corrected when available
- [13\-054](/bulletins/10177935.md), 2020-08-05, Service bulletin: SERVICE BRAKES. Fix\-As\-Fail \- Bendix New\-Gen Lightweight Steer Axle Drum Brake Spider Cracking
- [36\-005](/bulletins/10171021.md), 2020-02-05, Service bulletin: VEHICLE SPEED CONTROL; SERVICE BRAKES. Information Only \- Driver Performance Assistance \(DPA\) Coasting and Braking Scores Not Incrementing, Stays at 50%. The average score will never change nor create driver assistance popups based upon driver’s actions. A future software update will resolve the issue. This bulletin will be updated when the software update becomes available.
- [44\-029](/bulletins/10136234.md), 2018-05-07, Service bulletin: FUEL SYSTEM, OTHER:FUEL FILTER; ENGINE AND ENGINE COOLING; SERVICE BRAKES, AIR:DISC:CHAMBER. Non\-Safety Campaign \- The coolant lines connected to the fuel filter may interfere with the brake chamber on certain T680/T880 vehicles. Repeated interference may cause the fittings to break and leak coolant.
- [13\-048](/bulletins/10136233.md), 2018-05-07, Service bulletin: SERVICE BRAKES; ENGINE. Fix\-As\-Fail ? Repair procedure for DTCs U1120 and/or U17C5 with WABCO Q27\-6075\-130 ABS ECU.

JSON: [/v1/bulletins/10254164](/v1/bulletins/10254164)

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