Zf North America Brake Chamber, model year 9999. Filed by Nova Bus (US) Inc. and reported to NHTSA on 14 April 2025. 2,090 vehicles potentially affected.
What the notice says Nova Bus (US) Inc. (Nova Bus) is recalling certain ZF North America Knorr-Bresme 20/22-57 brake chambers, with part number K038830N00, sold as replacement parts for certain buses. The brake chamber may have been improperly manufactured, which can result in an air leak.
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.
Nova Bus's own number for this recall: CR5720. That is the number on the owner letter and on the dealer paperwork. 25E027 is the number NHTSA gave the same campaign, and the number this page is filed under. They are one recall, written two ways.
What owners ask about this recall
- Which vehicles does recall 25E027 cover?
- ZF North America Brake Chamber.
- What is wrong with them?
- Nova Bus (US) Inc. (Nova Bus) is recalling certain ZF North America Knorr-Bresme 20/22-57 brake chambers, with part number K038830N00, sold as replacement parts for certain buses. The brake chamber may have been improperly manufactured, which can result in an air leak.
- What can happen if it is not put right?
- A brake chamber air leak may cause the brakes to engage unexpectedly, which can overheat the brakes and increase the risk of a fire. Additionally, unexpected braking can increase the risk of a crash.
- Is there a fix yet?
- Yes, and it is free. Nova Bus will replace the brake chambers, free of charge. Owner notification letters were mailed August 21, 2025. Owners may contact Nova Bus customer service at 1-450-472-6410. Nova Bus's number for this recall is CR5720.
- What should I do now?
- Check your own vehicle by its VIN with NHTSA, which is the record to act on. Nova Bus calls this recall CR5720, which is the number on the owner letter and the dealer paperwork.
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: “A brake chamber air leak may cause the brakes to engage unexpectedly, which can overheat the brakes and increase the risk of a fire. Additionally, unexpected braking can increase the risk of a crash.”
affected
in the notice
caught
| Campaign | 25E027 |
|---|---|
| Filed by | Nova Bus (US) Inc. |
| System at fault | Service Brakes, Air:Disc:Chamber |
| Reported to NHTSA | 14 April 2025 |
| Model years | 9999-9999 |
| Vehicles named | ZF NORTH AMERICA BRAKE CHAMBER |
What the notice says today
The consequence
A brake chamber air leak may cause the brakes to engage unexpectedly, which can overheat the brakes and increase the risk of a fire. Additionally, unexpected braking can increase the risk of a crash.
The remedy
Nova Bus will replace the brake chambers, free of charge. Owner notification letters were mailed August 21, 2025. Owners may contact Nova Bus customer service at 1-450-472-6410. Nova Bus's number for this recall is CR5720.
What it said before
This campaign is in the register but not yet in the dated wording archive, so we cannot yet say whether its text has moved. It enters the archive on the next pass.
This is one of 353 notices in the record whose component field names service brakes, air. Across that group the median wait before owners were written to was 43 days.
Last checked . No change has been recorded in the wording.
How to cite this record
Quoting the wording on this page means quoting a version, so the date belongs in the citation:
CarsMultiverse, recall 25E027, wording as read on 17 September 2026. https://carsmultiverse.com/recall/25e027/
The cross-border matches used on this site are deposited as a citable dataset: doi:10.5281/zenodo.22087136. The recall wording itself is published by the national authority named above and is theirs, not ours.
The recall record and its wording are published by the US National Highway Traffic Safety Administration and are US Government public domain. The dated archive, the comparison and any before-and-after above are CarsMultiverse. How fresh every engine behind this page is, is public on the status page. To check a specific vehicle, use NHTSA’s own VIN lookup.
Other Nova Bus notices we hold
- 26V355: 1997-2002, 2005-2024 LFS, 2009-2014, and 2016 - 2024 LFS Artic transit buses
- 26V300: 2019-2020 LFS Artic and 2019-2023 LFS transit buses
- 26V275: 2022-2023 LFS transit buses
- 26V206: 2025 LFS and 2024 LFS Artic transit buses
- 26V182: 2016-2018, 2020, 2022-2023 LFS and 2019-2020 LFS Artic transit buses
- 26V077: 2013-2019 LFS and 2019-2020 LFS Artic transit buses equipped with Double Transversal seats
- 26E019: Ricon hidden frame windows sold through Prevost Parts and Prevost Service Center
- 25V822: 2021 and 2024-2025 LFS transit buses
All 94 Nova Bus campaigns we hold · Every manufacturer in the record
The fingerprint of this notice
We take a SHA-256 of each of the three blocks of text the authority publishes and keep the first eight characters. As we last read campaign 25E027 on 5 September 2026, they were:
- Defect summary
0f8028a7 - Consequence
be19d699 - Remedy
a2c63db7
We first read this notice on 21 August 2026. It has not moved since. If it ever does, these characters will not match, and the change will be dated here.
The wording we hold for 25E027 · how the whole register is watched
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