2021 BMW M Vehicle Compound Brake System Cracks
NHTSA Manufacturer Communication 10194298 details that visible cracks in the compound brake discs of 2021 BMW M vehicles, such as the 2021 BMW X3, are caused by high thermal stresses. This occurs during rapid heating and cooling, especially when braking from high speeds with cold brake components.
Also applies to
- BMW 230i
- 2021
- BMW 430i
- 2021
- BMW 530e
- 2021
- BMW 530i
- 2021
- BMW 540i
- 2021
- BMW 740i
- 2021
- BMW 840i
- 2021
- BMW M2
- 2021
- BMW M240i
- 2021
- BMW M440i
- 2021
- BMW M5
- 2021
- BMW M550i
- 2021
- BMW M760i
- 2021
- BMW M8
- 2021
- BMW M850i
- 2021
- BMW X4
- 2021
- BMW X5
- 2021
- BMW X6
- 2021
- BMW X7
- 2021
- BMW Z4
- 2021
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Owners of 2021 BMW M vehicles, including the 2021 BMW X3, may experience concerns regarding visible cracks on their compound brake discs. This issue, highlighted in NHTSA Manufacturer Communication 10194298, provides insight into the diagnostic considerations for such complaints. This 2021 BMW X3 manufacturer_communication explains the underlying causes of these brake disc cracks.
Understanding Compound Brake System Cracks
The primary cause of visible cracks in the compound brake discs of BMW M vehicles is attributed to high thermal stresses. These stresses occur during the rapid heating and cooling cycles that brake components undergo during operation. Specifically, the communication notes that braking from high speeds when the brake components are cold (less than 212 degrees F) significantly increases the likelihood of these cracks forming.
The compound brake system is designed for high performance, and its components are subjected to extreme conditions. The material properties of the brake discs react to these rapid temperature changes, leading to the development of surface cracks. This diagnostic information helps technicians understand the conditions that contribute to the issue.
What Owners Should Know
If you own a 2021 BMW M vehicle, such as a 2021 BMW X3, and observe cracks on your brake discs, it's important to understand the contributing factors. The 2021 BMW X3 manufacturer_communication indicates that these cracks are often a result of specific driving conditions involving rapid temperature fluctuations. While the communication doesn't outline a specific repair, it provides valuable diagnostic context for dealers.
It is advisable to consult with a certified BMW service center for a professional assessment if you have concerns about your vehicle's compound brake system. They can evaluate the condition of your brake discs and advise on any necessary actions based on the manufacturer's guidelines.
Source: NHTSA Manufacturer Communication 10194298
Frequently Asked Questions
- What causes cracks in 2021 BMW M vehicle brake discs?
- Visible cracks in the compound brake discs of 2021 BMW M vehicles are caused by high thermal stresses from rapid heating and cooling, especially when braking from high speeds with cold brake components (below 212 degrees F), as per NHTSA Manufacturer Communication 10194298.
- Should I be concerned about brake disc cracks on my 2021 BMW X3?
- If you observe cracks on your 2021 BMW X3's compound brake discs, it's important to understand that they can be caused by specific driving conditions. It is recommended to have your vehicle inspected by a certified BMW service center for a professional assessment.
What BMW X3 owners report
Counted from the records in our database across 23 model years.
- 2,295
- Owner complaints
- 64
- Recalls
- 1,126
- Service bulletins
- 114
- Crashes reported
- 133
- Fires reported
- 118
- Injuries reported
The 2021 model year
113 complaints, the 8th most of 23 model years on file. Owners reported 5 crashes, 2 fires and 2 injuries for this year, which also has 10 recalls on file.
Equipment Adaptive/Mobility and Equipment and Service Brakes and Air, the system this article covers, accounts for 130 of 2,295 complaints (6%), including 6 for 2021.
Complaints by model year
| 2004 | 138 | |
|---|---|---|
| 2006 | 143 | |
| 2007 | 258 | |
| 2008 | 122 | |
| 2011 | 126 | |
| 2013 | 226 | |
| 2015 | 105 | |
| 2019 | 171 | |
| 2020 | 110 | |
| 2021 | 113 |
Most-reported systems
- Engine — 494
- Electrical System — 450
- Air Bags — 404
- Power Train — 247
- Seats — 218
Latest recalls for the 2021 model year
- 26V056000 — Electrical System (Jan 2026)
- 25V636000 — Electrical System (Sep 2025) — Park outside
- 24V764000 — Structure (Oct 2024)
Recent owner reports about equipment adaptive/mobility and equipment and service brakes and air
The contact owned a 2021 BMW X3. The contact stated while parked and occupied in the vehicle, while shifting the gear shift into park, the vehicle accelerated independently and collided with a Tesla occupied by a mom and daughter, which was in front of her.
Read owner complaints →Vehicle has consistently presented with a loud screeching noise from the brakes. When emergency braking needed, there are incidents of a slipping feel to the brakes where they do not seem as through they are applying properly.
Complaints are owner reports filed with NHTSA. They are unverified, and counts depend on how many vehicles were sold, so they are not a failure rate.
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