Xiaomi Explains Brake Fires in Its New SUVs: "A Normal Phenomenon Under Extreme Use"

Xiaomi is experiencing remarkable growth in the electric vehicle market, especially after the impressive success of its YU7 SUV, which received over 289,000 reservations within just one hour. However, this period has not been without challenges, the latest being a brake fire incident involving the YU7 Max during a racetrack test, sparking widespread debate about the vehicle’s safety.

What Exactly Happened?

During a track test, the brakes of a Xiaomi YU7 Max caught fire as the brake disc temperature soared above 600°C (1112°F). A video of the incident showed flames rising from the brake caliper while technicians measured the temperature reaching 619°C, a heat close to the melting point of aluminum.

Xiaomi’s Explanation of the Incident

Xiaomi issued a statement clarifying that the brake fire was due to the organic materials in the low-metallic brake pads, which can ignite when temperatures exceed 600°C—a “normal” occurrence under extreme conditions such as racetrack testing.

The company added that during the test, the vehicle was not using its regenerative braking system, which reduces the load on the friction brakes. Instead, it relied entirely on traditional brakes, causing the temperature to rise significantly.

The Importance of Regenerative Braking

The YU7 Max features a “Master Mode” with “Enhanced Energy Recovery,” allowing up to 0.2G of braking force through the electric motor, which reduces the strain on the friction brakes and lowers the chance of overheating.

In this test, the system was not engaged, resulting in excessive load on the brakes and ultimately the fire.

Difference Between This Brake Fire and Previous Incidents

Xiaomi emphasized that this fire differs from past brake failures in some SU7 vehicles late last year, which were caused by faulty brake components not designed for track use, leading to serious accidents.

In the YU7 Max case, the brake pads and discs are designed to withstand harsh driving conditions, and the fire is a natural outcome of extreme heat during rigorous testing.

Reactions and Implications

Although Xiaomi described the incident as “normal” in the context of extreme use, the video raised concerns among some observers about the vehicle’s safety in everyday driving, especially in hot climates or during frequent, heavy braking.

What Does This Incident Mean for the EV Market?

This event highlights the challenges faced by new entrants in the EV market, particularly in brake systems that must balance high performance and safety under varied conditions.

It also underscores the importance of effectively using regenerative braking systems to reduce wear on traditional brakes, extending their lifespan and minimizing risks of overheating and potential fires.

Consumer Advice

• Ensure the regenerative braking system is active if available.
  
  

• Follow manufacturer guidelines for brake maintenance and regular inspections.
  
  

• Watch for signs of brake performance issues or overheating during driving.
  
  

While the brake fire on the Xiaomi YU7 Max during track testing may seem alarming, the company explains it as a normal phenomenon under extreme conditions, confirming that the brakes continue to function properly.

Safety remains a top priority, and users should understand how modern brake systems operate, especially in high-performance electric vehicles, to ensure a safe and reliable driving experience.