2020 TESLA MODEL X — Problems, Recalls & Safety Data

Making a loud squeaky noise and knocking while I turn. The noise is coming from the steering and front suspension arms I believe.

Making a loud squeaky noise and knocking while I turn. The noise is coming from the steering and front suspension arms I believe.

I am a software engineer and owner of two 2020 Tesla Model X (Raven) vehicles. Both exhibit a serious safety defect after installing firmware 2025.44.25.4 with FSD v12.6.4. Vehicle configuration: Model S/X with MCU2 (Intel Atom) and Hardware 3 (HW3). Defect description: When Full Self-Driving (FSD) is engaged, the vehicle intermittently enters a critical failure state while in motion: • The instrument cluster (driver display) suddenly goes completely black • The center screen issues a red “Take Control Immediately” alert with alarms • The infotainment computer performs a watchdog reset and reboots (Tesla logo appears) while the vehicle is traveling at highway speeds This has occurred multiple times on both vehicles. Suspected cause: The 2025.44 software update appears to introduce additional dashcam telemetry writes (speed, steering, FSD state) to the USB device while recording video. On MCU2 (Intel Atom), this creates an I/O and CPU bottleneck that starves display and safety-critical threads, triggering an operating-system watchdog reboot. Disabling Dashcam immediately stops the crashes, indicating a resource-exhaustion condition rather than driver error. Safety risk: During the blackout and reboot, the driver loses all visual feedback from the instrument cluster while being instructed to take control. This creates a high risk of collision, especially at highway speeds or in complex traffic environments. Severity: Loss of driver display and system reboot while driving constitutes a safety-critical defect. This condition could lead to serious injury or death. I request NHTSA investigation into instrument-cluster blackouts and system reboots on Tesla HW3/MCU2 vehicles when FSD and Dashcam are enabled.

My 2020 Tesla Model X experiences severe vibration, shaking, and rattling during acceleration, especially between about 20–45 mph and at higher suspension settings. The vibration is strong enough to affect steering stability and safe control of the vehicle during acceleration and lane changes. Tesla has already replaced the front half-shafts twice under warranty for this same problem, but the issue has returned again. This is a known defect documented by Tesla in Service Bulletin SB-21-39-001, which describes excessive front drive unit half-shaft vibration during acceleration and defines the repair with updated components. The latest revision of this bulletin (R3, dated January 19, 2024) explicitly adds “Customer Pay billing” instructions. Despite this, my local Tesla Service Center in Tempe, AZ (Supervisor: Lewis Holguin) refused to apply the SB-21-39-001 Customer Pay billing and instead charged full retail for the repair. On 11/28/2025, I was billed $1,694.86 out of pocket to replace both front half-shafts again (invoice shows approx. $1,046 in parts and $564 in labor). I have documentation showing that other Tesla customers with the same defect were billed only $350 under SB-21-39-001, which demonstrates that Tesla does apply a discounted bulletin rate in some cases. In my case, they refused to honor it even though this is a repeat failure of the same known defect and the prior warranty repairs did not permanently fix the problem. This is a repeat driveline/suspension defect that affects drivability and safety under acceleration. The shaking and vibration make it difficult to maintain stable vehicle control, especially during highway merging or lane changes. I am requesting that NHTSA investigate recurring front half-shaft failures and vibration/shudder issues on Tesla Model X vehicles and Tesla’s inconsistent handling of this known defect and service bulletin.

My 2020 Tesla Model X experiences severe vibration, shaking, and rattling during acceleration, especially between about 20–45 mph and at higher suspension settings. The vibration is strong enough to affect steering stability and safe control of the vehicle during acceleration and lane changes. Tesla has already replaced the front half-shafts twice under warranty for this same problem, but the issue has returned again. This is a known defect documented by Tesla in Service Bulletin SB-21-39-001, which describes excessive front drive unit half-shaft vibration during acceleration and defines the repair with updated components. The latest revision of this bulletin (R3, dated January 19, 2024) explicitly adds “Customer Pay billing” instructions. Despite this, my local Tesla Service Center in Tempe, AZ (Supervisor: Lewis Holguin) refused to apply the SB-21-39-001 Customer Pay billing and instead charged full retail for the repair. On 11/28/2025, I was billed $1,694.86 out of pocket to replace both front half-shafts again (invoice shows approx. $1,046 in parts and $564 in labor). I have documentation showing that other Tesla customers with the same defect were billed only $350 under SB-21-39-001, which demonstrates that Tesla does apply a discounted bulletin rate in some cases. In my case, they refused to honor it even though this is a repeat failure of the same known defect and the prior warranty repairs did not permanently fix the problem. This is a repeat driveline/suspension defect that affects drivability and safety under acceleration. The shaking and vibration make it difficult to maintain stable vehicle control, especially during highway merging or lane changes. I am requesting that NHTSA investigate recurring front half-shaft failures and vibration/shudder issues on Tesla Model X vehicles and Tesla’s inconsistent handling of this known defect and service bulletin.