I am reporting multiple critical component failures on my 2017 Volvo XC90, which I believe represent potential design or manufacturing defects related to vehicle safety and reliability. At approximately 93,000 miles, my Volvo XC90 experienced a battery failure, thermostat failure, which did not resolve the vehicle’s engine issues. Subsequently, the dealership diagnosed a failed Engine Control Module (ECM), requiring complete replacement at a cost of over $5,000. The ECM is a critical motherboard component responsible for engine control and vehicle safety operations. Its failure risks sudden engine malfunction, stalling, or loss of power while driving, which could cause unsafe conditions. I am concerned that multiple major component failures, especially in a premium brand vehicle under 100,000 miles and less than 10 years old, represent a systemic reliability issue. These failures occurred despite regular maintenance and responsible usage. I respectfully request that NHTSA investigate whether similar cases exist for 2016a“2018 Volvo XC90 models involving premature ECM or engine cooling, electrical, short circuit system failures. I am available to provide service records and additional documentation as needed.