The heat is your biggest enemy.
Phoenix averages 110+ days per year above 100°F. That extreme heat accelerates battery degradation — most car batteries in Phoenix last just 2–3 years compared to 4–5 years in cooler climates. It also causes tire pressure spikes, rubber degradation, and coolant system strain. The result: Phoenix sees some of the highest per-capita roadside breakdown rates in the United States, particularly from June through September.