San Diego summers bring gorgeous weather — but they can be tough on your vehicle. With temperatures regularly hitting the 80s and 90s inland, your car’s cooling system, tires, and battery all work overtime. Here’s how to keep your used car running strong through the warmest months.

Check Your Cooling System

Overheating is the number one cause of summer breakdowns. Before the heat hits, check your coolant level and condition. If it’s been more than two years or 30,000 miles since your last coolant flush, schedule one now. Inspect hoses for cracks or soft spots — San Diego’s heat accelerates rubber degradation.

Tire Pressure Matters More Than You Think

Hot pavement in areas like El Cajon, Escondido, and Santee can push surface temperatures well above 140 degrees Fahrenheit. Heat causes tire pressure to increase — for every 10-degree rise in temperature, your tires gain about 1 PSI. Over-inflated tires wear unevenly and can blow out. Check your pressure weekly during summer months, always when tires are cold.

Protect Your Battery

Contrary to popular belief, heat kills car batteries faster than cold. San Diego’s summer heat causes battery fluid to evaporate, leading to internal damage. If your battery is more than three years old, have it tested. A $15 battery test can prevent a $200 roadside emergency.

Keep Your AC in Top Shape

Your air conditioning system works hard during San Diego summers. If you notice reduced cooling, unusual odors, or strange noises when the AC runs, get it checked before the hottest months. A simple refrigerant recharge costs around $150-$250 and makes a world of difference in comfort.

Wiper Blades and Sun Protection

UV rays deteriorate wiper blades quickly. Replace them every six months in San Diego’s sunny climate. Use a quality windshield sun shade when parked, and consider window tinting (California allows 70% VLT on front side windows) to protect your interior from cracking and fading.

Need a Vehicle That’s Summer-Ready?

Every vehicle at Coastline Auto Specialist undergoes a thorough inspection before hitting our lot. As a Coastline Membership perk, you get free wiper blade replacements to keep your car summer-ready year-round. Browse our inventory today and drive away with confidence.