2025 Toyota Highlander Coolant in Peoria, AZ

Watch for rising engine temperature, a sweet odor, visible leaks, low coolant in the reservoir when cold, or heater performance that’s weak or inconsistent.

These symptoms point to degraded coolant, a leak, or circulation issues that merit testing and inspection. Because the system is pressurized and can be hot after running, only check levels when the engine is fully cold. A technician can pressure test the system and verify fan and thermostat operation to pinpoint causes before damage occurs.

• Temperature gauge trending higher than normal
• Coolant warning light or repeated low reservoir level (cold)
• Sweet smell, colored residue, or wet spots near hoses or radiator

The service drains old coolant, refills with the manufacturer‑specified coolant, pressure tests for leaks, and inspects caps, hoses, fans, water pump areas, and thermostat function.

Technicians also check heater performance, verify correct radiator cap sealing and pressure rating, and confirm electric fan engagement. Documentation outlines findings and any recommended repairs. This approach restores proper protection and ensures the system maintains pressure and flow under real‑world conditions.

• Drain and refill with the correct, manufacturer‑specified coolant
• System pressure test and leak inspection end‑to‑end
• Operational checks for fans, thermostat, and heater

The manufacturer publishes a service schedule for this vehicle, and that schedule is the authority for when to replace the coolant.

Between scheduled changes, a technician can test coolant condition during a service visit to assess protection and inhibitor health. Driving in high heat, towing, or frequent short trips may warrant closer monitoring. For plan‑ahead convenience, review our service specials and schedule service when it suits you.

• Follow the manufacturer’s maintenance schedule
• Request a coolant test at routine visits
• Adjust monitoring for severe heat or heavy loads

The manufacturer specifies the exact coolant type for this vehicle, and coolants are not interchangeable; color is not a reliable identifier.

Using an incorrect product can reduce corrosion protection, alter boiling protection, or create deposit formation. During service, we install the coolant the manufacturer specifies for the 2025 Toyota Highlander to maintain designed protection and compatibility. When in doubt, book a visit so the correct fluid is verified and installed.

• Do not mix coolant types based on color
• Use only the manufacturer‑specified coolant
• Have a professional confirm compatibility before adding

Topping off restores level but does not refresh the additive package, and a level that keeps dropping indicates a leak that needs inspection.

Only check the reservoir when the engine is completely cold; the system is pressurized and can be dangerously hot after running. If you’ve topped up more than once, schedule a pressure test to find the source rather than continuing to add fluid. Book a diagnostic visit now to protect the engine.

• Check coolant cold—never open a hot system
• Repeated top‑offs point to a leak, not normal use
• Schedule service for a pressure test and repair plan

Use our online portal to schedule appointment, explore service specials, or call the store for assistance.

We’re conveniently located off Loop 101 at 8633 W Bell Rd, Peoria, AZ 85382, serving the Phoenix West Valley and Greater Phoenix metro area. If your 2025 Toyota Highlander shows cooling concerns—or it’s time for routine maintenance—book a visit that fits your day.

• Schedule service online anytime
• Check current service specials before you book
• Call {{rooftop.phone}} for help or availability