Clear Water Leak Under Toyota RAV4 (AC Off)
A clear water leak when the AC is off is unusual but often harmless. It could be condensation from the AC evaporator drain (if residual moisture drains after use), rainwater from the cowl or sunroof drains, or a small coolant leak (coolant is usually colored, but diluted coolant can appear clear). Since the AC wasn't on, the most likely cause is residual condensation or rainwater drainage.
Diagnosis Details
Possible Causes
Residual condensation from the AC evaporator drain (moisture left in the system after previous AC use)
Rainwater or car wash water draining from the cowl or sunroof drain tubes
Small coolant leak (coolant may appear clear if heavily diluted, but usually has a color or sweet smell)
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What You Should Do
Check the fluid color, smell, and consistency.
If it's clear, odorless, and watery, it's likely condensation or rainwater.
Monitor the leak location and frequency.
If it persists or has a sweet smell, check coolant level and look for leaks near the radiator, hoses, or water pump.
If you suspect a coolant leak, have the system pressure tested.
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
