Quick answer: clear, odorless water dripping from under the front of your car, usually near the passenger side, after using the air conditioning is normal condensation. A few drops of water from the tailpipe on a cold start are also normal. If the fluid has color, a smell or feels slippery, it is not water, and you should identify it.
How to Identify a Leak
Slide a sheet of white paper or cardboard under the car overnight. In the morning, check the color, smell, texture and where on the paper it dripped.
| Color and feel | Likely fluid | Typical location | How serious |
|---|---|---|---|
| Clear, like water, no smell | A/C condensation | Front, near the passenger footwell | Normal |
| Green, orange or pink, sweet smell | Coolant | Front of the engine or radiator | Fix soon: can cause overheating |
| Blue, smells like window cleaner | Washer fluid | Near a front corner | Minor |
| Light brown to black, slippery | Engine oil | Under the engine | Fix soon |
| Red or pink, slippery | Transmission or power steering fluid | Middle or front of the car | Fix soon |
| Clear to yellow-brown, slippery | Brake fluid | Near a wheel or behind the engine | Serious: do not drive |
For more on fluid colors, see our transmission fluid color guide and our guide to checking car fluids.
Water Leaking Inside the Car
Damp carpets or water inside the cabin are not normal. Common causes include:
- Blocked A/C drain: condensation backs up and drips into the front passenger footwell.
- Clogged sunroof drains: water runs down the pillars and into the headliner or footwells.
- Worn door or window seals: water gets in during heavy rain or car washes.
- Leaking heater core: damp carpet with a sweet coolant smell and a foggy windshield.
Dry the carpets quickly to prevent mold and musty smells.
Frequently Asked Questions
Is it normal for my car to leak water after turning it off?
Yes. If you used the A/C, condensation can keep dripping for a while after you park.
Why is water dripping from my exhaust?
Burning fuel produces water vapor, which condenses in a cold exhaust. Small drips on startup are normal. Large amounts of white smoke and constant dripping once warm, with coolant loss, can point to a head gasket problem.
How do I know if it is coolant or water?
Coolant has a color (green, orange or pink), a sweet smell and a slightly slippery feel. Water has no color or smell. Also check whether the coolant level in the reservoir is dropping.
