How to identify a mystery liquid leaked inside my car
Unknown puddles or fluid spray inside a vehicle cabin often stem from failing heater cores, clogged A/C evaporator drains, or compromised power steering lines. These leaks leave car owners trying to identify strange colored fluids to anticipate expensive repair bills and avoid unnecessary mechanic visits.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Using Lysol wipes and soapy water to clean the affected interior surfaces
- 2Crawling under the vehicle to visually inspect the leak source
- 3Bringing the vehicle to a professional mechanic for diagnosis
- 4Waiting until the mechanic reopens to get a professional diagnosis
In their words
Unedited, most upvoted first, each linked to the thread it came from.
“When my gf and I went to her car this morning we found this odd orange liquid in the interior.”source ↗
“Any idea what kind of fluid this is?”source ↗
“noticed a leak from what looks like the transaxle? The fluid looks dark brown no leaks appeared from above. Any idea what it could be is it still safe to drive?”source ↗
“I just noticed what I believe to be coolant (possible power steering fluid?) leaking from the front passenger side of my JKU.”source ↗
“Crawled under and found this plastic hose to be the source of the leak.”source ↗
“I’d like to research a bit before bringing it in and know what I’m in for for possible replacement costs.”source ↗