Fluid Leak Under Tesla Model 3
A small amount of brown/black fluid leaking under a 2020 Tesla Model 3 could indicate an oil or coolant leak, though Tesla electric vehicles have minimal fluids. The most common sources are gearbox oil (drive unit), brake fluid (if dark), or coolant (if brown from contamination). Given the small amount, it's not immediately critical but should be inspected soon.
Diagnosis Details
Possible Causes
Drive unit oil leak (gearbox oil) – often brown/black and may drip from the drive unit seals or drain plug.
Brake fluid leak – can appear brown/black if old or contaminated; may come from calipers or lines.
Coolant leak – coolant is usually orange/pink, but if mixed with dirt or degraded, it can appear brownish; may come from radiator hoses or pump.
Related OBD-II Codes
Not satisfied with this diagnosis?
Try Another DiagnosisWhat To Do Next
What You Should Do
Check fluid color and smell (oil has a distinct odor, coolant is sweet).
Inspect under the car for the exact source.
If it's oil, check drive unit fluid level.
If brake fluid, check brake pedal feel and reservoir.
If coolant, check coolant level and for overheating.
For any leak, schedule a service appointment with Tesla or a certified shop.
Related Repairs
Share this diagnosis
Help others with similar symptoms
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.
