Where is the coolant reservoir tank located?
The coolant reservoir is usually a translucent plastic tank in the engine bay near the radiator, with MIN and MAX level marks and a labeled cap.
While this is common, the exact placement varies by make and model. This guide outlines typical locations and how to confirm the position for your specific vehicle.
Typical locations to check
To help you locate the reservoir, look for a white or light-colored plastic tank connected to hoses and mounted within the engine bay. The following spots recur across many cars.
- Front of the engine bay near the radiator core support, often on the driver’s side or the passenger side depending on the vehicle layout.
- Along a sidewall of the engine bay, near the wheel well or fender, sometimes tucked next to coolant hoses feeding the heater core.
- Mounted on the radiator support beside the cooling fans, sometimes close to the hood hinge area.
- In some hybrids or newer models, there may be a second reservoir for separate cooling circuits (inverter or secondary systems).
In practice, you’ll typically see a translucent reservoir with a cap labeled “Coolant” or “Engine Coolant,” and clear MAX/MIN markings indicating the proper fill range.
How to confirm the exact location for your vehicle
Always consult your vehicle’s owner’s manual or service manual for the precise location and refill procedure. If you still can’t locate it, examine an under-hood diagram on the underside of the hood or contact the manufacturer’s customer support or a professional mechanic.
What to do if you’re checking or refilling
Open the reservoir cap only when the engine is cold, and use the coolant type specified for your vehicle (often a 50/50 mix of distilled water and ethylene glycol-based coolant, or a pre-mixed coolant). After filling, reinstall the cap firmly and check for leaks.
These steps help ensure you refill the coolant safely and correctly, preventing overheating and damage to the cooling system.
Summary: The coolant reservoir is typically a translucent tank in the engine bay near the radiator, marked with MIN/MAX levels. Exact placement varies by model, so consult your manual or diagram to locate yours. Regular checks help maintain engine temperature and reliability.
