Description
Description:
Mitsubishi Triton L200 / Challenger / Pajero Sport (Montero Sport) 2015–2022 Radiator Expansion Tank / Coolant Reservoir
The radiator expansion tank (coolant overflow bottle) for the Mitsubishi Triton L200 (MQ / MR), Challenger, and Pajero Sport / Montero Sport (2015–2022) is a key part of the engine cooling system that stores and manages excess coolant as the engine heats up.
When the engine reaches operating temperature, coolant expands and flows into this reservoir. As the engine cools, it is drawn back into the radiator, maintaining correct coolant levels and preventing air from entering the system. This helps ensure stable engine temperatures and protects against overheating under load, towing, or off-road conditions.
Features:
Fitment: Mitsubishi Triton L200 (2015–2022), Challenger, Pajero Sport / Montero Sport
Function: Stores and recovers expanding engine coolant
Material: High-strength heat-resistant plastic
System role: Maintains radiator pressure balance and coolant recovery cycle
Location: Mounted in engine bay connected to radiator overflow line
Package Includes:
1 × Coolant Reservoir Overflow Bottle














