The coolant reservoir (expansion or overflow tank) stores excess coolant as it expands with heat and provides a low-pressure point to check coolant level safely.
Signs of a faulty part
If you notice any of the following, the part likely needs replacement:
Coolant leak or crack visible on the tank
Coolant level dropping consistently despite no visible leak elsewhere
Cap not sealing properly
Installation information
Bolts or clips into place, connected with a hose to the radiator or engine — always refill to the correct level marked on the tank.
Frequently asked questions
Most often from age and heat cycling making the plastic brittle, or from the cap seal failing and letting pressure build unevenly.
Super good! They came through with the part I needed, quickly and at a fair price! Thanks, and I definitely recommend!
I
Ilmars K.
August 2026
★★★★★
I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.
A
Aleksandr L.
Toyota Avensis
August 2026
★★★★★
No complaints about Evro Trans itself, everything's fine. But the delivery..... It felt like the order was being carried by turtles. 4 days from Riga to Daugavpils. Judging by the tracking, the parcel just sat somewhere behind a shed for 3 days, then they found it and delivered it the next day. I think that's why I won't be ordering there again.
P
Paul F.
June 2026
★★★★★
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
N
Natālija I.
May 2026
★★★★★
I ordered antifreeze heaters and an auxiliary pump. Everything arrived quickly, the very next day, and matched the description. I'm satisfied.
J
Juris J.
February 2026
★★★★★
Excellent service, timely delivery, and complete transparency at every step. I highly recommend EvroTrans to anyone looking for a reliable partner!
E
Egor S.
November 2025
★★★★★
Bought a front fender for my car. I liked it! After payment they sent more than 20 photos of the problem areas, and it was packed very securely - took a while to unwrap.