How to remove the Coolant Reservoir assembly on Toyota Prius?

The procedure of removing the coolant heat storage tank assembly requires an initial and post-procedure DTC check to verify no errors are detected. Exercise caution with the tank because surface temperatures can increase from malfunctions so do not attempt to touch it to keep from getting burned. Workers should start by removing the rear No. 2 floor board alongside the rear deck floor box and the rear No. 3 floor board. Disconnect the battery negative terminal cable then let it rest for 90 seconds to stop Air Bag and seat belt pretensioner activation. The upkeep begins with removal of the radiator support opening cover followed by the engine under cover LH and RH together with the front bumper cover while partially removing the front fender liner LH. Drain the engine coolant through the drain cock plug while being cautious due to the hot temperature of the coolant in the tank. The final step requires removal of the coolant heat storage tank assembly by disconnecting all 2 hoses and water pump motor connectors along with the temperature sensor connectors followed by unfastening the hardware consisting of the nut and 4 bolts while securely gripping the coolant heat storage tank to avoid bracket bending. Remove the coolant heat storage tank by first separating the stud bolt and 2 claws according to the provided illustration.

OEM Toyota Prius Coolant Reservoir

Coolant Tank Reservoir

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6 Coolant Reservoirs found

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Toyota Prius Expansion Tank
Part Number: 164A2-37012
$75.83 MSRP: $106.44
You Save: $30.61 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Tank, Reserve Sealed Without Cap; Engine Coolant Reservoir; Reservoir; Tank, Reserve Sealed W/O Cap; Coolant Reservoir
- Replaces: 164A2-0T021
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2016-2020 Toyota Prius | Four, Four Touring, L Eco, LE, Limited, One, Three, Three Touring, Two, Two Eco, XLE | 4 Cyl 1.8 L FULL HYBRID EV-GAS (FHEV)
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Toyota Prius Reserve Tank
Part Number: 164A2-37011
$75.83 MSRP: $106.44
You Save: $30.61 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Engine Coolant Reservoir; Tank, Reserve Sealed W/O Cap; Coolant Reservoir
- Replaced by: 164A2-37012
- Replaces: 164A2-37010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2016-2020 Toyota Prius | Four, Four Touring, L Eco, LE, Limited, One, Three, Three Touring, Two, Two Eco, XLE | 4 Cyl 1.8 L FULL HYBRID EV-GAS (FHEV)
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Toyota Prius Expansion Tank
Part Number: 16470-37040
$54.72 MSRP: $76.16
You Save: $21.44 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Reserve Tank Assembly, Radiator Reserve; Engine Coolant Reservoir Cap; Engine Coolant Reservoir; Reservoir Tank; Reservoir; Tank Assembly, Radiator Reserve; Coolant Reservoir
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2021-2023 Toyota Prius | 2020 Edition, L Eco, LE, Limited, XLE | 4 Cyl 1.8 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.0 L FULL HYBRID EV-GAS (FHEV)
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Toyota Prius Reserve Tank
Part Number: 16470-21010
$72.87 MSRP: $102.28
You Save: $29.41 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Reserve Tank Assembly, Radiator Reserve; Engine Coolant Reservoir; Tank Assembly, Radiator Reserve; Coolant Reservoir
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2001-2003 Toyota Prius | Base | 4 Cyl 1.5 L FULL HYBRID EV-GAS (FHEV)
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Toyota Prius Reserve Tank Assembly, Radiator W/O Cap
Part Number: 16480-28080
$236.13 MSRP: $337.15
You Save: $101.02 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Reserve Tank Assembly, Radiator Reserve; Coolant Reservoir
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2010-2015 Toyota Prius | Base, Five, Four, One, Persona Series, Three, Two | 4 Cyl 1.8 L FULL HYBRID EV-GAS (FHEV)
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Toyota Prius Reserve Tank
Part Number: 16660-21011
$1433.51 MSRP: $2100.82
You Save: $667.31 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Tank Assembly, Coolant Heat Storage; Drive Motor Inverter Coolant Reservoir; Coolant Reservoir
- Replaces: 16660-21010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2004-2009 Toyota Prius | Base, Touring | 4 Cyl 1.5 L FULL HYBRID EV-GAS (FHEV)

Toyota Prius Coolant Reservoir

Choose genuine Coolant Reservoir that pass strict quality control tests. You can trust the top quality and lasting durability. Shopping for OEM Coolant Reservoir for your Toyota Prius? Our website is your one-stop destination. We stock an extensive selection of genuine Toyota Prius parts. The price is affordable so you can save more. It only takes minutes to browse and find the exact fit. Easily add to cart and check out fast. Our hassle-free return policy will keep you stress-free. We process orders quickly for swift delivery. Your parts will arrive faster, so you can get back on the road sooner.

The Toyota Prius coolant reservoir now and then known as the coolant recovery tank is another extremely important component in the car's cooling systems that stores extra coolant in order to avoid it spilling or air entering the system. There are two main types of Coolant Reservoirs used in Prius vehicles: and two types of the tank as the overflow tank systems and expansion tank systems. Overflow has just a simple and cheap plastic cap and coolant can be forwarded from the radiator to the recovery tank if pressure is beyond the capacity of the cap with the help of overflow system, whereas in the expansion system the tank is pressurized and made up of a heavier cheap plastic in which air is released if pressure is too high. A guide is advised to take time often to inspect the Coolant Reservoir so as to confirm it is in good shape and not leaking or cracked.

Toyota Prius Coolant Reservoir Parts and Q&A

Reserve Tank
16660-21011
Q: How to remove the Coolant Reservoir assembly on Toyota Prius?
A:
The procedure of removing the coolant heat storage tank assembly requires an initial and post-procedure DTC check to verify no errors are detected. Exercise caution with the tank because surface temperatures can increase from malfunctions so do not attempt to touch it to keep from getting burned. Workers should start by removing the rear No. 2 floor board alongside the rear deck floor box and the rear No. 3 floor board. Disconnect the battery negative terminal cable then let it rest for 90 seconds to stop Air Bag and seat belt pretensioner activation. The upkeep begins with removal of the radiator support opening cover followed by the engine under cover LH and RH together with the front bumper cover while partially removing the front fender liner LH. Drain the engine coolant through the drain cock plug while being cautious due to the hot temperature of the coolant in the tank. The final step requires removal of the coolant heat storage tank assembly by disconnecting all 2 hoses and Water Pump motor connectors along with the temperature sensor connectors followed by unfastening the hardware consisting of the nut and 4 bolts while securely gripping the coolant heat storage tank to avoid bracket bending. Remove the coolant heat storage tank by first separating the stud bolt and 2 claws according to the provided illustration.