Shop Radiator Overflow Tanks Online at My Auto Parts!

My Auto Parts is your one-stop shop for getting your car back on the road. We have a collection of high-quality OEM and aftermarket Radiator Overflow Tank to fit any make, model, and year—30-day fitment guarantee on all parts. Browse our Radiator Overflow Tank catalogue and get the parts you need to get back behind the wheel – fast!

Why is a Radiator Overflow Tank an essential part of your car?

Maintains Coolant Level: The radiator overflow tank, also called a coolant reservoir, stores excess coolant when the engine heats up. As the engine cools, the coolant contracts, and the reservoir supplies the radiator with the coolant it needs. This prevents the radiator from being overfilled when cold, which could lead to coolant spewing out when it expands.

Maintains Coolant Level: The overflow tank, also called a coolant reservoir, stores excess coolant when the engine heats up. As the engine cools, the coolant contracts, and the reservoir supplies the radiator with the coolant it needs. This prevents the radiator from being overfilled when cold, which could lead to coolant spewing out as it expands.


For further information about the aftermarket and OEM parts available across My Auto Parts, please refer to our guide.

Fast and Reliable Delivery:  

  • Discounted Shipping on Orders Over $199: For more information on our free shipping deal see *here.

  • 5 Australian warehouses: Get your orders quickly and efficiently, delivered directly from our local warehouses.

Shop Radiator Overflow Tank with Confidence: 

  • 5- Star ratings on Trustpilot: Our customers share why they enjoy shopping online at My Auto Parts!

  • 30-day no fault return policy: Changed your mind? Not a problem; after purchase, you have 30 days to return the part and get a refund.   

  • Get your questions answered: The My Auto Parts team is ready to answer your questions via online chat and guide you towards the perfect Radiator Overflow Tank. (click the Chat button on the bottom right corner)

  • Secure checkout: Shop with peace of mind, knowing your information is protected by our secure payment systems.   

  • Buy now, pay later services available: Popular payment management services are available at checkout.   

  • Full fitment information for all parts: Be sure to check the compatible vehicles section on each product page to make sure you have the right part for your vehicle. Search the website using part numbers for VINs

Customer Support and Information 

My Auto parts has been delivering car parts for 4 years now, with an inventory built off 30 years of experience in the auto parts industry. Our team is ready to help you with any questions you may have. We are on standby to ensure you receive the right advice and support when choosing from our Radiator Overflow Tank catalogue for your car. Start a chat by clicking the chat button at the bottom right. You can also email us at info@myautoparts.com.au or leave us a message here.

Big discounts up to 80% off list prices! View Sale Items here!  

Sort by:
Show:
Radiator Overflow Bottle OEM suits Radiator Overflow Bottle OEM suits
Quick View
Add to wishlist

Radiator Overflow Bottle OEM suits

[compatible-vehicles]Ford Ranger PX Cab Chassis 4x2 XL Manual 2.5L 4Cyl Petrol 2Dr RWD 10/2011-9/2015 Pick-Up 4x2 XL Manual 2.5L 4Cyl Petrol 4Dr RWD 10/2011-9/2015 Mazda BT-50 UP Gt 4X4 Dual...
$80.33
check compatible vehicles
Add to wishlist
Add to compare
Radiator Overflow Bottle Aftermarket suits Mazda 3 Radiator Overflow Bottle Aftermarket suits Mazda 3
Quick View
Add to wishlist

Radiator Overflow Bottle Aftermarket suits Mazda 3

[compatible-vehicles]Mazda 3 BK Hatch Maxx Automatic 2.0L 4Cyl Petrol 4Dr FWD 1/2004-6/2006 Hatch Maxx Automatic 2.0L 4Cyl Petrol 4Dr FWD 7/2006-3/2008 Hatch Maxx Manual 2.0L 4Cyl Petrol 4Dr FWD 1/2004-6/2006...
$49.57
check compatible vehicles
Add to wishlist
Add to compare
Radiator Overflow Bottle Aftermarket suits Ford Laser and Mazda 323 1994 to 1998 Radiator Overflow Bottle Aftermarket suits Ford Laser and Mazda 323 1994 to 1998
Quick View
Add to wishlist

Radiator Overflow Bottle Aftermarket suits Ford Laser and Mazda 323 1994 to 1998

[compatible-vehicles]Ford Laser KJ / Kj2 (Kl) 4/5Dr 8/1994-11/1998 Lynx 3Dr 7/1994-11/1996 Mazda 323 BA Astina 4Dr Hardtop 5/1994-4/1998 Astina 5Dr 5/1994-4/1998 Protege 4Dr 6/1994-6/1998 [/compatible-vehicles]
$26.52
check compatible vehicles
Add to wishlist
Add to compare
Quick View
Add to wishlist

Radiator Overflow Bottle Aftermarket suits Mazda CX-3 DK

Radiator Overflow Bottle suits Mazda CX-3. Fits on Mazda CX-3 DK built from 2017 to 2019. This Radiator Overflow Bottle is a quality Aftermarket product.[compatible-vehicles]Mazda CX-3 DK SUV Akari 5/2017-8/2018...
$49.14
check compatible vehicles
Sold Out
Add to wishlist
Add to compare
Radiator Overflow Bottle OEM suits Mazda CX-3 DK Radiator Overflow Bottle OEM suits Mazda CX-3 DK
Quick View
Add to wishlist

Radiator Overflow Bottle OEM suits Mazda CX-3 DK

[compatible-vehicles]Mazda CX-3 DK SUV Akari 3/2015-4/2017 SUV Maxx 3/2015-4/2017 SUV Neo 3/2015-4/2017 SUV S-Touring 3/2015-4/2017 Wagon Akari AWD Automatic 1.5L 4Cyl Turbo Diesel 4Dr 4WD 1/2016-5/2017 Wagon Akari AWD Automatic...
$98.26
check compatible vehicles
Add to wishlist
Add to compare
Quick View
Add to wishlist

OEM Radiator Overflow Bottle / to / - 25430H8510

Radiator Overflow Bottle suits . Fits on built from / to /. This Radiator Overflow Bottle is a quality OEM product. Check compatible vehicle destails to make sure this part...
$251.28
check compatible vehicles
Sold Out
Add to wishlist
Add to compare
Show: