SBP Aluminum Coolant Overflow Reservoir Tank Bottle for 1984-1989 Toyota MR2 AW11

1984–1989 Toyota MR2 AW11 Aluminum Coolant Overflow Reservoir

This aluminum coolant overflow reservoir was designed and built as a direct replacement for the factory plastic tank, which has become increasingly difficult to source and is prone to cracking with age.

Constructed from high-quality aluminum, this unit offers improved durability, longevity, and a clean, motorsport-inspired look. If your MR2 has an engine swap, please review the provided dimensions to confirm fitment.

We also offer a combo version of this tank that integrates a coolant overflow and oil catch can.

Features

• Direct bolt-on installation — no drilling or modification required
  (OEM bracket requires shaving off the two factory dimples only)

• Designed to slide directly onto the OEM mounting bracket

• Billet aluminum cap

• Integrated coolant level sight gauge

• Top and bottom 6AN ORB ports
  (Other port sizes available upon request)

• 6AN ORB to 5/16” hose barb fittings included for OEM hose connections
  (Other sizes available upon request)

• Overflow drain tube — excess coolant will safely drain from the bottom if the tank overfills

• Professionally TIG welded

• Made in the USA

Important Notes

• Cap Color: Please select your preferred cap color from the drop down menu.

• Fitment Warning:
  Will not fit models equipped with a body bump and wiring harness grommet located directly below the factory coolant overflow tank.
  (Refer to photos for clarification.)

• Made to Order:
  Lead time is 5–15 business days.

• Due to the manufacturing process, some light surface scratches or imperfections may be present.

Installation Notes

• Top Port: connect to bleed valve (normally a clear plastic line with a rubber hose at the end).

• Bottom Port: connect to nipple at the fill cap.

• Aluminum tube under the tank: (Optional) connect a hose and route it to a safe location. If coolant level inside the overflow tank exceeds maximum, excess coolant will be relieved through this port. ** IMPORTANT** Do not block this port, it needs to remain open without any obstructions.