Coolant Expansion Tank for MG 3/MGTF (Coolant Expansion Tank) Old MG 3
Coolant Expansion Tank for MG 3/MGTF (Coolant Expansion Tank) Old MG 3
Coolant Expansion Tank for MG 3/MGTF (Coolant Expansion Tank) New MG 3SW Sub Coolant Tank
Coolant Expansion Tank for MG 3/MGTF (Coolant Expansion Tank) Old MG 3
Coolant Expansion Tank for MG 3/MGTF (Coolant Expansion Tank) Old MG 3
Coolant Expansion Tank for MG 3/MGTF (Coolant Expansion Tank) New MG 3SW Sub Coolant Tank
Coolant Expansion Tank for MG 3/MGTF (Coolant Expansion Tank) Old MG 3
Coolant Expansion Tank for MG 3/MGTF (Coolant Expansion Tank) Old MG 3
Coolant Expansion Tank for MG 3/MGTF (Coolant Expansion Tank) New MG 3SW Sub Coolant Tank

Coolant Expansion Tank for MG 3/MGTF

Regular price $139.99
Sale price $139.99 Regular price $155.00
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Coolant Expansion Tank for MG 3/MGTF (Coolant Expansion Tank) Old MG 3

Coolant Expansion Tank for MG 3/MGTF

Product description
Vehicle Fitment
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Features & Benefits

  • Precision OEM Fitment: Engineered as a 1:1 direct replacement for MG 3, MG 3SW, and MGTF models with perfectly aligned mounting points and hose connectors for plug-and-play installation.
  • Reinforced High-Temp Material: Premium UV-stabilized PA66/PP plastic withstands extreme thermal cycles without warping or cracking, outlasting cheap aftermarket alternatives.
  • Leak-Proof Ultrasonic Welding: Advanced ultrasonic welding technology creates a superior bond capable of handling high-pressure cooling systems and preventing seam leaks.
  • Clear Fluid Monitoring: High-translucency wall construction allows easy visibility of coolant color and level at a glance, ensuring you never run low on vital coolant.
  • Integrated Sensor Port: Precision-molded ports for factory coolant level sensor and overflow hoses keep your dashboard warning system fully functional and accurate.
  • Corrosion-Resistant Design: Internal structure resists modern OAT coolants, preventing chemical degradation and extending service life beyond standard generic tanks.

What's Included

1x Coolant expansion tank with cover

Installation Guides

  1. Safety Preparation Always perform this task when the engine is completely cold. Opening a hot cooling system can cause severe burns from pressurized steam. Place a drain pan under the vehicle to catch spilled coolant and have MG-approved coolant ready for topping up.
  2. Disconnect Sensor Unplug the electrical connector from the coolant level sensor located at the bottom or side of the old expansion tank.
  3. Drain Old Tank Use a siphon pump or carefully loosen the lower hose clamp to drain remaining coolant from the old tank into your container.
  4. Remove Hoses Use pliers to slide back spring clamps (or a screwdriver for screw clamps) on the upper overflow hose and lower main feed hose. Gently twist and pull the hoses off.
  5. Unbolt Tank Remove the mounting bolts (usually 8mm or 10mm) securing the tank to the vehicle chassis and lift the old tank out of the engine bay.
  6. Install New Tank Position the new expansion tank and tighten mounting bolts. Reconnect upper and lower hoses, ensuring clamps are seated firmly in their original positions.
  7. Reconnect Sensor Plug the electrical sensor back into the port on the new tank.
  8. Refill and Bleed Fill the new tank to the MAX line with recommended coolant. Start the engine with the cap off, let it reach operating temperature until the thermostat opens, massage hoses to remove air pockets, top up as needed, and tighten the pressure cap.
Year Brand Model
2011-2023 MG 3
2024 MG 3

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