MiMi Auto Parts
EXPANSION TANK, Cooltec

EXPANSION TANK

Brand: Cooltec

SKU: 468995

Category: COOLING, WATER BOTTLE

R1 092,50 incl. 15% VAT

✓ In stock, ships nationwide via The Courier Guy

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Fitment: Fits selected BMW models. Confirm exact fitment before ordering.

Product Description

The Cooltec Expansion Tank is a crucial component in your BMW's cooling system, designed to manage coolant overflow and maintain proper pressure. This cooling water bottle serves as a reservoir for excess coolant, helping to prevent overheating and ensuring efficient engine temperature regulation. Its robust black plastic construction includes integrated mounting tabs, multiple hose connection points, and a threaded cap opening for secure sealing.

This expansion tank is compatible with select BMW petrol models, including the E60, E61, E63, and E64 series. It is important to confirm your vehicle's model, year, engine size, and engine code to ensure the correct fitment for your specific BMW.

Common symptoms of a failing expansion tank include coolant leaks, low coolant warning lights, visible cracks or bulges in the tank, engine overheating, inconsistent coolant levels, and steam from the engine bay. You may also notice a sweet smell from leaking coolant or a drop in heater performance.

Replace the expansion tank if you observe any signs of leakage, cracks, or if the tank is no longer maintaining proper coolant pressure. Timely replacement helps to avoid engine overheating and potential damage to other cooling system components.

MiMi Auto Parts offers this Cooltec expansion tank with reliable nationwide delivery across South Africa. Trust our team to help you find the right part for your BMW, and always verify your vehicle details before ordering to ensure compatibility.

Common signs this part may need replacement

  • Coolant leaking near the expansion tank
  • Low coolant warning light on dashboard
  • Cracks or bulges in the tank body
  • Engine overheating
  • Inconsistent coolant levels
  • Steam or vapour from engine bay
  • Sweet smell of coolant
  • Drop in cabin heater performance

Typical replacement guidance

Replace the expansion tank if you notice visible cracks, leaks, or if the tank is unable to maintain proper coolant levels. Doing so ensures the cooling system operates efficiently and prevents more serious engine damage.

Why timely replacement matters

A faulty expansion tank can lead to coolant loss and engine overheating, risking severe engine damage. Timely replacement ensures your BMW's cooling system remains reliable and effective.

Vehicle Compatibility

This part is confirmed to fit the following vehicles:

  • BMW 5 (E60) 2001 – 2010 523 i (N52 B25 A|N52 B25 B|N52 B25 BE) – 130 kW / 177 HP
  • BMW 5 (E60) 2001 – 2010 523 i (N52 B25 A|N52 B25 BE) – 140 kW / 190 HP
  • BMW 5 (E60) 2001 – 2010 525 i (M54 B25 (256S5)) – 141 kW / 192 HP
  • BMW 5 (E60) 2001 – 2010 525 i (N52 B25 A|N52 B25 B|N52 B25 BF) – 160 kW / 218 HP
  • BMW 5 (E60) 2001 – 2010 525 xi (N52 B25 A) – 160 kW / 218 HP
  • BMW 5 (E60) 2001 – 2010 530 i (M54 B30 (306S3)) – 170 kW / 231 HP
  • BMW 5 (E60) 2001 – 2010 530 i (N52 B30 A|N52 B30 BF) – 190 kW / 258 HP
  • BMW 5 (E60) 2001 – 2010 530 i (N53 B30 A) – 200 kW / 272 HP
  • BMW 5 (E60) 2001 – 2010 535 i (N54 B30 A) – 225 kW / 306 HP
  • BMW 5 (E60) 2001 – 2010 545 i (N62 B44 A) – 245 kW / 333 HP
  • BMW 5 (E60) 2001 – 2010 550 i (N62 B48 B) – 270 kW / 367 HP
  • BMW 5 Touring (E61) 2004 – 2010 523 i (N52 B25 A) – 140 kW / 190 HP
  • BMW 5 Touring (E61) 2004 – 2010 523 i (N52 B25 A|N52 B25 B|N52 B25 BE) – 130 kW / 177 HP
  • BMW 5 Touring (E61) 2004 – 2010 525 i (M54 B25 (256S5)) – 141 kW / 192 HP
  • BMW 5 Touring (E61) 2004 – 2010 525 i (N52 B25 A|N52 B25 B|N52 B25 BF) – 160 kW / 218 HP
  • BMW 5 Touring (E61) 2004 – 2010 530 i (N52 B30 A|N52 B30 BF) – 190 kW / 258 HP
  • BMW 5 Touring (E61) 2004 – 2010 530 i (N53 B30 A) – 200 kW / 272 HP
  • BMW 5 Touring (E61) 2004 – 2010 545 i (N62 B44 A) – 245 kW / 333 HP
  • BMW 5 Touring (E61) 2004 – 2010 550 i (N62 B48 A|N62 B48 B) – 270 kW / 367 HP
  • BMW 6 (E63) 2003 – 2010 645 Ci (N62 B44 A) – 245 kW / 333 HP
  • BMW 6 (E63) 2003 – 2010 650 i (N62 B48 B) – 270 kW / 367 HP
  • BMW 6 Convertible (E64) 2004 – 2010 650 i (N62 B48 B) – 270 kW / 367 HP

Fitment support

Not sure if this part fits your vehicle? Contact MiMi Auto Parts with your vehicle make, model, year, and engine code before ordering and we will help confirm fitment.

Installation note

Cooling system work involves draining and refilling coolant and may require specialised tools. Professional installation is recommended to ensure correct coolant mixture, bleeding of air from the system, and leak-free connections.

Frequently Asked Questions

What are the signs of a failing water pump?

Common signs may include coolant leaks near the front of the engine, engine overheating, a whining or grinding noise from the water pump area, or coolant loss without visible external leaks. Diagnosis should be confirmed before replacement.

Can I drive with a coolant leak?

Driving with a coolant leak is not recommended. Loss of coolant can lead to engine overheating and potentially serious engine damage. The vehicle should be inspected and the leak repaired before further driving.

Does this part fit my vehicle?

Please check the vehicle compatibility section on this page and confirm your vehicle make, model, year, engine size, and engine code before ordering. If you are unsure, contact MiMi Auto Parts before checkout.

Is the price VAT-inclusive?

Yes, product prices on MiMi Auto Parts are shown inclusive of VAT where applicable.

Do you deliver across South Africa?

Yes, MiMi Auto Parts delivers nationwide in South Africa. Delivery cost and estimated timing are calculated during checkout based on your location.

Is professional installation recommended?

Professional installation is recommended for safety-critical and technical parts such as airbag, clock spring, brakes, suspension, steering, clutch, cooling, engine, and electrical components. For guidance specific to this part, see the installation note on this page.

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